Six
ETHICAL ASPECTS IN INTRODUCINGGENETICALLY MODIFIED ORGANISMS
FOR PUBLIC HEALTH PURPOSES
Darryl R. J. Macer
1. Introduction
Currently, researchers in several locations are working to develop geneticallymodified (GM) mosquitoes for control of vectors that transmit diseases such as
dengue fever, malaria, and Chagas disease. The use of GM insects for controlof human disease can be consistent with common ethical norms of society. The
approach raises few intrinsic ethical issues. Still, before we release any GM
insects, we need to assess potential impact on the environment and on humanhealth. We need to establish universal minimal standard of risk assessment,
applicable to disease vectors, because diseases and vectors can cross nationaland continental borders. Stakeholders should consider ethical issues including
community engagement, informed consent, group consent, and relations between researchers and local populations. Each community needs to decide its
policy guidance for ethical genetic engineering and to negotiate agreementswith neighboring countries.

2. The Ethics of Disease Prevention
Because of the widely held ethical principle that human life is worth saving, weusually see global support of efforts to improve existing and develop new approaches for preventing, diagnosing, treating, and controlling infectious diseases
that cause loss of human life.1 But societies are vastly diversified, exhibiting awide range of worldviews and social structures. Despite consensus on theoverall goal, methods to achieve these goals, including the extent to whichrisks to human health, damage to the environment and other living organisms,
and how economic costs are balanced with the need to invest in other goals,
have sparked intense debates.
Well-defined principles basic to resolving ethical dilemmas can help decision makers construct policy decisions that are more informed. The principlethat we should love the life given to us (self-love) implies that each person
should enjoy autonomy (self-rule) to work independently out how to balance
ethical dilemmas and choices.2 The Universal Declaration of Human Rights of

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1948 started with the premise that all human beings possess equal rights anddeserve the opportunity to exercise autonomy. Persons who do not enjoy somebasic level of health cannot make choices commonly accepted as normal. Poverty
also restricts choice for many people, and in areas plagued with high incidence of
infectious insect borne diseases, we often find widespread poverty as well.3
At present, we see a great inequality between rich and poor nations in the
direction and priorities of research, and in the distribution of and access tobenefits that might come from this research. Under any ethical theory, thepresence of diseases that threaten the lives more than a billion people worldwide provides a compelling impetus for efforts to eradicate the diseases.
Around the world, we see wide diversity in the risks that members of different
communities face from infectious diseases due to individual genetic variationin resistance to infectious disease agents, in individuals’ nutritional state andimmediate environment, families’ economic situation with respect to providing
barriers to vectors and disease, and in access to preventative and therapeutic
medicines. Working towards better global equity is a goal that attempts to meliorate the impoverished conditions into which some people are born and to
improve their opportunities to thrive. Rawlsian justice holds this as an ethicalmandate. John Rawls, in A Theory of Justice, argues that efforts should bemade to minimize the variation in all social factors because no one knows before they are born into which situation they will be born. Therefore, everyone
would wish for equal opportunity and equal exposure to risk. All people
should have the opportunity to be born and grow up in an environment free of
infectious diseases, if that ideal achievable. 4
Human beings have used technology in efforts to make their lives easierand better for thousands of years. The ethical principle of beneficence supports
the development of science and medicine, and its provision to those who suffer, because we should continue to make life better. Beneficence is based on
the belief that all people have an intrinsic motivation to love doing good instead of harm, expressed as compassion.5 Efforts that work toward the betterment of others have a universal moral mandate.
The ethical principle of nonmaleficence, do no harm, dictates that weshould be reasonably cautious about premature use of a technology before
potential risks are understood. Recently some proponents have advocated a
total precautionary principle for genetic engineering, which means that notechnology with any known risk should be attempted.6 The Cartagena Protocol
on Biosafety, an international, legally binding agreement that regulates international movement of living modified organisms (LMOs), advises this extreme caution.7 Since no human action can be guaranteed to have zero risk, inpractice, these principles are used to assess the relative safety of technology
and are central to any public health program.8
The ethical issues raised by biotechnology are often the same ones that
we debated in applied ethics long before we had modern biotechnology.9 We
can view ethics in terms of ecocentric, biocentric, or anthropocentric concerns.
Ecocentric concerns, those that value the ecosystem as a whole, find expres-Ethical Aspects in Introducing GMOs for Public Health Purposes

