Microbial resistance to antibiotics poses a significant threat to both human and animal health, necessitating international efforts to mitigate this issue. This study aimed to assess the resistance profiles of Salmonella sp. isolates and identify the presence of intl1, sul1, and blaTEM resistance genes within antigenically characterized isolates, including Agona, Livingstone, Cerro, Schwarzengrund, Salmonella enterica subsp. enterica serotype O:4.5, Anatum, Enteritidis, Johannesburg, Corvallis, and Senftenberg. These isolates underwent susceptibility testing against 14 antibiotics. The highest resistance percentages were noted for sulfamethoxazole (91%), sulfonamides (51%), and ceftiofur (28.9%), while no resistance was observed for ciprofloxacin. Salmonella Johannesburg and Salmonella Corvallis showed resistance to one antibiotic, whereas other serovars were resistant to at least two. Salmonella Schwarzengrund exhibited resistance to 13 antibiotics. The intl1 gene was detected in six out of the ten serovars, and the sul1 gene in three, always co-occurring with intl1. The blaTEM gene was not identified. Our findings highlight the risk posed by the detected multiple resistances and genes to animal, human, and environmental health. The multidrug resistance, especially to third-generation cephalosporins and fluoroquinolones, highlights the need for stringent monitoring of Salmonella in laying hens. The potential of the environment, humans, eggs, and their products to act as vectors for antibiotic resistance represents a significant concern for One Health.

The composition of the intestinal microbiota can influence the metabolism and overall functioning of avian organisms. Therefore, the objective of this study was to evaluate the effect of three different probiotics and an antibiotic on the microbiomes of 1.400 male Cobb^® broiler raised for 42 days. The experiment was conducted with the following treatments: positive control diet (basal diet + antibiotic); negative control diet (basal diet without antibiotic and without probiotic); basal diet + Normal Avian Gut Flora (NAGF); basal diet + multiple colonizing strain probiotics (MCSPs); and basal diet + non-colonizing single strain probiotics (NCSSPs). The antibiotic (enramycin—antibiotic growth promoter) and probiotics were administered orally during all experiment (1 to 42 days), mixed with broiler feed. To determine the composition of the microbiota, five samples of ileal digesta were collected from 42-day-old chickens of each experimental group. The alpha and beta diversity of the ileal microbiota showed differences between the groups. MCSPs presented greater richness and uniformity compared to the positive control, negative control, and NCSSPs treatments, while the negative control exhibited greater homogeneity among samples than NCSSPs. MCSPs also showed a higher abundance of the genus Enterococcus. There were differences between the groups for low-abundance taxa (<0.5%), with NAGF showing higher levels of Delftia, Brevibacterium, and Bulleidia. In contrast, NCSSPs had a higher abundance of Ochrobactrum, Rhodoplanes, and Nitrospira. It was concluded that the treatments analyzed in this study induced modulations in the ileal microbiota of the chickens examined.

This experiment was carried out to evaluate the effects of organic acids on the intestinal integrity and productive performance of broiler chickens experimentally inoculated with Salmonella Enteritidis. Additionally, Salmonella colonization levels in internal organs were evaluated. The study included 576 one-day-old CobbTM male broilers, distributed into eight treatment groups and six replicates. A completely randomized experimental design (encapsulated butyric acid × inoculation by Salmonella Enteritidis) was used. Poultry was orally inoculated with Salmonella Enteritidis in the first day (0 [...] ABSTRACT This experiment was carried out to evaluate the effects of organic acids on the intestinal integrity and productive performance of broiler chickens experimentally inoculated with Salmonella Enteritidis. Additionally, Salmonella colonization levels in internal organs were evaluated. The study included 576 one-day-old CobbTM male broilers, distributed into eight treatment groups and six replicates. A completely randomized experimental design (encapsulated butyric acid × inoculation by Salmonella Enteritidis) was used. Poultry was orally inoculated with Salmonella Enteritidis in the first day (0

This research detected Listeria monocytogenes in samples of animal origin and equipment from processing industries using Real-Time PCR and VIDAS LMO 2 techniques. We analyzed 248 samples collected in dairy products, chicken meat, frozen, beef cuts, mechanically deboned chicken meat, fresh giblets, processed meat products and equipment of Brazilian processing plants. The microorganism was detected in 7.3% (18/248) of samples associating the two methodologies, in 6.4% (16/248) by Real-Time PCR and 4.0% (10/248) by the other method. L. monocytogenes was detected in 3.1% (3/95) of dairy products, 4.0% (3/74) of chicken meat, 84.6% (11/13) mechanically deboned chicken meat and 8.3% (1/12) processed meat products. The positive samples included mozzarella, fresh Minas cheese, chicken meat cut, mechanically deboned chicken meat, fresh chicken sausage. The bacteria were absent in frozen, beef cuts and equipment food processing industry samples. The presence of the bacteria in cheeses, chicken meats, and sausages indicated that these foods can pose risks to public health and emphasizes the need to implement control measures during processing. Equally worrying is the presence of the microorganism in mechanically deboned chicken meat and in the raw material for countless processed meat products.

A diverse group of professionals gathered in Brasília for the VI Brazilian Symposium on Toxoplasmosis and III International Symposium on Toxoplasmosis from October 17 to 19, 2023. Guided by the ‘One Health’ concept, the event addressed toxoplasmosis in its human, animal, and environmental dimensions. Participants discussed strategies to improve the prevention, diagnosis, and treatment of the disease in Brazil, also emphasizing a Pan-American cooperation. The resulting document, the Brasília Letter: Proposal for Toxoplasmosis Control in Brazil with a Multidisciplinary Approach and a Pan-American Cooperation Perspective, synthesizes the specialists’ concerns and proposes actions for the development of public health policies in Brazil and other countries in the Americas. This initiative aims to promote significant advances in toxoplasmosis control, benefiting society’s health on a continentaland global scale.