Giardiasis.
D000917:Antibody Formation; D001419:Bacteria / Q000302:isolation & purification; D003967:Diarrhea / Q000209:etiology; D005873:Giardiasis / Q000150:complications / Q000209:etiology* / Q000276:immunology; D006801:Humans; D007422:Intestines / Q000382:microbiology; D008286:Malabsorption Syndromes / Q000209:etiology