71sion in environmental concerns. Reverence for life applies to every member ofthe whole ecosystem.10 Biocentric thinking emphasizes the value of individualorganisms, whether plant or animal. Anthropocentric thinking focuses on human individuals. Trends have emerged for more ecocentric views to be included in recent legislation, with protection of ecosystems as a primary goal.
While isolating distinct issues is useful, separating human nature from social
interactions is not realistic because almost all of human life is composed of social activity, involving many relationships between people and the ecosystem.
Different ethics apply when human activity, for example agriculture or urbanization, attempts to either dominate nature or harmonize with the environment.
Literature contains a variety of definitions for health, disease, disability,
and meaningful human life. Working to alleviate disease and empower individuals to reach their potential are universal goals for the progress of humankind. Authors apply different persons in the same culture and have a wide
range of differences between cultures. Working to alleviate disease and empower individuals to reach their potential are universal goals for the progressof humankind that cross all definitions.
We can apply the basic ethical principles of autonomy, justice, beneficence, and nonmaleficence to decision making in the face of a range of bioethical dilemmas found in medical and environmental ethics. Whether further
ethical principles can always be derived from these has been debated,11 but thegeneral consensus is that these four principles are fundamental across a rangeof cultures.12 The emphasis on individuals’ rights that has been a feature oftheories of bioethics in North America is less developing countries. Other ethics theories focus on the community. These theories hold that individual rights
or are not well suited to the community structure of some societies.

3. Bioethics and Molecular Entomology
Genetically modified organisms (GMOs) can be used for public health purposes in a variety of ways. Control of disease vectors is an emerging practicalpossibility. We already have a long history of altering the behavior of vectors
so that they cannot transmit pathogens to human beings.13 Insects have also
long been the targets of attention in agriculture and medicine. While few intrinsic ethical concerns about killing insect pests exist, ecocentric approaches
to ethics do raise some objections to modification of ecosystem components,
and we need to more seriously address those concerns.
People of many cultures have developed biotechnologies as they cohabitate
with non-human animal species in the wider biological and social community.
Biotechnology means biological science applied especially in genetic engineering and recombinant DNA technology. For the purpose of this paper, I will focus
on biotechnology that uses living organisms, especially GMOs, in the productionof goods or services. Modern biotechnology is founded on the same traditionof plant and animal breeding that gave rise to agricultural societies. Since the72

