292
edits
Changes
no edit summary
There are just three genera of veterinary importance:
There are just three genera of veterinary importance:
#''Trichuris'' (the whipworms)
#''Capillaria''
#''Trichinella''
== ''Trichuris'' Species ==
== ''Trichuris'' Species ==
*The whipworms have a stout posterior end and a long narrow neck, which is superficially inserted into the caecal mucosa. *Eggs are brown, barrel-shaped, with a plug at either end, and can survive for up to 12years.
*The whipworms have a stout posterior end and a long narrow neck, which is superficially inserted into the caecal mucosa
*The infective stage is the embryonated egg.
*Eggs are brown, barrel-shaped, with a plug at either end, and can survive for up to 12 years
*The life-cycle is direct.
*The infective stage is the embryonated egg.
*After the egg is swallowed, the larva initially forms a mucosal nodule before emerging into the lumen.
*The life-cycle is direct
*After the egg is swallowed, the larva initially forms a mucosal nodule before emerging into the lumen
== ''Capillaria'' ==
== ''Capillaria'' ==
*Similar to ''Trichuris'', but the difference between anterior and posterior ends of the body is not so pronounced.
*Similar to ''Trichuris'', but the difference between anterior and posterior ends of the body is not so pronounced
*Some species have direct life-cycles, others use intermediate or transport hosts.
*Some species have direct life-cycles, others use intermediate or transport hosts
*Species have different predilection sites.
*Species have different predilection sites
*Of greatest importance in birds, species do occur in the urinary bladder and liver of cats and dogs.
*Of greatest importance in birds, although species do occur in the urinary bladder and liver of cats and dogs
== ''Trichinella'' ==
== ''Trichinella'' ==
*This is known as the "worm that thinks its a virus".
*This is known as the "worm that thinks its a virus"
*It is a unique genus, and an important zoonosis.
*It is an important zoonosis
*It is covered in greater detail