the only cocidian protozoan not known to have an intermediate host. Humans act as the definitive host
Terms in this set (9)
Isosopora belli oocyst
elliptical or oval, immature form with a central mass and is non-infective. After maturation, the oocyst develops two sporoblasts
forms a sporocyst that contains four cigar-shaped sporozoites. A thick, double cell wall capsulates the sporocyst forming a mature infective form of the oocyst
humans act as the sole definitive hosts.After ingestion of the oocyst, the sporozoites are released. Infection takes place within the epithelial cells of the duodenum and jejunum. Asexual and sexual reproduction then proceed. Immature oocyst with the zygote is excreted in the feces. The maturation of the oocyst takes place in the environment.
asexual reproduction occurs with the formation of merozoites
sexual reproduction occurs with the formation of micro- and macro-gametes. The gametes then unite to form an immature oocyst that get excreted in the feces.
ingestion of contaminated food or water containing infective oocysts. Unprotected anal-oral sexual contact.
Infection is usually asymptomatic. If present, symptoms include diarrhea, anorexia, weight loss, abdominal pain
few examples include measuring oocysts, examining fecal specimens, intestinal biopsies
Treatment and prevention
metronidazole, tetracycline, good personal hygiene, and sanitary conditions