Colombia is going through a dynamic research and technology transfer effort in order to improve its livestock enterprise.Animal production systems of twenty-two ecoregions in the lowland tropics are being characterized for ex-ante analysis to define technological alternatives.The Valley of Cesar in northern Colombia is a micro-region where agriculture has been its traditional production system, but now, 80% of the land ...

The capacity to degrade the cellular wall of Bouteloua repens of 12 isolates of Ruminococcus flavefaciens and 17 isolates of Fibrobacter succinogenes was determined. A procedure was developed to standardize both, the inoculum and the substrate concentration for in vitro incubations of pure culture isolates.The ruminal bacteria were isolated from either Bos indicus cattle from the Alto Magdalena region of Colombia, ...

The induced humoral immune response against structural proteins of Indiana and New Jersey serotypes of the vesicular stomatitis virus was compared using serum obtained from vaccinated bovine, natural and experimentally infected ones. It was used Western blot technique to observe the recognition of protein G by serum of vaccinated animals, and the response to proteins G and N by serum of infected animals. Serum of ...

In the Sinu Valley region (Cordoba, Colombia), 12 dual purpose Holstein × Cebú cows in the first third of lactation were used to evaluate the response of supplementation sorghum (Sorghum vulgare) silage mixed with urea-molasses-sulfur, whole cottonseed and fish meal on milk yield over 60 days period. Treatments were: T1 = silage-0.100 kg of urea-0.250 kg of molasses and 0.004 kg of sulfur. T2 = silage-1.5 kg of ...

A study was conducted in 36 farms of the Bogotá Savannah, Ubaté and Chiquinquirá Valleys and Tequendama Region (Cundinamarca), to determine via in vivo egg reduction count test (ERCT) antihelmintics resistance to bovine gastrointestinal nematodes. Resistance was determined in. 40 calves, three to 12 months of age, allotted to four groups of ten animals each one: 1) control (untreated); 2) albendazol 25% (5 mg/kg); ...

Regular diagnosis of leptospirosis is carried out by the microscopic agglutination test (MAI) which is defined as positive when readings are ≥ 1:100. Since this test only detects antibodies classified as M, it is considered ineffective for acceptable diagnosis in both: individuals or populations. Consequently, the level of infection in swine farms has been underestimated. A methodology was developed to improve reliability ...

The study of the clostridiosis in Colombia must be a priority for sanitary authorities due to the sanitary and economic impact caused by these bacteria. Disease clinical signs and symptoms, and effect on animals in good meat condition suppose a high financial impact. This article reviews major research in clostridiosis in recent years, published in scientific and gray literature. Emphasis is made on bovine sudden ...

In a Romosinuano native Colombian conservation herd, estimated genetic values (Expected Progeny Differences, EPD) of productive traits (birth, weaning and yearling weights and cow weights at calving and at calf weaning); and reproductive behavior (age at first calving and calving interval) were calculated. Among bulls with the higher and lower genetic potential, EPD’s for birth, weaning and yearling weights of ...

Cattle are used to convert forages, feed grains, and food byproducts into human food under production conditions that vary in soil, climate, feed composition and types of cattle. An analysis of our data base and our piblished data with lactating dairy cows indicate cattle performance is restricted to the level allowed by the most limiting nutrient, and that energetic efficiency is influenced by amino acid balance. The ...

Aislamiento, conservación y evaluación de la cinética de crecimiento y actividad celulolítica de aislados de Fibrobacter succinogenes de bovinos en pastoreo de gramíneas tropicalesMarta Liliana Arcos, Faisury Ossa y Tito E. Diaz MuñozEn este estudio se realizó el aislamiento de Fibrobader succinogenes, una de las principales bacterias celulolíticas ruminales de bovinos en pastoreo en praderas de Braquiaria (Brachiaria ...