Deck 10 Flashcards
Which antibodies form the basis of humoral immunity? Please explain their function during parasitic infection
by B lymphocytes and B lymphocyte derived plasma cells, producing antibodies (IgM, IgG, IgA, IgE…)
Diagnosis of trypanosomes (Trypanosoma cruzi) is based on:
hematocrit centrifuge technique
Which diagnostic method is used for detection of Leishmania spp. in dogs?
serological detection of specific antibodies and PCR with biopsy specimens from skin and popliteal lymph nodes
Explain how muscle cysts form in the intermediate host during Sarcocystis tenella infection. State accurately and specifically.
After schizogony in IH merozoites release and invade muscle cells where they form a cyst containing bradyzoites (endodyogony) this sarcocyst is nthe infective stage for the FH
Typical pathological finding of histomonosis is
hard, cheesy plugs like exudate in caecal lumen
In case of infection, the so-called pseudo cysts of Toxoplasma gondii, write what is the infected stage? Specify the type of hosts they are created for.
Tachyzoit : rapidly growing meront or zoit observed in the early stage of infection (endopolygony), localization intracellulary and free form pseudocysts in IH
IH= dogs, Ru, pigs, horses, poultry
What is the infectious stage of Hepatozoon canis? How does this pathogen spread?
Dog is infected by ingesting an infected tick
The tick(FH) is infected by ingestion of neutrophils with gamonts during blood meal
How does a turkey become infected with the parasite Leucocytozoon smithi?
Infected insect bites birds, FH and vector are black flies and Infective sporozoites present in salivary gland of infected insect vector = infectious stage
Dormozoites are:
sporozoites persisting intracellulary without dividing
Prepatent period is:
time between entry of the infective stage to the final host and the development to the adult stage
suffix of suborder:
ina
Which species of trypanosoma in human ?
T. Rhodensiense, T. Gambiense, T. Cruzi
Trypanosoma congolense belongs to :
Ru, Eq
Why isn’t there a vaccine against trypanosoma species?
Development of resistant species which shortens vaccine activity
what stage of trypanosoma cruzi multiply in man:
trypomastigote & amastigote
