lifecycle of toxoplasma gondii

adult animal animals biology blood cat caucasian causes cell concept contaminated cycle cyst danger definitive design disease dissemination female gondii health host human ill illness illustration infection ingestion inside intermediate intracellular invasion life lifecycle mammals medical medicine microbe microorganism obligate occurs oocyst oocysts parasite parasitic people person pregnant protozoan risk science sick sources toxoplasma toxoplasmosis transmission unicellular white woman