### parasite:

Different parasite
* are transmitted to humans by many different methods.
* generate different antigenic fragments.

Ectoparasite
* are organisms which live on the skin surface of other organisms
  - parasites
* attach to outside of host.
* increase the cost of reproduction in their hosts.
* live externally on the host.
* live on the outer surface of humans
  - outside of a plant or animal
* quickly die in the absence of bats.
* remain in the soil and feed at the root surface.

Endoparasite
* enter roots and can live and feed within the root.
* exist within the host's body.
* live inside a plant or animal
  - the body of the host

External parasite
* Most external parasites cause irritation
  - problems
  - infest aquatic creatures
* Some external parasites affect goats
  - sheep
  - play roles
* are practically nonexistent, due to the cold temperature
  - rare on gerbils
* include ear mites
* includes mites and tics.

Fish parasite
* Most fish parasites are too small to be seen without the aid of a microscope
  - have complex life cycles often involving birds, snails, and microscopic animals
* Some fish parasites have oral suckers

Giardia parasite
* are among the most common intestinal parasites is the world
  - present in most western streams
* enter the body through food or water and multiply in the small intestine.

### parasite:

Internal parasite
* Many internal parasites live in cat feces.
* Most internal parasites are specific to one or two species.
* Most internal parasites cause infection
  - massive infection
* Some internal parasites cause similar symptoms
  - find in waterbucks
* are a major threat to the health, strength, and vitality of every horse
  - more difficult to diagnose
  - small organisms that live a portion of their life cycle in a host animal
  - the most common of problems in dogs
  - transmitted to humans from pets when the eggs are ingested
  - treated with the appropriate deworming medication
  - very common in kittens and puppies
* can also make a pet more susceptible to other diseases.
* can be a problem, especially with imported animals
  - serious problem in lambs and lactating ewes
  - have major effects on their hosts
* harm their hosts in many ways.
* have very sophisticated life cycles that can make treatment difficult.
* range from protozoans to roundworms and tapeworms.
* tend to infest older and younger animals most commonly.

### parasite:

Intestinal parasite
* Most intestinal parasites infest human vertebrates.
* Some intestinal parasites affect lambs.
* Some intestinal parasites cause diarrhea
  - giardiasises
  - intestinal symptoms
* are a far more common problem than most people realize
  - hidden problem
  - also common with people who have chronic fatigue syndrome
* are another common cause of bad breath, especially in puppies
  - problem plaguing many of the countries in the South China Sea
* are common in kittens
  - young ferrets and can potentially be spread to people
  - largely protein, the papain attacks it and causes parasite to die
  - prevalent
* are very common in many resource-poor countries
  - important cause of blood loss
* cause significant morbidity and mortality.

Larval parasite
* Most larval parasites cause diseases.
* are most common, but eggs, pupae, and adults are targets, too.