giardia genus of anaerobic flagellated protozoan parasiiardiasis. giardiasis. giardia intestinalis protozoan

graphic vector microscope infecting poster system parasitology scientific infectious medicine colon structure microbiology microscopic anatomy abdominal microorganism human parasitic duodenalis intestinal cell infection disease biology science medical flagellated parasite small intestine giardiasis 3d illustration giardia genus anaerobic protozoan parasiiardiasis intestinalis lamblia life cycle trophozoite infective resistant cyst phylum metamonada