Salmonella Paratyphi a in Hamsters Concurrently Infected with Schistosoma Mansoni *
| Autor: | Isis A. Mikhail, David C. Edman, Gene I. Higashi, Sabry H. Elwan, Noshy S. Mansour |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Male
Leishmania donovani Hamster Spleen Schistosomiasis Microbiology fluids and secretions Cricetinae Virology Paratyphoid Fever parasitic diseases medicine Animals Helminths Mesocricetus biology Salmonella paratyphi A Schistosoma mansoni biology.organism_classification medicine.disease Disease Models Animal Infectious Diseases medicine.anatomical_structure bacteria Parasitology |
| Zdroj: | The American Journal of Tropical Medicine and Hygiene. 30:385-393 |
| ISSN: | 1476-1645 0002-9637 |
| DOI: | 10.4269/ajtmh.1981.30.385 |
| Popis: | The present work deals with the development of an improved animal model to study the association of salmonellosis and schistosomiasis. The animal chosen was the hamster, Mesocricetus auratus, which can be readily infected with Schistosoma mansoni. Normal hamsters and schistosome-infected hamsters (SIH) were given approximately 2.0 × 107 Salmonella paratyphi A intracardially. It was found that S. mansoni infections enhanced and prolonged the growth of S. paratyphi A in hamsters. Animals with dual infections had increased mortality in comparison with those infected with just bacteria or parasite during the 50 days post-bacterial challenge. Further studies showed that in SIH, S. paratyphi A persisted in various organs for up to 8 weeks post infection. In contrast, concurrent Leishmania donovani infections have no effect on S. paratyphi A infections. Significant numbers of bacteria were cultured from well-washed schistosome worms recovered from SIH 6–8 weeks post-bacterial challenge. These findings suggest that a direct physical relationship between the bacteria and worms facilitates the establishment and growth of S. paratyphi A in vivo, and that a deficit in host immune response is not a major factor involved in the enhanced growth of S. paratyphi A. |
| Databáze: | OpenAIRE |
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