Longitudinal study of Salmonella spp., diarrheagenic Escherichia coli, Rotavirus, and Coronavirus isolated from healthy and diarrheic calves in a Brazilian dairy herd
| Autor: | Fernanda Morcatti Coura, Marcos Xavier Silva, Juliane Ribeiro, Antônio Último de Carvalho, Marcos Bryan Heinemann, Amauri Alcindo Alfieri, M. D. Freitas, Elias Jorge Facury Filho, Cecília de Souza, Raquel Arruda de Leme, Andrey Pereira Lage |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Rotavirus
Diarrhea Salmonella Virulence Factors Cattle Diseases Biology medicine.disease_cause Calf diarrhea Microbiology Feces fluids and secretions Food Animals medicine Escherichia coli Animals Longitudinal Studies Prospective Studies Escherichia coli Infections Bovine coronavirus Coronavirus Coronavirus Bovine Salmonella spp Herd Animal Science and Zoology Cattle medicine.symptom Coronavirus Infections SALMONELOSE ANIMAL Brazil Regular Articles |
| Zdroj: | Tropical Animal Health and Production Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1573-7438 0049-4747 |
| Popis: | This prospective longitudinal study investigated the epidemiology of enteric disease associated with infections in calves aging up to 70 days. A total of 850 fecal samples were collected from 67 calves. Seventeen isolates of Salmonella spp. were recovered from feces of 11 calves (16.4 %), and statistical analysis revealed no association between the presence of Salmonella spp. and clinical signs of diarrhea or age. Virulence factors of Escherichia coli were identified in 103 strains: eae (7), K99/STa (7), Stx1 (7), Stx1/eae (36), Stx1/Stx2/eae (2), Stx2 (43), and Stx2/eae (1). There was statistical association between diarrheic animals carrying E. coli Stx1/eae + in their feces at 2 and 4 weeks of age (P = 0.003) and E. coli Stx2 + at 5 weeks of age (P = 0.03). Rotavirus was detected in 49 (5.76 %) fecal samples collected from 33 calves (49.2 %). The presence of rotavirus was correlated with diarrheic feces (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink