eggs of parasite in stool examination

abdominal albendazole animal ascariasis background biology diarrhea disease duodenum education female health healthy helminth human infection infectious intestinal intestine invertebrate isolated levamisole lumbricoides macro malnutrition medical medicine microscope microscopic nature nematoda nematode nematodes pain pamoate parasite parasitic research roundworm roundworms sanitation science swelling system tapeworm ugly white wildlife worm zoology