Veterinary, Food Animals, Applied Microbiology and Biotechnology, Animal Science and Zoology
46
Scopus Publications
Scopus Publications
Environmental Persistence and Genotypic and Phenotypic Characterization of Salmonella Minnesota in Poultry Slaughterhouses Larissa Justino, Ana Angelita Sampaio Baptista, Rafael Humberto de Carvalho, Tiago Casella, Evelin Lurie Sano, et al. Pathogens, 2026 Salmonella Minnesota (SM) is considered an emerging serovar, adapted to the poultry production chain, frequently associated with antimicrobial resistance, biofilm formation, and environmental persistence. This study aimed to characterize SM isolates from a poultry slaughterhouse regarding phenotypic and genotypic profiles of antimicrobial resistance, biofilm-forming capacity, thermal tolerance, genotypic virulence profile, and clonal relatedness. Strains obtained from carcasses (n = 26), cecal contents (n = 25), and chiller water (n = 11) from the slaughterhouse were evaluated. A high frequency of resistance to β-lactams, multidrug-resistant phenotypes, and extended-spectrum β-lactamase-producing isolates were observed. All isolates harbored genes associated with virulence and biofilm formation (invA, csgD, and adrA). Biofilm formation was influenced by temperature, with greater intensity at refrigeration temperatures, especially on stainless steel surfaces. In thermal tolerance assays, a negative correlation between temperature and bacterial viability was observed. Genetically related lineages circulating among cecum, carcass, and slaughterhouse chiller water over time were observed. These findings indicate that the persistence of SM in poultry slaughterhouses is sustained by the interaction between antimicrobial resistance, adaptive capacity associated with biofilm formation, and the circulation of genetically related lineages, representing a relevant challenge for food safety and public health.
Evaluation of Predisposing Factors of Necrotic Enteritis in Experimentally Challenged Broiler Chickens Larissa Justino, Ana A. S. Baptista, Marielen de Souza, Maísa F. Menck-Costa, Bárbara G. Pires, et al. Animals, 2022 Clostridium perfringens is the etiological agent of NE, a disease that greatly affects the poultry industry. Experiments on the induction of NE are difficult to carry out, as it is a multifactorial disease, and thus different predisposing factors have been used. This study evaluated the effect of the Gumboro disease vaccine virus vaccine (IBDV-vac) associated or not with infection by Eimeria spp. in broilers, as a predisposing factor for NE. Broilers (n = 99) were divided into groups (11) challenged with IBDV-vac, Eimeria spp. CP type G (CP13, CP14 and CP03) or both. The macroscopic evaluation revealed that the highest average (3.45) of injury occurred for the CP13 + IBDV-vac group. The microscopic analysis showed that Eimeria spp. increased the population of intraepithelial lymphocytes and reduced the villus/crypt ratio in duodenum and jejunum when associated with CP13 or CP14. There was a synergistic effect between the CP strain used and the predisposing factors; nevertheless, it was not clear which was the most effective predisposing factor to potentiate the lesions, suggesting that the association of the strain with the factors should first be evaluated for each experimental protocol.
Probiotics: Reality of benefits for life, a review International Journal of Probiotics and Prebiotics, 2016
Physiologic parameters in female Red-billed curassows (Crax blumenbachii) in rehabilitation Guilherme A. Marietto-Gonçalves, Mayra T.A. Martins, Katiane L. Souza, Regina K. Takahira, Roberto C. Gonçalves, et al. Pesquisa Veterinaria Brasileira, 2016 The present paper reports blood gas analysis, hematologic and micro bacteriologic information on four female Red-billed curassows, rescued from illegal wild animal trading, that were undergoing habilitation for reintroduction into the wild through Projeto Centrofauna/Botucatu-SP. There is a lack of physiological data on this species, endemic to the region of Atlantic Forest (Mata Atlântica), now under threat of extinction. This lack of information makes the clinical evaluation of these birds very difficult and has a direct and adverse effect on any of these birds received for medical treatment in hospitals, veterinary clinics and centers for research and conservation, as well as in reintroduction centers.
First record of paratanaisia Bragai (Digenea: Eucotylidae) in blue and gold macaw (Ara ararauna) Tarcísio Macedo Silva, Leonardo Fabrício Pavan, Priscylla Tatiana Chalfum Guimarães-Okamoto, Elisane Lenita Milbradt, Raphael Lúcio Andreatti Filho, et al. Revista Brasileira De Parasitologia Veterinaria, 2016 The aim of this study was to provide the first report on a new host for the digenean Paratanaisia bragai in the caninde macaw Ara ararauna along with the pathological aspects of the infection in the new host. The microscopic findings revealed the presence of granulomatous interstitial nephritis. This study contributes towards knowledge of parasitism by P. bragai in A. ararauna, and emphasizes the need to use best practices in wildlife conservation parks.
Avian respiratory diseases attended in the Ornitopathology Laboratory of the FMVZ-UNESP/Botucatu-SP, Brazil, during the years 2005 and 2006 Archives of Veterinary Science, 2008
Using quantitative feed restriction to decrease mortality of male broilers Revista Brasileira De Zootecnia, 1998
Organic acids and anaerobic microflora for control of experimental infection of broilers by Salmonella typhimurium and S. Enteritidis Arquivo Brasileiro De Medicina Veterinaria E Zootecnia, 1997
Vaccination against avian colibacillosis. Protection against homologous and heterologous Escherichia coli serogroups Revista De Microbiologia, 1993
