### condition | illness | disease | communicable disease:

Infectious disease
* All infectious disease is caused by an infectious agent, for example a virus or a bacterium.
* Every infectious disease has an incubation period.
* Many infectious diseases are prevalent in a given geographic area but rare everywhere else
  - run rampant
* Most infectious diseases affect health
  - humans
* Most infectious diseases are caused by deadly microbes
  - germ
  - parasites
  - pathogen
  - cause breathe difficulty
  - come from domesticated animals
  - enter through the respiratory tract
  - have importance
* Most infectious diseases occur in developing countries
  - pass from person to person through physical contact
  - require attention
  - result from a microparasite
* Pinpointing the primary cause of browning is important.
* Some infectious diseases affect brains
  - desert tortoises
* Some infectious diseases afflict slave women
  - are carried by carnivores
* Some infectious diseases are caused by bacteria
  - pathogenic bacteria
  - protozoans
  - characterized by growth
  - have no treatments that work well
  - occur in foxes
* Some infectious diseases threaten chimpanzees
  - sea turtles
* affecting both the skin and internal organs are very common.
* are a cause of high morbidity, mortality and economic burden on society
  - huge source of illness
  - leading cause of death among infants
  - major cause for losses in broiler production
  - public health concern world-wide
  - special case of environment and genetics working closely together
  - also on the rise
  - by far the most common
  - germs
  - currently more resistant to treatment by antibiotics
  - important milestones in the development of children
  - indeed drivers of sexual reproduction and thus evolution
  - largely under control
  - major barriers to economic and social development
* are now the third leading cause of death in the United States
  - world's biggest killer of children and young adults
  - one of the leading causes of death
  - practically unknown
  - quite rare
  - still the leading cause of death worldwide
  - survivors
* are the leading cause of death in the world
  - world-wide, accounting for a third of all deaths
  - number one cause of human death worldwide
* are the world's leading cause of premature death
  - twelve times higher than the Australian average
  - widespread and maternal mortality is high
* attack our weakest or most susceptible organs.
* can be key drivers shaping local community structure and biodiversity
  - cause mental illness by way of a number of mechanisms
* can spread like wildfire
  - rapidly via global travel
  - major problems for individuals and communities throughout the world
  - public health problems in humans and animals
* caused by bacteria, viruses and parasites are a primary concern in aquaculture.
* continue to pose a serious public health threat worldwide.
* exploit the varied nature of lifestyle.
* is by far the greatest cause of morbidity and mortality world-wide
  - one of the major problems in shrimp aquaculture
* is the leading cause of human death worldwide
  - second major threat that global warming poses to human health
* kill more people worldwide than any other single cause.
* large cause of pain and death.
* major cause of death in neonatal foals.
* occur in humans
  - when an organism evades the immune responses meant to contain it
* permeate international barriers.
* play a major role in the health of the developing world.
* pose a serious threat and require research on vaccines and treatments.
* pose constant threats to the agricultural industry and society
  - livestock industry and to society
  - one of the most significant threats to successful aquaculture
* reach pandemic levels.
* remain among the leading causes of death worldwide
  - world's leading causes of death
  - central determinants of the health and development of all populations
  - leading killers in the U.S. and abroad
  - major causes of illness, disability, and death
  - serious public health problems in the tropics and semitropics
* remain the leading cause of death and morbidity on our planet
  - in developing nations
* remain the world's leading cause of death
  - single most common cause of death
* represent one of the most important challenges facing medical research.
  - international attention
* significant factor in the successful development of aquaculture.
* spread easily in the close contact of a college campus.
* takes a tremendous toll on people and on the U.S. economy.
* tend to spread where large groups of people gather together.
+ Infection, Treating infectious disease: Infectious diseases :: Microbiology :: Parasitism
  * Some infectious diseases have no treatments that work well. For example, there is no medicine that works well to cure West Nile Virus and Rabies. So it is important to avoid getting these diseases.