understanding giardia lamblia as a flagellated parasite in the microbial world of pathogens

giardia lamblia flagellated parasite microbiology pathogens waterborne diseases microbes infection health research gastrointestinal cyst human zoonotic epidemiology disease transmission organism parasites biology scientific study laboratory environmental sanitation prevention microscopy cells aquatic environment life cycle healthcare diagnostics treatment control studies public microbiota alternative medicine education awareness rate ecology impact immunology microbiological analysis sources