Ostertagia ostertagi Flashcards
1
Q
class
A
nematoda
2
Q
order
A
strongylida
3
Q
common name
A
brown stomach worm
4
Q
hosts
A
cattle
5
Q
ostertagia is important in _____ regions with winter rainfall
A
temperate and subtropical
6
Q
adult characteristics
A
slender
reddish brown
7
Q
size of adult
A
1cm
8
Q
larvae are _____
A
microscopic
9
Q
species differentiation based on _____
A
spicules in males
vulva in females
10
Q
egg characteristics
A
trichostrongyloid
oval
85micrometers
thin shelled
11
Q
life cycle direct or indirect?
A
direct
12
Q
life cycle
A
eggs pass in feces develop to L3 L3 migrate to herbage ingested by cow during grazing L3 develops in abomassal gland 2 molts occur adult emerges from the gland male and females mate females lay eggs
13
Q
if conditions are not favorable the ____ will arrest inside the host for up to 6 months
A
L4
14
Q
site of infection
A
abomasum
15
Q
pathogenesis
A
Caused primarily by L3 to immature adult in the gastric glands
Thickened gastric mucosa; raised nodules = “Moroccan leather”
Increased plasma pepsinogen
