Changes

There are just three genera of veterinary importance:

There are just three genera of veterinary importance:

1) '''Trichuris''' (the whipworms)

#''Trichuris'' (the whipworms)

 

#''Capillaria''

2) '''Capillaria'''

#''Trichinella''

 

3) '''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