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 ORIGINAL ARTICLE
Year : 2007  |  Volume : 25  |  Issue : 3  |  Page : 209-213

Immune responsiveness associated with experimental Encephalitozoon intestinalis infection in immunocompetent rats


1 Department of Biological Sciences Federal University of Technology Minna, Nigeria
2 National Veterinary Research Institute Jos, Nigeria

Correspondence Address:
ICJ Omalu
Department of Biological Sciences Federal University of Technology Minna
Nigeria
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0255-0857.34760

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Purpose: Microsporidial infections have been recognized as an increasingly important infection in immuncompromised patients, particularly those infected with HIV/AIDS. This study was designed to study immune responses associated with experimental Encephalitozoon intestinalis infection in immunocompetent rats. Materials and Methods: Thirty-four Rats in 3 groups, A (Control), B (Intraperitoneal) and C (Oral) were given injections of 0.5 ml of 2 x 10 6 of purified spores of Encephalitotozoon intestinalis spores and were observed for serum specific IgG for 21 days using both direct and indirect ELISA. Results: In indirect ELISA, specific lgG were detected on days 7, 14 and 21 for the group B rats and on day 21 for group C and in direct ELISA method, specific lgG were detected in-group B rats on days 7 and 21, for group C rats on day 21 only, while in the control rats, specific lgG were not detected. There was no significant difference between the direct and indirect methods (df=1, X 2 , P>0.05). E. intestinalis was observed in stool samples of rats in 1/12 (08.33%) on days 14 and 21 in group B, and in 4/10 (33.33%), 3/10 (25.00%) and 2/10 (16.67%) on days 7, 14 and 21 respectively in group C. In group A, which is the control rats, no microsporidia were observed on days 0, 7, 14 and 21. Conclusions: There were no changes in the T-lymphocyte counts of rats prior to and after inoculation with spores. Extensive lesions were observed along the intestinal walls especially on the middle and lower sections of group C rats only.






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2004 - Indian Journal of Medical Microbiology
Published by Wolters Kluwer - Medknow

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