Browsing by Author "Rincón, Juan C."

The consumers of pork demand products low in fat and free of additives that affect the human health. The objective of this study was to evaluate the effect of chromium-yeast or ractopamine added to the diet ...

The Cauca region in Colombia has indigenous reservations that have presented different problems associated with the armed conflict, which has limited the entities to carry out bovine disease control ...

El cromo-levadura y la ractopamina afectan el perfil de ácidos grasos y la calidad de la carne en cerdos
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Trujillo, Luis G. | 2020-01

The consumers of pork demand products low in fat and free of additives that affect the human health. The objective of this study was to evaluate the effect of chromium-yeast or ractopamine added to the diet of pigs on the performance, characteristics of the carcass and meat quality. Twenty pigs were randomized to four treatments: without the addition of chromium-yeast or ractopamine (T1); 10ppm of ractopamine (T2); 0.2ppm of chromium-yeast (T3) and 0.4ppm of chromium-yeast (T4). The backfat thickness was evaluated at the beginning, at the intermediate and at the end of the experiment. Hot carcass yield and cold carcass yield was evaluated in the slaughter house. Loin samples were taken to evaluate pH, shear force, drip loss, temperature, water retention and fatty acid composition. A descriptive analysis of the data and Kruskal-Wallis was carried out to determine the effect of the treatment on the measured variables. Any supplementation affected significantly weight gain, final weight, feed conversion, feed intake, hot carcass yield, cold carcass yield and backfat thinkness (P>0,05). Shear force increased with ractopamine, but decreased with chrome-yeast. Drip losses were significant at 0.2ppm chromium-yeast, but were not significant at 0.4ppm chromium-yeast or ractopamine. There was no effect of ractopamine on fatty acids, but with chromium-yeast was significant. Both chrome-yeast and ractopamine modify meat characteristics such as hardness and fatty acid profile

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Prevalencia de algunas enfermedades infecciosas en bovinos de resguardos indígenas del Cauca, Colombia, 2017
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Rivera, Diana C. | 2018-07

The Cauca region in Colombia has indigenous reservations that have presented different problems associated with the armed conflict, which has limited the entities to carry out bovine disease control programs. Therefore, the aim of this work was to determine the prevalence of some infectious diseases of reproductive traits in cattle of three indigenous resguards in Cauca, 2017. Blood samples of 30 cows were collected to determine the prevalence of Neospora caninum, Brucella abortus, bovine viral diarrhea (BVD), Infectious bovine rhinotracheitis (IBR) and Leptospira sp. serovars Hardjo prajitno, bovis and Pomona. The tests were performed by ELISA, rose bengal and microscopic agglutination. Using R software, a descriptive analysis was carried out and the frequencies for each disease were estimated. In addition, co-infections between diseases were estimated and a logistic regression model was performed to determine the effect of the herd, reservation, racial component, age group, number of animals and size of the farm on the disease positivity. The prevalence was N. caninum 36%, BVD 60%, IBR 30%, B. abortus 0%, Leptospira spp. serovars Hardjo prajitno 26%, Hardjo bovis 12%, y Pomona 10%. According to the risk anal-ysis, the seropositivity for BVD and IBR were associated with the place where the animals lived, in this case Tacueyó, but this was directly related to the size of the herds, since the greater, the area more animals were positive. In general, it was found that the situation in the region is similar to that of other sites in Colombia.

LEER

Browsing by Author "Rincón, Juan C."

El cromo-levadura y la ractopamina afectan el perfil de ácidos grasos y la calidad de la carne en cerdos ﻿

Prevalencia de algunas enfermedades infecciosas en bovinos de resguardos indígenas del Cauca, Colombia, 2017 ﻿

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El cromo-levadura y la ractopamina afectan el perfil de ácidos grasos y la calidad de la carne en cerdos

Prevalencia de algunas enfermedades infecciosas en bovinos de resguardos indígenas del Cauca, Colombia, 2017

El cromo-levadura y la ractopamina afectan el perfil de ácidos grasos y la calidad de la carne en cerdos

Prevalencia de algunas enfermedades infecciosas en bovinos de resguardos indígenas del Cauca, Colombia, 2017