Search

Mediante la prueba California para Mastitis(CMT), se evaluaron 4.260 cuartos pertenecientesa 1.065 vacas en 15 fincas manejadas bajo el sistema doble propósito en el municipio de Montería (Córdoba) Colombia, las fincas fueron escogidas mediante un muestreo no probabilístico. De los cuartos con reacciones trazas hasta casos subclínicos y clínicos, se tomó una muestra de leche para aislar los microorganismos involucrados en la mastitis bovina. El 11.30% (n=480) de los cuartos fue positivo para mastitis subclínica. El 92.21% de los aislamientos involucró microorganismos infecciosos. Staphylococcus aureus , fue aislado en el 87.56% y se convirtió en el principal patógeno aislado. Staphylococcus coagulasa negativos (SCN) fueron aislados en el 0.3%. Streptococcus agalactiae fue aislado en el 2.10% de las muestras, Streptococuss uberis aislado en el 3.60%. Corynebacterium bovis se aisló en el 2.10%. Se puedeconcluir que Staphylococcus aureus fue el principal agente etiológico, siendo sensible a los antibióticos más usados en programas de prevención y control de la mastitis bovina en el sistema de producción doble propósito, en el municipio de Montería.Mediante o teste do California Mastites Test (CMT), foram avaliados 4260 quartos pertencentes a 1065 vacas em 15 fazendas que laboram no sistema carne e leite no município de Montería (Córdoba, Colômbia), seleccionadas no sistema de amostragem não probabilístico. Dos quartos com traços, de casos subclínicos e clínicos, foi tomada uma amostra de leite para isolar os microorganismos envolvidos namastite bovina. O 11.30% (n=480) dos quartos foram positivos para mastite subclínica. O 92.21% dosi solados apresentaram microorganismos infecciosos. Staphylococcus aureus , foi isolado no 7.56% e foi reconhecido como o principal patógeno isolado. Foram isolados nas amostras: Staphylococcus coagulasa negativos (0.3%), Streptococcus agalactiae (2.10%), Streptococcus uberis (3.60%) e Corynebacterium bovis (2.10%). O Staphylococcus aureus foi o principal agente etiológico e foi sensível aos antibióticos usualmente usados nos programas de prevenção e controle de mastite bovina nos sistemas de duplo aptidão no município de Montería.The prevalence of bovine mastitis was evaluated in 4.260 udder quarts from 1.065 cows located in 15 cattle farms managed as dual purpose systems (beef and dairy) in Monteria (Cordoba, Colombia). The farms were chosen using a non-random probability sampling design. To isolate the microorganisms involved in mastitis, milk samples were taken from the quarts with trace reaction, as well as from sub-clinical or clinically affected quarts. A high percentage (92.21%) of isolated samples included infectious organisms. The main pathogen isolated was Staphylococcus aureus (87.56% of samples), while Streptococuss uberis,Corynebacterium bovis, Streptococcus agalactiae, and coagulase-negative Staphylococcus (SCN) were found in 3.60, 2.10, 2.10, and 0.3% of samples, respectively. We conclude that Staphylococcus aureus, the main etiological agent, is sensitive to antibiotics commonly used in the prevention and control of mastitis on dual purpose systems in this region.