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mid1990s, a growing number of countries have sold foods produced from
GMOs.14 Fierce international debates have argued the environmental and human health aspects of genetically modified (GM) foods, but so far, science has
demonstrated no harmful effects of GM foods on human health.15 Some independent organizations, voicing concern about the environmental impact ofgene transfer, have submitted reports containing a wealth of useful information
about the technology and commentary on relevant ethical issues to several
governments for consideration.16
Genetic engineering allows genes exchange of genes in a controlled manner between different species. Since its invention in 1974, it has conjured up
images of hope and dread. Public opinion is mixed, but the general approachhas global support beyond the dreams of its pioneering scientists.
With the emergence of genomic sequencing, we have now mapped thehuman DNA, dozens of pathogens, and some disease vectors, for example,
Anopheles gambiae, the mosquito that carries malaria.17 Molecular entomology, the study of DNA and the proteins it encodes in insects, is emerging as aserious scientific approach to insect control.18
The United Nations Development Program (UNDP)/World Bank/WHO
Special Programme for Research and Training in Tropical Diseases (TDR)
addressed the concept of genetic control of insect vectors at a 1991 meeting on
use of genetically modified (GM) mosquitoes to replace disease vectors. TDR’s
Steering Committee for Molecular Entomology has outlined a three-pronged
approach towards developing genetically modified mosquitoes for malaria control, with similar approaches for dengue fever and Chagas’ disease.19
The paradigmatic genetic research design with GM organisms works out
genetic transformation of the insects in the laboratory and then tests their behavior and vector characteristics before releasing them into the environment. First
researchers study the host-parasite interaction. Then they develop methods totransform the vector. Human beings are at risk of harm from naturally occurring
pathogen-transmitting vectors. The primary purpose of the project to create
modified vectors is to reduce these risks to human beings. For these studies to be
successful, trials need to be conducted that demonstrate reduced risk comparedwith naturally occurring vectors before the modified vectors are released. Finally,
they look at population ecology and genetics. Except in cases where scientists
use sterile insects to replace the whole population to eliminate the species in anarea endemic for disease transmission, researchers explore mechanisms thatwould safely spread the new gene among vectors in the wild, eventually replacing the population of harmful vectors with non-harmful insects.20
Releasing GM insects raises questions the safety of the procedure. We
need to thoroughly investigate possible effects of introducing GM insects into
the environment and on other species. Issues regarding the desirability andmorality of humankind changing entire elements of nature are also legitimate
areas of ethical reflection.
While interested parties debate whether to use of funds to combat infectious disease using genomics and biotechnology or devote their limited funds

Ethical Aspects in Introducing GMOs for Public Health Purposes73

to implementing practical measures to curb vectors and pathogens in the field,
we find wide agreement that genetic modification of disease vectors will become a major strategy in the future.21

4. Intrinsic Ethical Issues of Genetic Engineering
Studies have compared ethical issues inherent in the process of genetic engineering compared to traditional methods of animal and plant breeding. In genetic engineering, we achieve more precise control of genetic transformations andaccomplish cross-species DNA transfer that would not ordinarily occur in nature.
DNA transfer does occur between species, sometimes even between
kingdoms, in nature. We know, too, that insects are subject to naturally occurring genetic flux. Genetic engineering does not accomplish results that would
never occur in nature. Because the DNA changes can be precisely designedwith a stated beneficial purpose, a targeted genetic change made through genetic engineering should be safer than naturally occurring fluctuations or mutations because the change occurs under more control and only after careful
deliberation of potential consequences. Still, public opinion surveys haveshown opposition to cross-species gene transfer.
Does genetic integrity of organisms in the ecosystem have an intrinsic
value that humankind ought not change? If we restrict genetic engineering to
intra-species changes, our work would mimic the natural ways that organisms
evolve changes in genetic structure, eliminating this ethical concern.
Other ethical issues raised address the telos (purpose) of an organism.
Teleology is the branch of moral philosophy that studies ultimate causes innature. A teleological explanation describes phenomena by their design, purpose, or final cause. Some philosophers believe that purpose and design, endowed by a Creator, exist in nature. Some philosophers believe that the ability
to alter the telos of an organism has profound implications, whereas others saythat altering the telos has little meaning in the context of human modificationof nature.22 If we believe that every organism has a purpose, then the telos is
an intrinsic characteristic, and genetic engineering alters the telos or beingnessof an organism. Whether changes and control through genetic engineering are
significantly different from changes made by human beings to animals andplants in farming and modern life is debatable. If we consider this issue in ahistorical context, we see that affluent cultures have controlled nature in significant ways, for example, through irrigation and sanitation projects. In somedeveloping countries, limited resources have limited the extent to which similar control has been feasible. The ethical issue focuses on whether, and to what
extent, human beings may legitimately exercise control over nature.23

