Nematodes Intro Flashcards
1
Q
What is an aberrant host?
A
a host which is not a normal host for the parasite
2
Q
What is a predilection site?
A
it is the preferred site in or on the host
3
Q
What class is roundworms in?
A
nematodes
4
Q
What are characteristics of adults that can be used for identification?
A
size, host, location in host, modifications of buccal capsule, and the existence of a bursa are particularly useful.
- shape of bursa and spinicules (male organs), and shape and size of vulva modifications
- integument, pseudocoel (body cavity), alimentary tract and reproductive tract (when in X-section)
5
Q
What are the general identifying characteristics of nematodes?
A
- Free living or parasitic
- Usually unsegmented, elongated and cylindrical in shape
- A complete alimentary canal is present
- Sexes are usually separate and the females are generally larger than males
6
Q
What are the diagnostic stages used for identification during necropsy?
A
- At necropsy -> adult worms, sometimes larval stages as well.
7
Q
What are the diagnostic stages used for identification on a live animal?
A
- eggs in feces,
- L1 in feces, vomit or blood,
- sometimes adult parasites in vomit and feces
