Resumo
The study was carried out to screen and analyze the genetic characteristics of antimicrobial resistance in Campylobacter spp. from poultry sources. A total of 141 strains of Campylobacter isolated from samples of broilers of slaughterhouses in southern Brazil was identified by phenotypic and genotypic methods. Campylobacter isolates were evaluated for its antimicrobial susceptibility and the presence of resistance genes. The strains were investigated for antimicrobial susceptibility against two agents (ampicillin and tetracycline) by disk diffusion method. PCR assay was used to confirm the specie and the presence of ampicillin (blaOXA-61), tetracycline tet(O), and the energy-dependent multi-drug efflux pump (cmeB) genes. Campylobacter jejuni was the most ubiquitous; its presence was determined in 140 samples out of 141 (99.3%), whereas Campylobacter coli was found only in one of the contaminated samples (0.70%). The results obtained showed 65% and 35.5% of Campylobacter isolates resistant to β-lactams and tetracyclines, respectively. The cmeB gene responsible for multidrug resistance was detected in 26 isolates out 141 strains (18.5%). Moreover, 36 out of 141 Campylobacter strains (25.6%) were found to be resistant to at least two different antimicrobia resistance markers (β-lactams and tetracyclines).(AU)
O presente estudo foi realizado para examinar e analisar as características genéticas de resistência antimicrobiana de Campylobacter spp. a partir de fontes avícolas. Um total de 141 amostras de Campylobacter isolados em matadouros-frigoríficos de aves do estado do Rio Grande do Sul, Brasil, foi identificado por métodos fenotípicos e genotípicos. Foi analisada a susceptibilidade antimicrobiana e a presença de genes de resistência. As cepas foram testadas para detectar sensibilidade frente a dois antimicrobianos (ampicilina e tetraciclina) pelo método de difusão em disco. A seguir, usando a reação em cadeia da polimerase foi confirmada a espécie e a presença dos genes de resistência à ampicilina (blaOXA-61) e tetraciclina tet(O), assim como a detecção da bomba de efluxo (cmeB). Campylobacter jejuni foi a espécie mais isolada, sua presença foi determinada em 140 amostras (99,3%), e Campylobacter coli foi encontrada em uma única amostra (0,70%). Os resultados obtidos mostraram 65% e 35,5% de Campylobacter isolados resistentes a β-lactâmicos e tetraciclinas, respectivamente. O gene cmeB responsável pela resistência a múltiplos antimicrobianos foi detectado em 26 amostras (18,5%). Neste contexto, 36 das 141 amostras (25,6%) foram consideradas resistentes a dois grupos diferentes de antimicrobianos (β-lactâmicos e tetraciclinas).(AU)
Assuntos
Animais , Campylobacter/patogenicidade , Tetraciclina/administração & dosagem , beta-Lactamas/administração & dosagem , Galliformes/microbiologia , Matadouros , Resistência a Medicamentos , Reação em Cadeia da Polimerase Multiplex/veterináriaResumo
A severe cutaneous reaction in a female dog after administration of penicillin and cephalexin is described, in which the main signs presented by the patient were fever, lack of appetite, and detachment of epidermis in the dorsal region of body.The established treatment was surgical debridement of the region, topical application of Aloe Vera with sugar, and systemic antibiotic therapy with ciprofloxacin, resulting in the recovery and wound closure in approximately 45 days.(AU)