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3d, abdominal, background, biology, cell, colour, dangerous, diarrhea, digestive, disease, duodenalis, duodenum, flagella, giardia, giardiasis, human, ileum, illustration, infection, infectious, intestinal, intestinalis, intestine, invasion, jejunum, lamblia, lambliasis, medical, medicine, microbe, microbiology, microorganism, microscope, microscopic, microscopy, parasite, parasites, parasitic, parasitology, poster, protozoa, protozoan, science, scientific, small, stomach, system, trophozoite,