Sarcocystis spp Flashcards
hosts
dogs, cats, humans, other carnivores
intermediate hosts
cattle, herbivores, omnivores, birds
size
18 micrometers
sporocysts sporulate inside the ____ before being passed in the feces
intestine
sporulated oocysts contain
2 sporocysts each with 4 sporozoites
the life cycle includes _____ in the final host and _____ and _____ in the intermediate host
gametogony, schizogony, sarcocyst formation
what happens in the final host?
gametogony-
host ingests mature sarcocysts with bradyzoites in intermediate host
bradyozoites are liberated and differentiate into micro and macro gametocytes
fertilization of gametes forms oocysts
oocysts sporulate in the body
what happens in the intermediate host?
schizogony-
ingestion of sporocysts from infected final host
1st asexual generation- sporozoites release from sporocysts where they go into endothelial cells and undergo 2 schizogonous cycles
third asexual cycle in lymphocytes with resulting merozoites penetrating muscle cells
they encysts and bud and give rise to bradozoites in a cyst
what is the infective stage for the carnivorous host?
bradozoites contained within a cyst
PPP for carnivores:
7-14 days
how long does it take for ingested sporocysts to turn to bradyzoites in intermediate hosts?
2-3 months
site of infection
muscles in intermediate hosts, gastrointestinal tract in final host
pathogenesis
no illness in final host, but intermediate host may have serious or fatal disease
diagnosis
bradyzoites in muscle tissue of intermediate host or sporocysts in final host
treatment
cooking meat and preventing fecal contamination from final host
