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Life Cycle. View Larger. Cysts are the stage responsible for transmission of balantidiasis . The host most often acquires the cyst through ingestion of contaminated food or water . Following ingestion, excystation occurs in the small intestine, and the trophozoites colonize the large intestine .
Balantidium coli life cycle Infection occurs when a host ingests a cyst, which usually happens during the consumption of contaminated water or food. [1] [6] Once the first cyst is ingested, it passes through the host's digestive system. [4]
Last Reviewed: May 26, 2023. Source: Global Health, Division of Parasitic Diseases and Malaria. Education and information about Balantidium coli, Balantidiasis, frequently asked questions, biology and publications.
Balantidium coli is an intestinal protozoan parasite that causes the infection called balantidiasis. While this type of infection is uncommon in the United States, humans and other mammals can become infected with Balantidium coli by ingesting infective cysts from food and water that is contaminated by feces.
Oct 23, 2023 · Balantidium coli is the largest protozoan and the only ciliate parasite that infects humans . EPIDEMIOLOGY. Human balantidiasis occurs worldwide; it is most prevalent in tropical and subtropical regions, including Latin America, the Philippines, Papua New Guinea, and the Middle East.
Balantidium has a simple life cycle, as follows: dormant cyst to trophozoite and trophozoite to cyst. Transmission is direct, from a contaminated water or food supply to humans (Fig. (Fig.1). 1). No intermediate host, as occurs with many other parasitic species, is needed.
Mar 17, 2015 · Balantidium coli, a large ciliated protozoan parasite. Life Cycle: Cysts are the parasite stage responsible for transmission of balantidiasis . The host most often acquires the cyst through ingestion of contaminated food or water . Following ingestion, excystation occurs in the small intestine, and the trophozoites colonize the large intestine .
