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Parasitic infection of humans in the developed countries

Christine A Sundermann sundeca at mail.auburn.edu
Fri Apr 21 10:30:45 EST 1995

On 21 Apr 1995, Steve Meshnick wrote:

> 	That depends on how you define "parasite" (see other thread....).  There
> has been a lot of interest, here in the U.S. in Toxoplasma gondii,
> Cryptosporidium, and Pneumocystis carinii in AIDS patients (although the
> latter is a fungus and not classically a parasite.  I think of parasites
> as "those bugs discussed in parasitology textbooks", i.e. protozoa and
> helminths).   These are three of the most common opportunistic infections
> in AIDS patients.
> 	The only other parasite I know of that is associated with AIDS is
> leishmaniasis.  People have looked for an association between AIDS and
> malaria, and the only association has been that malaria during pregnancy
> appears to promote verical transmission of HIV.  I think that people have
> looked for an association between AIDS and Strongyloides and not found
> any.
> 	One interesting association has been postulated.  Helminth infections
> stimulate Th2-type immunity, and HIV may have a preference for Th2
> T-cells.
> Steve Meshnick
> University of Michigan

Additional Note:  Lately there has been increased interest in 
microsporidia in humans, particularly AIDS patients.  See papers by Canning
et al., and Cali et al., for more information.

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