Exam 4 - Protozoan Parasites Flashcards
(17 cards)
What are the living, motile forms of protozoan called?
Trophozoite
What is the environmental transmission form of protozoan?
cyst/oocyst
What parasite is a single-cell flagellate protozoan parasite that is primarily associated with waterborne outbreaks? It causes watery diarrhea, voluminous, malodorous stools with a mushy consistency, gas, and flatulence.
Giardia sp.
When will Giardia sp. cysts be passed in the feces post-infection?
7-14 dyas
How are host infected/re-infected by Giardia sp.
fecal-oral contamination and ingetsion of immediately infective cysts
can have symptomatic or asymptomatic infectiond
What are the signs of Giardia sp. in humans?
Voluminous watery diarrhea
gas, flatulence, greasy stools that floats
abdominal discomfort, anorexia, nausea, vomiting, weight loss, fatigue
Symptoms appear 7-14 days post infection
Illness duration 2-6 wks
What parasite is flagellate protozoan parasite in LI of cats, is the causative agent of chronic diarrhea that has long duration but cat is otherwise normal. Causes Lymphoplamacytic/neutrophilic colitiis, crytp abcess, increased mucous production, and generalized erosion of colonic mucosa
Tritrichomonas blagburni
What parasite is a flagellate protozoan parasite in the repro tract of cattle, is the causative agent of bovine genital trichomoniasis. Bulls are generally asymptomatic and responsible for herd-level infections.
Tritrichomonas foetus
Clinical signs of Bovine Genital Trichomoniasis
Infertility
Spontaneous abortion in 1st trimester
Generalized repro tract infections
What are blood and tissue flagellates broadly classified as?
Trypanosomes
What two zoonotic diseases does trypanosomes cause?
African Sleeping Sickness
Chagas Disease
What is the causative agent of Chagas Disease or American Trypanosomiasis. Naturally endemic in Central and South America. Has a domestic (humans-bugs-humans) and sylvan (present in opossums, coons, and armadillos) lifecycle
Trypanosoma cruzi
What system (s) does Chagas Diseae affect
Spread by Lymphatic - affects multiple organs
What parasite infects macrophages of vertebrate hosts, Amastigote stages only (development occurs in Sand flys), is associated with multiple types of disease based on which sp.
Leishmania sp.
What Leishmania sp. is associated with visceral disease
L. donovoni, L. infeantum (syn. L. chagasi)
What Leishmania sp. is associated with muco-cutaneous disease
L. mexicana (New World)
What Leishmania sp. is associated with cutaneous disease?
L. tropica (Old World)
