| Actually a picture of the Pinworm of the horse- oxyuris equi. |
Trichuris
- Whipworm found in the colon.
- Characteristic eggs are highly resistant.
- Common.
- Resistant to many anthelmintics.
- Egg containing L1= infective stage.
- Doesn't cause a problem.
Capillaria- see bird parasites.
Trichinella
- Wide range of hosts- carnivores.
- Zoonotic.
- Humans, pigs and horses.
- Wildlife reservoirs.
- No eggs or larvae in faeces and no free living stages.
Life Cycle
- Adults in the small intestine.
- Small & short lived.
- Females larviparous.
- L1 pass through the wall of the small intestine & encyst in muscles.
- Transmission occurs when muscle cysts are eaten.
- L1 released, adults mature, reproduce and die.
No disease in domestic animals, but serious disease in humans. Fever, oedema, muscle pains, peri-orbital oedema & myocarditis.
11 million cases worldwide affected by eating undercooked contaminated meat.
Control
- Meat inspection- automated muscle digestion systems.
- Cooking & freezing.
- Important reservoirs in wildlife.
No comments:
Post a Comment