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Journal of Clinical Microbiology, August 1998, p. 2336-2338, Vol. 36, No. 8
New England Regional Primate Research Center,
Harvard Medical School, Southborough, Massachusetts
01772,1 and
Division of Infectious
Diseases, Tufts University School of Veterinary Medicine, North
Grafton, Massachusetts 015362
Received 2 February 1998/Returned for modification 23 April
1998/Accepted 11 May 1998
Enterocytozoon bieneusi is the most common
microsporidian parasite recognized in human patients with AIDS.
Recently, we identified a virtually identical organism causing a
spontaneous infection associated with hepatobiliary and intestinal
disease in simian immunodeficiency virus (SIV)-infected macaques. To
examine the natural history of the infection, we examined captive
rhesus macaques for E. bieneusi by PCR, in situ
hybridization, and cytochemical techniques. PCR performed on fecal DNA
detected enterocytozoon infection in 22 (16.7%) of 131 normal rhesus
macaques (Macaca mulatta), compared to 18 (33.8%) of 53 rhesus macaques experimentally inoculated with SIV. In normal rhesus
macaques, persistence of infection was demonstrated for up to 262 days
and was usually not associated with clinical signs. In six of seven
normal rhesus animals, E. bieneusi was detected
by PCR in bile obtained through percutaneous cholecystocentesis but not
by in situ hybridization performed on endoscopic biopsies of duodenum
and proximal jejunum.
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Localization of Persistent Enterocytozoon bieneusi
Infection in Normal Rhesus Macaques (Macaca mulatta) to the
Hepatobiliary Tree
*
Corresponding author. Mailing address: Harvard Medical
School, New England Regional Primate Research Center, P.O. Box
9102, Southborough, MA 01772-9012. Phone: (508) 624-8183. Fax: (508) 624-8181. E-mail:
kmansfie{at}warren.med.harvard.edu.
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