alexa Cerebral Microsporidiosis Caused by Encephalitozoon cuniculi Infection in a Young Squirrel Monkey | OMICS International | Abstract
E-ISSN: 2314-7326
P-ISSN: 2314-7334

Journal of Neuroinfectious Diseases
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Case Report

Cerebral Microsporidiosis Caused by Encephalitozoon cuniculi Infection in a Young Squirrel Monkey

K. Furuya1*, H. Sugiyama1, M. Ohta2, S. Nakamura2, Y. Une2, and S. Sasaki3

1Department of Parasitology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan

2Laboratory of Veterinary Pathology, Azabu University, 1-17-71 Fuchinobe, Sagamihara, Kanagawa 229-8501, Japan

3Kashima Laboratory, Mitsubishi Chemical Medience Corp., 14 Sunayama, Kamisu, Ibaraki 314-0255, Japan

*Corresponding Author:
K. Furuya
Department of Parasitology
National Institute of Infectious Diseases
1-23-1 Toyama, Shinjuku-ku
Tokyo 162-8640, Japan
E-mail: [email protected]

Received Date: 7 July 2011; Accepted Date: 19 July 2011

Abstract

This is a case report of cerebral microsporidiosis found in a young squirrel monkey (Saimiri sciureus) in a colony located in Japan, which probably died of yersiniosis due to Yersinia pseudotuberculosis infection. The microsporidia, Encephalitozoon cuniculi, was detected in the brain of the yersiniosis-diseased monkey and was further characterized as a genetically unique type of strain III. The agent was microbiologically and genetically undetectable in other organs tested. Gram-positive organisms, which were confirmed immunohistochemically as Encephalitozoon spp. including mature spores, were histologically detected in pseudocysts formed inside neurons and in neuropils. Reactions in the surrounding tissue were not observed for most parasitized lesions. Neurons in the brain of younger hosts might provide a site for latent and active infection by E. cuniculi.

This is a case report of cerebral microsporidiosis found in a young squirrel monkey (Saimiri sciureus) in a colony located in Japan, which probably died of yersin-iosis due to Yersinia pseudotuberculosis infection. The microsporidia, Encephalitozoon cuniculi, was detected in the brain of the yersiniosis-diseased monkey and was further characterized as a genetically unique type of strain III. The agent was microbiologically and genetically undetectable in other organs tested. Gram-positive organisms, which were confirmed immunohistochemically as Encephalitozoon spp. including mature spores, were histologically detectedin pseudocysts formed inside neurons and in neuropils. Reactions in the surrounding tissue were not observed for most parasitized lesions. Neurons in the brain of younger hosts might provide a site for latent and active infection by E. cuniculi.

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