| Revista: | Pesquisa veterinaria brasileira |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000301441 |
| ISSN: | 0100-736X |
| Autores: | Pereira, Daniela I.B1 Riet-Correa, Franklin Ladeira, Silvia L |
| Instituciones: | 1Universidade Federal de Pelotas, Faculdade de Veterinaria, Pelotas, Rio Grande do Sul. Brasil |
| Año: | 2000 |
| Periodo: | Jul-Sep |
| Volumen: | 20 |
| Número: | 3 |
| Paginación: | 91-96 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | Several experiments were performed to demonstrate the role of Dermatobia hominis in the etiology of lechiguana: (1) One calf was infected simultaneously with Dermatobia hominis larvae and Mannheimia granulomatis. Biopsies were performed in two larval lesions. An eosinophilic lymphangitis with connective tissue proliferation, similar to those observed in lechiguana, were present in one biopsy. (2) To detect if Dermatobia hominis is a carrier of Mannheimia granulomatis, a bacteriologic study was performed in 72 larvae and the same number of exudate samples from larval lesions. The bacterium was not isolated. (3) In 9 cattle spontaneously infected by Dermatobia hominis, the larval lesions were inoculated with Mannheimia granulomatis. One bovine whose larval lesions were contaminated with bacteria developed a lechiguana 3 months after inoculation. (4) Two fibroproliferative lesions, clinically similar to lechiguana, caused by Dermatobia hominis larvae were studied. Histologically, these lesions were characterized by proliferation of fibrous tissue with focal granulomas. Eosinophilic lymphangitis and calcification of collagenous fibers were not observed in the lesions. As Dermatobia hominis occasionally produces a fibrogranulomatous reaction, it is possible that this can be the initial lesion for lechiguana, if infected by Mannheimia granulomatis. (5 and 6) Two experiments were performed to detect if healthy cattle can carry Mannheimia granulomatis. The bacterium was not isolated from the tonsils of 153 cattle, and the immunodiffusion t |
| Disciplinas: | Medicina veterinaria y zootecnia, Biología |
| Palabras clave: | Bovinos, Medicina veterinaria, Bacterias, Dermatobia hominis, Mannheimia granulomatis, Etiología |
| Keyword: | Veterinary medicine and animal husbandry, Biology, Bovines, Veterinary medicine, Bacteria, Dermatobia hominis, Mannheimia granulomatis, Etiology |
| Texto completo: | Texto completo (Ver HTML) |
