Sunday, March 29, 2009

Waterborne toxoplasmosis - recent developments

Exp Parasitol. 2009 Mar 23. [Epub ahead of print]

Waterborne toxoplasmosis - recent developments

Jones JL, Dubey JP.

Division of Parasitic Diseases, National Center for Zoonotic, Vectorborne and Enteric Diseases, Coordinating Center for Infectious Diseases, Centers for Disease Control and Prevention, 4770 Buford Highway, MS: F22, Chamblee, Georgia 30341,USA.

Humans become infected with Toxoplasma gondii mainly by ingesting uncooked meat containing viable tissue cysts or by ingesting food or water contaminated with oocysts from the feces of infected cats. Circumstantial evidence suggests that oocyst-induced infections in humans are clinically more severe than tissue cyst-acquired infections. Until recently, waterborne transmission of T. gondii was considered uncommon, but a large human outbreak linked to contamination of a municipal water reservoir in Canada by wild felids and the widespread infection of marine mammals in the U.S.A. provided reasons to question this view. The present paper examines the possible importance of T. gondii transmission by water.

PMID: 19324041 [PubMed - as supplied by publisher]

1 comment:

ummicro said...

That is interesting. I wonder what the frequency of oocyst activity happens in the gut of infected animals [felines] I also wonder if this cycle can happen in human gut. If it only happens once a year, for example, how can researchers be sure sexual stage does not occur humans or other animals?