'PGDesign / Universidade Federal do Rio Grande do Sul'
Abstract
Background: Bacterial resistance is a fundamental aspect of One Health, which is defined as the inseparable unity of animal, human, and environmental health. Epidemiological surveillance on the spread of bacterial resistance in animals and their derived products is essential given that meat, milk, and dairy products can carry resistant microorganisms that may reach humans through the food chain either by direct consumption or by handling the product. To eliminate the scarcity of information, it is necessary to characterize the epidemiological situation in terms of bacterial resistance in dairy production in northeastern Brazil. Thus, the objective of this study was to determine the frequency and antimicrobial susceptibility profile of bacteria isolated from goat milk samples from some municipalities in the Brazilian state of Sergipe.Materials, Methods & Results: The study included 28 goat farms in 4 municipalities of the Semiarid region of the State of Sergipe in Northeastern Brazil, namely Canindé de São Francisco (n = 11), Nossa Senhora da Glória (n = 6), Poço Verde (n = 6), and Porto da Folha (n = 5). All lactating does of each herd (n = 263) aged >1 year were, sampled randomly by non-probabilistic convenience sampling. Milk samples were collected from both teats, resulting in 526 samples in total.Bacterial culturing and isolation were performed, followed by antimicrobial susceptibility profile analysis to the following active principles: amoxicillin with and without clavulanic acid, amikacin, ampicillin with sulbactam, ciprofloxacin, cefalexin, cefalotin, ceftriaxone, chloramphenicol, doxycycline, enrofloxacin, gentamicin, levofloxacin, ofloxacin, penicillin G, and tetracycline. A survey form was used to obtain zootechnical information for each farm. Data are described as absolute and relative frequencies. The significance assessment of the differences between herd characteristics and bacterial isolation was performed using Pearson's chi-squared test. Bacterial isolation occurred in 15.4% (81/526) of the samples from 23.2% (61/263) of the goats. Escherichia coli (45.9% = 28/61), Staphylococcus caprae (16.4% = 10/61) and Enterococcus faecalis (11.5% = 7/61), were the most frequently isolated species. Bacterial isolations were predominant in dairy herds with up to 50 animals, production of 20 to 50 L/day and in the municipality of Porto da Folha. In terms of antimicrobial susceptibility, most isolates demonstrated resistance to penicillin and amoxicillin (88.5%), followed by ceftriaxone (23%), ofloxacin (23%), tetracycline (23%), doxycycline (19.7%), chloramphenicol (11.5%), levofloxacin (11.5%), ampicillin/sulbactam (8.2%), amikacin (6.6%), cephalothin (4.9%), cephalexin (3.3%) and gentamicin (3.3%). Approximately 20% of the isolates were multidrug resistant, especially E. coli (50%) and S. aureus (16.7%).Discussion: E. coli was the most frequently isolated species from the samples. It is considered an environmental pathogen, and its high frequency in different herds indicates poor milking hygiene. E. coli also stood out as the species presenting the most multidrug-resistant (MDR) isolates (50%), with strains resistant to beta-lactams, aminoglycosides, quinolones, tetracycline, and chloramphenicol. Coagulase-negative staphylococci are recognized as a public health problem as they areetiological agents of various diseases and can easily acquire antimicrobial resistance genes. Although it was not the most frequently isolated species, S. aureus was the species with the second-highest frequency of MDR strains. The presence of MDR species is relevant and indicates the need for urgent action to reduce the dissemination of antimicrobial resistance. Relevant steps must be taken jointly by professionals involved in human, animal, and environmental health.
Keywords: animal product, antimicrobial resistance, goats, one health, surveillance.
Título: Susceptibilidade a antimicrobianos de bactérias isoladas de leite caprino em Sergipe - Brasil
Descritores: produto de origem animal, resistência antimicrobiana, caprinos, saúde única, vigilância.Introdução: A resistência bacteriana é parte fundamental da Saúde Única, definida como a união humana indissociável entre as saúdes animal, e ambiental. produto, pelo consumo epidemiológica a disseminação de resistência bacteriana em animais, seus produtos são apresentados são alimentos vista carne, e podem apresentar-se por meio da cadeia de produção de alimentos pela manipulação faça o alimentos vista carne. Em virtude da resistência da informação, faz com que a caracterização da epidemia não seja necessária. Sendo assim, o objetivo deste trabalho foi determinar uma frequência e o perfil de sensibilidade a bactérias antimicrobianas isoladas de amostras de municípios de estado de Sergipe.
Discussão : A E. coli, foi a espécie mais frequente nas amostras. É considerado um patógeno ambiental, e sua alta frequência nos diferentes rebanhos indica higiene de ordem precária. E. coli também se destaca como uma espécie que mais apresentou isolados multidroga resistentes (MDR; 50%), com cepas resistentes a beta-lactâmicos, aminoglicosídeos, quinolonas, tetraciclinas e cloranfenicol. Os estafilococos coagulase negativas (SCN) são reconhecidos publicamente como um problema de saúde, já que são agentes etiológicos de várias enfermidades e têm facilidade de adquirirem genes de resistência a antimicrobianos. Embora não tenha sido a espécie mais isolada, S. aureusfoi a segunda espécie com maior frequência de cepas MDR. A presença de espécies MDR é relevante e alerta uma necessidade de ações urgentes para aumentar a disseminação da antimicrobianos, uma resistência para ser de maneira conjunta por profissionais na saúde humana, animal e ambiental