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5. Animal Rights Concerns

An ethical concern in the discussion of animal welfare is whether animals suffer or feel pain. Those who believe that insects do not feel pain argue that manipulating insects has no intrinsic wrongness.24 For those who believe that
insects feel pain, even if we consider the idea of making so-called vegemals,
animals that do not feel pain, we are still manipulating life for human purposes
without considering the interests of the animal.25 Animal rights proponents’concern is that living organisms should not merely be treated as a means to theends desired by human beings. More ethical concern has been voiced aboutmodifying higher order animals, especially sentient ones, than about engineering insect vectors.
In addition to concern for so-called intrinsic characteristics (pain, sentience, consciousness), human society has also placed extrinsic value on someanimals. For example, some animals, such as the American eagle, are national
symbols, and some people express greater concern about harming them thanother animals. We also see biodiversity concerns regarding endangered species,
some of which have been expressed by the Convention on Biological Diversity.
While perhaps only followers of the Jain religion in India refrain fromkilling insects that are considered human pests on moral grounds, some others
might object to insects for other reasons. We wonder whether manipulatinginsects to eliminate disease vectors would be more acceptable to persons withthese ecocentric worldviews than traditional methods of insect control that
attempt to eradicate entire insect populations.
The total number of species affected by genetic modification of vectors
would be significantly less than the number of species affected by use of insecticides. Still some argue that we should not modify or eradicate even insects because human beings should not modify the ecosystem. Proponents of this view failto recognize that all human activity modifies the ecosystem in some way.

6. Consent from Trial Participants
The ethical principle of autonomy dictates that all research participants
should give informed consent before receiving any intervention that has areasonable risk of causing harm.26 Obtaining individual informed consent is
problematic in some developing countries,27 due to the limited resources andcommonly more paternalistic models of health-care delivery. Adequate investment of time and provision of suitable materials should mitigate these
problems and us to obtain informed consent from individuals at direct risk,even if the exact cultural interpretation of the informed consent process mayvary among countries.28
The risks may not just be those that arise directly from the ability of thevector to carry the target pathogen. There could be a negative impact on human health by altering the behavior of blood-feeding insects. In the case ofEthical Aspects in Introducing GMOs for Public Health Purposes75

insects that cannot be restricted to a designated geographic area because they
fly for example, the concepts of human subject and informed consent need to
be extended beyond focus on the individual.
Basic ethical issues pertain to vector collection and field studies. Manysuch studies have relied on a researcher waiting for a vector to land on a humanhost, and then capturing it, hoping to do so before the vector transmits the pathogen to the human bait. On ethical grounds, we question whether researchers
could design safer field study methods that do not expose human persons to risk.
The approach developed for population genetics studies may be useful
where the community and local authorities are involved in the decisionmaking process. Accepted protocol for informed consent requires researchers
to provide information to potential participants. Disseminating information
about the plans and progress of the project and obtaining the consent of any
person potentially affected by the release of transgenic insects would constitute ethical conduct of research trials, regardless of whether national guidelines mandate these procedures.
People who lack the means to express their preferences might be abusedby the lack of individual or community consent for research in anthropology
and epidemiology.29 In some cases, research forewent participatory dialogue
with the local community and neglected to inform participants of potential
risks of participation in the research. Often researchers did not seek informed
consent and did not offer benefit sharing.
If a study involves human beings, oversight by an ethics committee or Institutional Review Board (IRB) is wise. Increasing numbers of countries havecodified these requirements, charging researchers with specified legal responsibilities, typically about the conduct of research or clinical practice at the local
and national levels. The IRB usually requires that each human subject in a medical
trial give informed consent to be involved in the project.
An international consulting committee for TDR has published model operational procedures and ethical guidelines for the establishment of IRBs.30
These guidelines are not sufficient for the broad question of how to obtain
informed consent for a public health intervention involving thousands of persons where the benefits are not yet demonstrated. A project to introduce transgenic insects will need an ethics committee with a broad overview, while regional ethics committees to consider local issues.
To consider the issue at a local level, as required for obtaining appropriate informed consent, a local ethics committee (or IRB if associated with an
institution) open to the target communities is essential. Cultural differences
dictate differences in the way informed consent should be obtained.31 The
modified Declaration of Helsinki and the draft Council for International Organizations of Medical Sciences guidelines outline the accepted norm in international ethical guidelines.32 In cases involving bilateral research collaboration, researchers should adopt the most stringent ethical standards of participating countries, but doing so creates problems for populations with lower
literacy levels and different common sense social assumptions than the rich

