Cryptosporidia and Giardia Flashcards
Transmission of cryptosporidium?
fecal-oral
C. parvum hosts
HUMANS, CATTLE, sheep, goats
C. hominus
for humans and monkeys
Can you kill crypto with bleach?
nope, it needs UV radiation or dessication, so it’s super hard to get rid of
Other crypto species
canis, felis, meleagridis, sepentis, etc. (so many)
Where in this image is the crypto?
it’s the purple dots on the surface of the villi (all at different stages)
Main symptom of crypto?
diarrhea (in calves and humans!)
Is sexual and asexual reproduction of crypto done in one host?
yes, all replication in one host!
Infective stage of crypto?
oocyst
Is crypto capable of autoinfection?
yes! after excystation, the four sporozoites can infect the intestinal epithelium where they’re released and repeat the process over again
acid fast staining of the cysts of cryptosporidium parvum
Location of crypto infection?
enterocytes of the small intestine!
Treatment for Crypto?
NO currently licensed treatments OR vaccines
infection is mild and self-limiting (1-2 weeks) in normal individuals
Clinical Signs of Crypto in Calves
main sign is scours, typically in calves 1-3 weeks old
also fever, dehydration, depression; if survive will stunt growth
Most important species of Giardia in veterinary medicine?
Giardia duodenalis
giardia trophozoite
