Protozoology: Ciliates and Other Intestinal Protozoans, Study Guides, Projects, Research of Medical Sciences

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PROTOZOOLOGY

(CILIATES AND OTHER

INTESTINAL

PROTOZOANS )

BY

A. AHMAD, MD

OBJECTIVES

 2. Discuss the life cycle of Balantidium coli  3. Discuss the life cycle of Blastocystis hominis  4. Enumerate the four morphological forms of Blastocystis hominis.

Ciliated Protozoans

CILIATED PROTOZOANS

Balantidium coli OTHER INTESTINAL PROTOZOANS: Blastocystis hominis

Balantidiasis

 Causal Agents  Balantidium (=Neobalantidium) (=Balantioides) coli, a large ciliated protozoan, is the only ciliate known to be capable of infecting humans.  It is often associated with swine, the primary reservoir host. Recent molecular analyses have suggested the need for taxonomic revision, and it is now sometimes referred to as Neobalantidium coli or Balantioides coli, although this nomenclature has neither been resolved nor widely adopted in the medical community.

Hosts

 Swine are the primary reservoir hosts.  Humans can also be reservoirs, and other potential animal hosts include rodents and nonhuman primates.