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sponsoring countries. The ultimate decisions should be made by the local ethics committee based on the international standards.
Privacy issues arise when questionnaires containing personal data are
stored. For public health purposes, all information about individuals involved
must linked to other data, but to ensure privacy, the data should only be identifiable by a designated person who uses a coding frame entered into a computer
not linked to a network.
Some public health interventions have targeted children without obtaining informed consent. Proponents of these procedures have claimed a therapeutic
imperative that presumes children are incompetent to give informed consent, but
if they had the capability to understand what is good for them, would want to be
involved in programs that would assist them to avoid disease. Critics havecharged that in these cases, researchers should obtain informed consent fromparents or legal guardians before they subject their children to any interventions.
In family settings where interventions might affect anyone in the family,
the question arises whether researchers should obtain informed consent fromevery individual family member. In these matters, researchers should consider
local cultural norms. In some cultures, every individual of reproductive age(mature adults) should be consulted. In those cases, family consensus and individual consent is appropriate.
Researchers should obtain agreement and understanding of children in
the community through suitable materials. An efficient way to reach parents
might be through communicating with children in schools. Since children are
at higher risk for many of the diseases under study, they stand to benefit more,
and most parents may want to be involved in the trial, because of the potential
benefit to their children instead of themselves. But children should not be exposed to direct risk from therapeutic trials unless no alternative exists. In acommunity involved in a GM vector trial, researchers would not expect any
direct risks to the human population. Normal procedures that do not require
additional consent from children could be applied.

7. Duty to the Community when Experimental Manipulations
Are done on the Environment instead of on Individuals
Because the control population for a study may also be at high risk of contracting the studied disease, recent research ethics debates have questioned whether
researchers have an obligation to the local population to use the best available
means of disease control whenever they enter an area for a study. Ethically, we
might need some other vector reduction measures when making any interventional study in an area. This thinking could lead to the conclusion that a researcher may ethically be compelled also to provide the best available provenalternative to the study population.
This might sound like an ethically compassionate approach, but one thatwould confound the research design. International guidelines’ treatment of pla-

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cebo-controlled trials, for example, the Declaration of Helsinki, have been basedon medical drug studies as the paradigm. This paradigm is not an apt one to apply to genetic research on disease vectors where the treatment involves altering
the environment instead of giving a specified drug to an individual. Provision of
the proven alternative to the area of study alters the dynamics of the disease sothat the results of the vector field trial differ from what the results would havebeen had no established alternative been provided. Such an approach would render any conclusions we draw about the experimental treatment questionable.

