University:
Eastern Kentucky University
Course:
BIO 273 | Clinical Microbiology
Academic year:

2022
Views:

40

Pages:

2
Author:

folclord7m

Giardia Features: Common in travellers and campers who travel to endemic areas Transmission: 1. Fecal-oral route a. Drinking water contaminated with animal or human feces having cysts of giardia Life Cycle: Life cycle consists of two forms: 1. Cysts form a. Infectious form b. Transmitted through contaminated water 2. Trophozoite form a. Flagellated b. Ventral sucking discs c. Attach to mucosal membrane but do not invade Diseases: 1. Giardiasis a. Bloating b. Flatulence c. Diarrhea i. Foul-smelling ii. Steatorrhea (fatty diarrhea) 1. Giardia stimulates excessive mucus production which impairs absorptive capacity of intestine 2. Impaired absorption of fat soluble vitamins (ADEK) d. Weight loss Lab Diagnosis: 1. 2. 3. 4. Trophozoites in stool Stool O&P (ova and parasite) Cystic form in stool ELISA stool antigen test Treatment: Metronidazole (4) Trophozoites and cysts released through stools (trophozoites die in the external environment) (1) Cysts in contaminated water (3)Trophozoites are released from cysts into the gut and cause diseases (2) Consumed by human