The diarrhea in calves, caused by Salmonella spp., provocates serious economic damage to cattle farming. This study aimed was to verify the occurrence of diarrhea and the isolation of strains of Salmonella spp. in diarrheal feces of calves from farms located in the Sertão from the state of Alagoas municipalities, and to characterize the in vitro resistance profile of Salmonella spp. isolated against conventional antimicrobials. The study was carried out with 431 calves from 10 to 90 days old. Of the total number of animals evaluated, 111 presented a diarrhea table, being analysed 111 samples of diarrhoeal faeces. The samples were sown in enrichment broths and selective culture media and the phenotypic and molecular characterization were performed. Among the animals evaluated, 25.75% (111/431) had diarrhea. The presence of Salmonella spp. was evidenced in 13.33% (2/15) of the studied establishments. Have been isolated 2.71% (3/111) strains of Salmonella spp. and have all been shown to be resistant to Cefotaxime and sensitive to Ciprofloxacin, Gentamicin, Amoxicillin, Ampicillin and Norfloxacin. Salmonella spp. and other infectious agents associated with diarrhea were confirmed in calves in the Sertão Alagoas mesoregion. The antimicrobial potential of the tested drugs reinforces the importance of their responsible and judicious use in the treatment of Salmonellosis, not being indicated the antibiotic therapy with Cefotaxima. The treatment based on Gentamicin, Amoxicillin, Ampicillin, Ciprofloxacin and Norfloxacin in the treatment of these animals, is recommended.
O objetivo do estudo foi verificar a inibição in vitro de Salmonella spp. a diferentes tipos de extratos de plantas com indicações medicinais em diferentes diluições de etanol. Para isso, foram obtidas 12 partes de plantas, entre folhas e caules, que fazem parte da terapêutica popular de toxinfecções gastrintestinais da mesorregião de Alagoas, Brasil, e que estão presentes na Mata Atlântica. Essas plantas foram submetidas à procedimentos de secagem, trituração, maceração e prensagem, permitindo diferentes concentrações de extrato. As amostras de Salmonella spp. testadas são oriundas de bezerros de propriedades rurais da região que apresentavam quadros de diarreia e que foram devidamente detectadas por testes bioquímicos e moleculares. Para verificar a sensibilidade, foi realizado o teste de Disco Difusão em Placas com três estirpes de Salmonella spp., sendo substituídos os discos com antibióticos por discos de extratos etanólicos nas concentrações de 10, 100, 500 e 1000mg/L. Como resultado, a folha de Varronia multispicata, popularmente conhecida como Cavarucaá, apresentou resultado positivo na inibição dos três isolados de Salmonella spp. nas concentrações de 500 e 1000mg/L. Os demais extratos não revelaram resultados de sensibilidade in vitro com a bactéria, em nenhuma das concentrações. Mais estudos com Varronia multispicata precisam ser desenvolvidos, com diferentes métodos de obtenção dos fitoconstituintes e com outras estirpes de Salmonella spp. da região.
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