8. Environmental Risks and Public Consensus
A variety potential ecological and health risks are associated with the releaseof GM organisms. To date, researchers have reported successful environmental risk containment in over 10,000 field trials of GMOs released into theenvironment in a variety of countries.
We can consider environmental risk from either an anthropocentric or
ecocentric approach.33 Identified risks include the possibility of horizontaltransfer of the novel genes to non-target organisms and possible disturbance ofinsect ecology.34 Although human beings cannot consent for other organisms to bemodified per se, in scenarios where, in addition to effects on direct subjects, research trials can be expected to present potential harm to other non-human members of a biological community, or where interventions in the environment might
affect human beings residing in that environment, researchers should seek community consensus on the proposed intervention.
People evince variations across cultures in their beliefs about nature andlife.35 In some cultures, for example, in New Zealand, people have expressed
concerns over the need to preserve the native fauna and flora, which many in
the Maori community consider wrong to modify. Some people are willing tosacrifice themselves to protect the environment. Another example of this phenomenon is the preservation of sacred groves in India, done now for thousandsof years, even during times of severe crisis and human death. In this case, nearly
all the people of that community are willing to die instead of damage a part of theenvironment that they cherish. Such strong convictions often correlate with religious beliefs about spiritual life after physical death.36
Potential risks to the agricultural systems of rural communities also require assessment because animal diseases transmitted by vectors pose risks tofarming families. In addition, there may also be risks to wild animals in surrounding areas, which in some ecocentric environmental views have more intrinsic
rights to be left undisturbed than domesticated animals.37 This calls for broad ecological understanding of the ecological impact beyond public health.
Since 2001, researchers conducting trials of GM insects have instrumental in developing regulatory systems for oversight of GMOs/LMOs, but mostcountries in the world still have not established systems for oversight of GM
insect field releases.38

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Although many surveys have assessed public opinion about GMOs, few
surveys ask people about their views on introducing GM vectors or pathogens
for disease control. Survey results indicate that people consider GM plants lessrisky than GM microbes, animals, or human beings. GM insects for publichealth purposes appear to be intermediate in the scale of benefits and risk perception. A Japanese national sample collected in Japan indicated that 33 percent of the respondents thought use of genetic engineering to make mosquitoes
unable to be a vector for human diseases like malaria or Japanese encephalitis
would be acceptable; only 16 percent said it would not, but 50 percent said
they did not know. Another question showed 54 percent of respondents voiced
approval for environmental release of mosquitoes that do not transmit humandisease, and an approximately equal number supported release of GM diseaseresistant crops, with 19 percent disagreeing.39
Knowledge is a necessary but not sufficient condition for the acceptance ofbiotechnology. In surveys of scientists and the public in Japan between 1991 and
2000, for example, well-educated scientists were often as skeptical of biotechnology as the public were. They shared the same types of concerns.40
The failure of the government authorities to protect public health in casessuch as Mad Cow disease outbreaks has resulted in higher public trust of nongovernmental organizations (NGOs) such as environmental groups that often
lobby against genetic engineering. In addition, the media sometimes disproportionately reports negative aspects of genetic engineering because theserisks of technology appeal to the media and many people.41 As a result, the late
1990s saw a dramatic drop in public support for biotechnology in every country surveyed. We believe that all stakeholders, even opponents of scientificresearch, should be included in open dialogue about research priorities. But formeaningful informed decision making, reports of scientific activities should be
accurate and reported without bias.
The widespread effects of introducing GM vectors and pathogens into
the environment demands that the consent process be modified for a community model instead of on isolated individuals on which drug trial consent paradigms were developed. We need to tailor the process to each community inwhich we propose interventions.
The question of whether every citizen has to consent to public health interventions is not a new one, but with the current social transition from paternalistic societies to autonomous societies where informed consent and freechoice are valued, we see this ethical issue increasingly emphasized.42
Any initial trial proposal might be confronted with the “not in my backyard” philosophy. Socially powerful persons can be quite effective at blocking
trials they perceive to be risky, or, conversely, at attracting social resources
towards themselves and away from weaker persons in the community. Ethicalpractice requires equity in distribution of risks and benefits. One way to ensure this would be to commit to a local community that, if the trial were successful, the full-scale intervention would include them from the beginning. In
this way, populations willing to bear potential risks would receive compensa-

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79

tion in the form of early benefits when the full-scale safe and effective control program is implemented.
Finally, before they propose field trials to local communities, researchers
have first gained commitment that financial resources to conduct the research
will be available, and that that sustainable use of any control tool developed
will be affordable to them.

9. Ethics of Technology Choices
Some ethicists have debated whether we should concentrate limited researchdollars on developing technologies that rectify problems or on studies to learn
how to prevent those problems from occurring. Not all local communities will
share the modern scientific worldview that technical healing is desirable orbetter than other options. If we hope to gain their trust and willing cooperation, we need to be flexibility in which approaches we investigate to eradicate
disease. In the past, paternalistic interventions were imposed on citizens. Civilrights movements have empowered people to make these decisions independently.
International debates over the morality of obtaining patents have featured
several ethical issues such as the balance between benefit gained from intellectual property innovation rewards versus exclusive licenses for production of
producst. Critics have made strong calls against patenting medical innovations
because, in some cases, medical products have been priced well beyond themeans of many in the population to afford. Laws on intellectual property vary
between countries, despite attempts to harmonize these laws among industrialized countries and members of the World Trade Organization (WTO). Somedeveloping countries are not members of the WTO. Often whether a country
will join WTO hinges on intellectual property rights (IPR) issues.
Another concern voiced by some scientists and the public is that genetic
engineering is somehow unnatural. We need to examine this issue closely forconsistency with other expressed values. Presented with the threat of contracting disease or the need to combat disease already contracted, most people havefew concerns about using other unnatural remedies such as pesticides andpharmaceuticals. We could question whether opposition based on the practicebeing unnatural is consistent with other expressed values.
Given that most mosquitoes do not transmit disease to human beings,
we could argue that the natural state of a mosquito is one that does not act as
a disease vector. We could conclude, therefore, that modifying a mosquitothat does transmit diseases into one that does merely restores the mosquito’s
original nature.
The ethical principle of nonmaleficence, do no harm, should guide ourresearch activities and choices of technologies to develop. Concern over possible safety and environmental risks raised by biotechnology prompted WHO,the United Nations Environment Programme (UNEP), and the United Nations
Industrial Development Organization (UNIDO) to identify and study these80

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safety issues. As a result, a UNIDO/UNEP/WHO/Food and Agriculture Organization (FAO) ad hoc Working Group was formed in 1990 to work out
practical guidelines through a series of consultations with international experts
and scientists from developing countries. In 1991, the UNIDO/UNEP/WHO/FAO Working Group on Biosafety issued the Voluntary Code of Conduct for
the Release of Organisms into the Environment. UNDP and FAO generally
support the development of genetic technology as long as benefits and risks ofthe organisms are considered. Countries need to strengthen their ability to establish committees to adequately address ethical, social, and scientific concerns.
The Scientists’ Working Group on Biosafety of the Edmonds Institute in
Washington D.C., United States, recommended that field trials of vectors genetically engineered to reduce disease should be small scale in terms of thearea of dispersal of the vector:
In the case of an anti-malaria or anti-dengue intervention, such a fieldtrial could involve a single village or an isolated cluster of adjacent villages. No large-scale release should be attempted until the effectivenessis shown in the first trial.43
While participants in the United Nations system have reached consensus that
we should proceed with the prudently selected use of GMOs, some groups
within society continue to urge caution. Some countries have political regimesthat do not accept GMOs, and in democracies, the attitude of the government
depends in large part on a popular vote. Where two or more countries holdopposing opinions, another issue arises. While we should respect national sovereignty, GM vectors may spread beyond national borders.
The Cartagena Protocol on Biosafety was issued in January 2000, and effective September 2003, by the 1999 Conference of the Parties to the Convention on Biological Diversity (CBD) in Cartagena, Columbia. The objective of
the Protocol to the CBD is to contribute to the safe transfer, handling, and useof living modified organisms (LMOs), plants, animals, and microbes, thatcross international borders, and to avoid adverse effects on the conservationand sustainable use of biodiversity without unnecessarily disrupting world
food trade. The Protocol provides countries the opportunity to obtain information before new biotech organisms are imported. It acknowledges each country’s right to regulate bio-engineered organisms, subject to existing international obligations. It also creates a framework to help improve the capacity ofdeveloping countries to protect biodiversity. The Protocol also recommends
risk assessment and risk management once agreement to import biotech organisms is reached, and capacity building in biotechnology research.
Many developing countries do not have the economic or scientific capacity needed to evaluate the products of modern biotechnology.44 Based on
the Cartagena Protocol recommendations, CBD members have establishedbiosafety clearing houses that function as contact points in each member
country, whence this information can be obtained without incurring prohibi-

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81

tive monetary costs. We recommend that information about GM vectors
should also be included in these clearing houses.

