Ocorrência de mastite subclínica ovina durante duas lactações consecutivas em rebanho da raça Santa Inês

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Pesquisa dos genes icaD e bap de adesão intercelular bacteriana e formação de biofilme por Staphylococcus aureus e Staphylococcus coagulase-negativa isolados de mastite bovina

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Research of Klebsiella pneumoniae in dairy herds

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Detecção de genes de entrotoxinas de Staphylococcus aureus e estafilococos coagulase negativos isolados de leite bovino e de tanques de refrigeração comunitários procedentes de pequenas propriedades da região de Bauru-SP

Pós-graduação em Medicina Veterinária - FMVZ

Proposta de um programa de qualidade o leite e controle da mastite em rebanho bovino de vacas holandesas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Proteinograma sérico de bezerros recém-nascidos alimentados com colostro de vacas com mastite

The aim of this study was to evaluate the serum protein concentration in newborns fed with colostrum derived from healthy cows (n = 10), cows with subclinical mastitis (n = 10) and cows with clinical mastitis (n = 10). 30 Holstein cows were assigned to their respective groups according to macroscopic examination of colostral secretion, somatic cell count, CMT and presence of bacteria in colostrum samples. Blood samples of the calves were collected immediately after birth, at 24 and 48 hours after ingestion of colostrum. The total protein was measured by the biuret method and the concentrations of immunoglobulin A (IgA), immunoglobulin G (IgG), transferrin, albumin and haptoglobin was determined by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE). No differences were obser- ved amongst groups in the concentrations of albumin, total protein and IgA. In animals from cows with subclinical and clinical mastitis haptoglobin concentrations were higher than those of healthy animals. The concentrations of IgG and transferrin were significantly lower in calves from cows with mastitis. We concluded that the ingestion of colostrum from infected and uninfected glands from cows with mastitis (GII e GIII) is unlikely to be an important contributor to the high rate of failure of passive transfer of immunoglobulins in calves.

Contagem de células somáticas para o diagnóstico da mastite subclínica ovina em diferentes raças em dois períodos de lactação

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Características genotípicas de Staphylococcus coagulase-negativos e taxas de cura da mastite ovina

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Produção de biofilme, perfil de sensibilidade e aspectos epidemiológicos de espécies fúngicas e algas do gênero Prototheca isoladas de casos de mastite bovina

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Conscientização para adoção de boas práticas sanitárias em bem-estar animal no manejo das mastites do rebanho bovino: Miriam Yumi Makatu. -

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Capacidade de adesão, invasão e produção de enterotoxinas de Staphylococcus aureus isolados de leite de vacas com mastite subclínica e leite humano de um banco de leite

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Capacidade de adesão, invasão e produção de enterotoxinas de Staphylococcus aureus isolados de leite de vacas com mastite subclínica e leite humano de um banco de leite

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Polymorphonuclear leukocytes CH138+apoptosis evaluation in milk with high and low somatic cell count - preliminary data

Polymorphonuclear leukocyte (PMNL) apoptosis is central to the successful resolution of inflammation. Since Somatic Cell Count (SCC) is an indicator of the mammary gland's immune status, this study sought to clarify the influence that these factors have on each other and on the evolution of the inflammatory process. Milk samples were stained with annexin-V, propidium iodide (PI), primary antibody anti-CH138A. Negative correlation between SCC and PMNL apoptosis was found, and a statistical difference between high SCC group and low SCC group was observed concerning the rate of viable PMNL, apoptotic PMNL, necrotic PMNL and necrotic and/or apoptotic PMNL. Overall, the high cellularity group presented lower proportions of CH138+ cells undergoing apoptosis and higher proportions of viable and necrotic CH138+ cells. Thus, it can be concluded that PMNL apoptosis and SCC are related factors, and that in high SCC, milk apoptosis is delayed. Although there is a greater amount of active phagocytes in this situation, apoptosis' anti-inflammatory effects are decreased, while necrosis' pro-inflammatory effects are increased, which can contribute to chronic inflammation.

Nonculture-based identification of bacteria in milk by protein fingerprinting

Traditional methods for bacterial identification include Gram staining, culturing, and biochemical assays for phenotypic characterization of the causative organism. These methods can be time-consuming because they require in vitro cultivation of the microorganisms. Recently, however, it has become possible to obtain chemical profiles for lipids, peptides, and proteins that are present in an intact organism, particularly now that new developments have been made for the efficient ionization of biomolecules. MS has therefore become the state-of-the-art technology for microorganism identification in microbiological clinical diagnosis. Here, we introduce an innovative sample preparation method for nonculture-based identification of bacteria in milk. The technique detects characteristic profiles of intact proteins (mostly ribosomal) with the recently introduced MALDI SepsityperTM Kit followed by MALDI-MS. In combination with a dedicated bioinformatics software tool for databank matching, the method allows for almost real-time and reliable genus and species identification. We demonstrate the sensitivity of this protocol by experimentally contaminating pasteurized and homogenized whole milk samples with bacterial loads of 10(3)-10(8) colony-forming units (cfu) of laboratory strains of Escherichia coli, Enterococcus faecalis, and Staphylococcus aureus. For milk samples contaminated with a lower bacterial load (104 cfu mL-1), bacterial identification could be performed after initial incubation at 37 degrees C for 4 h. The sensitivity of the method may be influenced by the bacterial species and count, and therefore, it must be optimized for the specific application. The proposed use of protein markers for nonculture-based bacterial identification allows for high-throughput detection of pathogens present in milk samples. This method could therefore be useful in the veterinary practice and in the dairy industry, such as for the diagnosis of subclinical mastitis and for the sanitary monitoring of raw and processed milk products.

Lactation stage and udder health status of Santa Ines ewes

FAPESP [2003/08582-7]