Parasites - Tissue Protozoa Flashcards
Toxoplasma gondii infectious stage
Intermediate hosts in nature (including birds and rodents) become infected after ingesting soil, water or plant material contaminated with oocysts
Eating undercooked meat of animals harboring tissue cysts
Consuming food or water contaminated with cat feces or by contaminated environmental samples (such as fecal-contaminated soil or changing the litter box of a pet cat)
Blood transfusion or organ transplantation
Toxoplasma gondii diagnostic stage
Usually achieved by serology, although tissue cysts may be observed in stained biopsy specimens
Of congenital infections can be achieved by detecting T. gondii DNA in amniotic fluid using molecular methods such as PCR
Toxoplasma gondii info
stray cats and climate favoring survival of oocysts and soil exposure
women of childbearing age
eating raw or undercooked meat
Toxoplasma gondii classification
Tissue protozoa - coccidia
Naegleria fowleri infectious stage
trophozoite
Naegleria fowleri diagnostic stage
Trophozoites in CSF and brain tissue
Flagellated forms occasionally in CSF
Naegleria fowleri info
Primary amebic meningoencephalitis (PAM)
Naegleria fowleri classification
Tissue protozoa - Amoeba
Acantamoeba infectious stage
Trophozoite
Acantamoeba diagnostic stage
Cysts and trophozoites in tissue
Acantamoeba info
Granulomatous amebic encephalitis (GAE)
Acantamoeba classification
Tissue protozoa - amoeba
Trichomonas vaginalis infectious stage
Trophozoite in vagina or orifice of urethra
Sexual intercourse
Trichomonas vaginalis diagnostic stage
Trophozoite in vaginal and prostatic secretions and urine
Trichomonas vaginalis info
prevalence among persons with multiple sexual partners
