giardia lamblia protozoan, the causative agent of giardiasis

abdominal anatomy background biology body cell colon colour dangerous diarrhea digestive disease duodenalis duodenum flagella giardia giardiasis human ileum illustration infection infectious intestinal intestinalis intestine invasion isolated jejunum lamblia lambliasis medical medicine microbe microbiology microorganism microscopic parasite parasites parasitic parasitology poster protozoa protozoan science scientific small stomach system trophozoite