10. Conclusion
A variety of ethical issues are raised in response to the use of GM insects, but
the most challenging may be how to ensure valid informed consent proceduresfor individuals and communities. Each community or society deserves the opportunity to reach consensus on how it values risk. We need a universal minimal standard of risk assessment applicable to disease vectors because diseases
cross national and continental borders.
Before field release of transgenic insects, researchers must assess all associated scientific and social issues and develop safety precautions to address
potential risks. They should minimize scientific and social risks through careful design of their research, relevant laboratory experience, and careful choiceof the dispersal site. Even if no significant risks are recognized before study
inception, a procedure for risk assessment should be set up so that new information can be gathered and interpreted. This procedure may involve establishing a specialized ethical review committee under the auspices of an international
body such as TDR to offer advice to researchers on the ethics of projects.
Prior environmental, medical, and social studies should form the basis forsite selection. Information should be exchanged as broadly as possible with
community leaders and members of the local community. Mass media andexisting educational institutions are two vehicles for information dissemination. Mechanisms to obtain individual and group consent need to be developed
for public health interventions and in trials where researchers make changes tothe environment that can affect members of the community.
One way to entice community involvement in field trials is to promisethat the community will be first to enjoy any benefits derived from the research. To avoid intellectual property concerns being a barrier to implementing public health measures using GM vectors or pathogens, prior negotiation
about intellectual property rights is preferable to confrontation.
Research data should be disseminated accurately and without bias to all
stakeholders to benefit from global expertise and to encourage international
consensus. We need an ongoing, active process of ethical analysis through avariety of forums. Researchers can allay most concerns by offering better information and education.
Ethically, we should identify core values that guide us as we research
how to modify nature in the service of human needs. The ethical principle ofbeneficence demands action to eliminate hunger and disease. We must balance
the need for technological advancement with our duty to protect and preserve
the environment for future generations.

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NOTES

1. Daryl R. J. Macer, Ethical, Legal, and Social Issues of Genetically Modified
Disease Vectors in Public Health (Geneva: UNDP/World Bank/WHO Special Programfor Research and Training in Tropical Diseases (TDR), 2003).
2. Darryl R. J. Macer, Bioethics is Love of Life (Christchurch, New Zealand:
Eubios Ethics Institute, 1998).
3. E. Azevedo and E. de Moraes Marcilio Cerqueira, “Decisions in Circumstances of Poverty,” Eubios Journal of Asian and International Bioethics, 12:4 (2002),
pp. 105–107.
4. John Rawls, A Theory of Justice (Cambridge, Mass.: Belknap Press, 1971).
5. A. Boyd, P. Ratanakul, and A. Deepudong, “Compassion as Common
Ground,” Eubios Journal of Asian and International Bioethics, 8 (1998), pp. 34–37.
6. Mae-Wan Ho, Genetic engineering: Dream or Nightmare? The Brave New
World of Bad Science and Big Business (Bath, UK: Gateway Books, 1998).
7. Convention on Biological Diversity (CBD), United Nations Environment
Programme, Cartagena Protocol on Biosafety (2001–2005), http://www.bio
div.org/biosafety/protocol.asp (accessed 31 July 2005). Contact: Secretariat of the Convention on Biological Diversity, 413 Rue Saint-Jacques, Ste. 800, Montreal, Quebec,
Canada, H2Y 1N9.
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