Mediante la prueba del California Mastitis Test (CMT), se evaluaron 11.416 cuartos pertenecientes a 2.854 vacas de 40 fincas especializadas en la producción de leche en el altiplano cundiboyacense, escogidas mediante un muestreo no probabilístico. De los cuartos positivos (reacciones desde trazas hasta casos clínicos) se tomó una muestra de leche para aislar los microorganismos involucrados en la mastitis bovina. El 34.40% (3.931) de los cuartos fueron positivos al CMT. El 49.01% de los aislamientos involucraron microorganismos infecciosos. Staphylococcus aureus, fue aislado en el 29.09% y se convirtió en el principal patógeno encontrado. Streptococcus agalactiae aislado en el 6.84% de las muestras. Las infecciones mixtas representaron el 1.2% y la asociación más frecuente fue la de Staph. aureus y Strep. agalactiae. Los Staphylococcus coagulasa positivos (SCP), diferentes al Staph. aureus se encontraron en el 4.04% de las muestras y en realidad no se tiene mucha información sobre ellos. Los Staphylococcus coagulasa negativos (SCN) fueron aislados en el 11.75%. Strep. uberis fue aislado en el 5.74% y Strep. dysgalactiae en el 2.62%. Corynebacterium bovis fueron aislados en el 8.44% y el Corynebacterium pyogenes en el 5.92%. El Staph. aureus esta siendo propagado por la realización de malas prácticas ganaderas en la implementación de programas de prevención y control de agentes infecciosos y por presentar múltiples factores de virulencia.Com a utilização do teste California Mastitis Test (CMT), foram avaliados 11.416 quartos pertencentes a 2.854 ubres de vacas de 40 fazendas especializadas na produção de leite no altiplano cundiboyacense. Os locais foram selecionados mediante seleção ao ocaso não probabilístico. Dos quartos positivos (reações desde traças ate casos clínicos) foi analisada uma amostra de leite para isolar os microorganismos envolvidos nas mastites bovinas. O 34.40% (3.931) dos quartos foram positivos ao CMT. O 49.01% dos isolados involucraram microorganismos infecciosos. Staphylococcus aureus foi isolado nos 29.09% e apresenta o principal patógeno encontrado. O Streptococcus agalactiae foi isolado nos 6.84% das amostras. As infecciones combinadas apresentaram o 1.2% e a relação mais freqüente foi Staph. aureus e Strep. agalactiae. Os Staphylococcus coagulasa positivos (SCP), diferentes ao Staph. aureus foram determinados no 4.04% das amostras, onde não existe muita informação sobre eles. Os Staphylococcus coagulasa negativos (SCN) foram isolados nos 11.75%. Streptococcus uberis foi isolado nos 5.74% e Strep. dysgalactiae nos 2.62%. Corynebacterium bovis foi isolado nos 8.44% e o Corynebacterium pyogenes nos 5.92%. O Staph. aureus, agente infeccioso esta sendo propagado pela realização de mas práticas na cria de gado com a implementação de programas de prevenção, controle e apresentação de múltiplas fatores de virulência.Using the Californian Mastitis Test (CMT), 11.416 udder quarts belonging to 2.854 cows from 40 milk production specialized farms of the cundiboyacense plain, selected at random, were evaluated. Of the 3.931 positive quarts (from reaction trace to clinical cases), a milk sample was taken in order to isolate the microorganisms involved in bovine. The 34.44% for the quarter were positive al CMT, the 49.01% involved infectious microorganisms. Staphylococcus aureus was the main pathogenic agent with 29.09% of the total isolations. Contrary to the normal indications from the temperate areas where Streptococcus agalactiae has been reported as the main pathogen with more than 50% of prevalence, in this study it was isolated in only 6.84% of the samples. Mix infections represented 1.2% and the most frequent association was between Staph. aureus and Strep. agalactiae. The coagulase positive Staphylococci (different to Staph. aureus) were found in 4.04% of the sample. The coagulase negative Staphylococci were isolated in 11.75% of the samples. Isolates of Strep. uberis, Strep. dysgalactiae, Corynebacterium bovis and Corynebacterium poygenes, were found in 5.74, 2.62, 8.44, and 5.92% of the samples, respectively. The main pathogen found in this study was the S. aureus, an infectious agent that is being propagated by conducting poor farming practices in implementing prevention and control programs.

Por medio de un estudio epidemiológico transversal en la Sabana de Bogotá y los valles de Ubaté y Chiquinquirá, se evaluó el funcionamiento de 37 equipos de ordeño mediante la realización de las pruebas estáticas y dinámicas; el diagnóstico de mastitis bovina fue realizado en 2854 vacas en ordeño. El modelo de regresión logística determinó cuales factores estaban asociados con la presencia o ausencia de mastitis bovina. La colocación de las unidades de ordeño sin la admisión de aire, el cumplimiento de la relación entre el número de unidades de ordeño y el diámetro de la tubería de pulsación fueron priorizados como factores de protección. La inadecuada eficiencia del regulador, el resbalamiento de las unidades de ordeño y un mal funcionamiento de los pulsadores se consideraron como factores de riesgo. Se determinó que el factor de riesgo que más esta contribuyendo a la presencia de mastitis bovina es el sobreordeño, definido como ordeño en seco, sobremanipulación de las unidades de ordeño, masaje sobre las ubres o la combinación de todas las anteriores formas, consideradas estas últimas prácticas como aspectos indeseables en una excelente rutina de ordeño.It was evaluated the performance of 37 milking machines throughout at transverse epidemiological study at the Bogotá savannah and the Ubate and Chiquinquirá Valleys, Colombia. Equipment function was evaluated by means of static and dynamic tests and mastitis diagnosis was accomplished on 2854 milking cows. The logistic regression model determined those factors associated with the presence or absence of bovine mastitis. Placing the milking machines without air intake, execution between the number of milking units and the pulsing piping diameter were considered of high priority as protecting factors. The regulator inefficiency, the machine sliding and breaking down of pulsimeters were considered as risk factors. It was determined either the overmilking (defined as in dry milking), the milking - machine overload, the under massages and all combinations of these practices, as the most undesirable aspect within and outstanding milking routine.

Summary Background: the worldwide trend in agro industries is to optimize food quality and obtain safe products for human consumption. It is important to produce milk with excellent physicochemical and microbiological quality to reduce public health risks. Objective: to evaluate the physicochemical and microbiological quality of milk and udder health in northwest Colombia, through the raw milk received at a leading dairy plant in Valledupar (Colombia). Methods: a non-probability sampling and a crosssectional study were conducted. Raw milk samples from 186 beef and milk (dual purpose) farms were collected. Physicochemical parameters, mesophilic and somatic cell counts were determined. Data were analyzed by descriptive statistics using SAS software. Results: physicochemical parameters were within the normal range in accordance with Colombian Decree No. 616 of 2006. The average mesophilic and somatic cell count was 305,279 colony forming units (CFU)/mL, and 523,207 somatic cells (SC)/mL, respectively. Sixty-eight percent of the farms had somatic cell counts greater than 200,000 SC/mL, which is the threshold for bovine mastitis. Conclusion: physicochemical quality of milk was good, but there were shortcomings in microbiological quality and udder health. Therefore, efforts are required to prevent this problems and to implement excellent management practices in the farms.