Order Strongylida Flashcards
subfamily strongylinae common name:
large strongyles
subfamily Cyathostominae common name:
small strongyles
hosts
all horse species
size of adult Strongylinae
1.5-5 cm
size of adult Cythanostominae
less than 1.5 cm
size of Strongylinae egg
60-120 x 35-60 micrometers
size of Cythanostominae egg
60-120 x 35-60 micrometers
development of Strongylinae
migrate through organs
development of Cythanostominae
encyst in intestinal walls
do Strongylinae have anthelmintic resistance?
No- can be controlled by them
Do Cythanosominae have anthelmintic resistance?
yes
characteristics of superfamily strongyloidea
buccal capsule well developed all mouth capsules are globular!! teeth usually present direct life cycle L3 is infective stage
what are the large strongyles?
Strongylus vulgaris
Strongylus edentatus
Strongylus equinus
large strongyles are _____
bloodsuckers
greater than ____ species of cythanostominae
50
Cythanosominae cause _____
diarrhea
mouth capsule of Cythanostominae
rectangular
Cythanostominae site of infection
large intestine
Cythanostominae pathogenesis
Larval cyathostominosis, lymphocytic infiltration, colitis
clinical signs of Cythanostominae
mainly associated with L4
chronic diarrhea and weight loss
Cythanostominae diagnosis
fecal examination, distinguish larvae of small vs. large strongyle
treatment of Cythanostominae
BZ’s and MCL’s
prevention of Cythanostominae
manage pasture, treat animals, clean up feces, mixed grazing, do not overstock
large strongyles have longer ____
PPP
large strongyles are _____ common
less
which large strongyle is most pathogenic?
Vulgaris
which large strongyles cause anemia?
Edentatus and Equinas
do all horses have small strongyles?
yes
in small strongyles emergence of ____ is most damaging
L4
