Enteric infection with an obligate intracellular parasite, Encephalitozoon cuniculi, in an experimental model
| Autor: | J. A. Shadduck, Konrad Wicher, Victoria Wicher, C Fuentealba, R E Baughn, Frank Abbruscato |
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| Rok vydání: | 1991 |
| Předmět: |
Immunoglobulin A
Time Factors Immunology Antibodies Protozoan Enema Antigen-Antibody Complex Kidney Microbiology Immunoglobulin G Immune system Antigen Administration Rectal Animals Lung Encephalitozoon cuniculi Protozoan Infections biology Intracellular parasite Brain biology.organism_classification Encephalitozoonosis Intestines Infectious Diseases Liver biology.protein Parasitology Rabbits Antibody Apicomplexa Research Article |
| Zdroj: | Infection and Immunity. 59:2225-2231 |
| ISSN: | 1098-5522 0019-9567 |
| DOI: | 10.1128/iai.59.7.2225-2231.1991 |
| Popis: | Rabbits were intrarectally infected with 3 doses (5 x 10(3), 5 x 10(5), and 5 x 10(7] of an obligate intracellular parasite, Encephalitozoon cuniculi, with or without prior colonic lavages. Although chronic administration of enemas seems to interfere to some degree with the intestinal translocation of the parasite, systemic infection was observed in both manipulated and nonmanipulated animals. The animals responded with antibodies of immunoglobulin A (IgA) and IgG isotypes, reflecting the route of infection. They also produced significant amounts of circulating immune complexes composed of IgA and IgG antibodies and E. cuniculi antigens. Lesions compatible with encephalitozoonosis were seen in the liver, kidney, lung, and brain. In all instances, nonmanipulated animals had more severe lesions than manipulated rabbits given the same dose of parasites. Levels of serum antibodies, circulating immune complexes, and histopathologic changes were associated with the infection dose. The presented data suggest that human microsporidiosis may also be transmitted via the rectal route. It is, therefore, of clinical relevance in view of several reports of microsporidian infections in patients with acquired immunodeficiency. |
| Databáze: | OpenAIRE |
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