The aim of this study was to determine the causes and identify the risk factors associated with pre-weaning mortality in four dual-purpose bovine herds in Colima, Mexico. Four herds were selected and births and deaths were recorded for 12 months. Information was collected on the calving number of the dam and the sex of the calf. Necropsy was performed in cases of death. Data were analyzed using the Chi-square test and logistic regression. The pre-weaning mortality rate was 4.30%, with half of the deaths occurring within the first 48 hours after birth, especially due to dystocia (50%) and congenital abnormalities (25%). A significant association was found between herd mortality and the number of calving of the cow (p<0.05), but not with the sex of the calf. Calves born in herd C were 4.60 times more likely to die than those born in the other three herds, while calves born to multiparou...

A study was conducted to evaluate the efficacy of ivermectin and albendazole sulfoxide for the control of gastrointestinal nematodes. Thirty Pelibuey ewes were randomly assigned to three experimental groups: Ivermectin 4% (10.2 mg/kg), albendazole sulfoxide 17% (3.75 mg/kg) and an untreated control group. Faecal samples were collected before drug administration (day 0) and on days 7, 14, 21, 28, 35, and 42 post-treatment. The quantitative diagnosis of the eggs was carried out using the McMaster technique and cultures were carried out to recover larvae by the migration method with the Baermann apparatus. The anthelmintic efficacy of the treatments was determined by the Abbott's formula and the effect of anthelmintics on the number of eggs per gram of faeces (EPG) by an analysis of variance with a completely randomized design. The most abundant species were Haemonchus contortus and Strongy...

The study evaluated the causes and risk factors associated with pre-weaning mortality in extensive and semi-extensive lamb production systems in a municipality in the coastal region of the state of Colima, Mexico. Mortality was assessed by necropsy and information on the number of births and the body condition of the ewe before lambing, litter size, sex, breed and weight of the lamb was recorded at the time of lambing. Statistical analysis was done using the Chi-square test of independence and by means of stepwise Logistic Regression. The overall pre-weaning mortality rate was 27.9%. The number of lambs born and dead was 875 and 244, respectively, where 88.1% of the mortality occurred during the first 48 hours of birth due to starvation-exposure syndrome. Pre-weaning mortality was significantly associated (p<0.05) with the flock, body condition of the ewe at parturition and with the l...

El objetivo del presente estudio fue determinar la prevalencia y describir las lesiones pulmonares de bovinos y porcinos sacrificados en la Procesadora Municipal de Carne de Colima, México, así como establecer su asociación con la procedencia, sexo y edad del animal. Se recolectaron muestras de pulmones de porcinos y bovinos con lesiones mediante visitas semanales durante cuatro meses, recabándose datos sobre su distribución, consistencia y tipo de exudado. Las muestras fueron fijadas en formalina bufferada al 10% para su proceso histológico con técnicas de rutina. De 873 y 2657 bovinos y porcinos sacrificados, 102 (11.7%) y 400 (15.1%) pulmones presentaron lesiones. Los bovinos menores de tres años y los procedentes del estado de Jalisco presentaron una mayor proporción de bronconeumonías supurativas en tanto que, las bronconeumonías fibrinosas y las neumonías intersticiales...

            The aim of this study was to characterize the morphology of the creole goat of the Volcanes de Colima physiographic sub-province, Mexico. Seventeen body measurements were taken from 371 goats older than two years and four racial indices and 17 functional indices were calculated. Data were analysed using Pearson correlation, principal component, and hierarchical cluster analysis. The rump angle, chest width and all measurements of the ears and udder showed the greatest variability. Also, the goats showed great morpho-structural harmony. Racial indices showed that goats are dolichocephalic, ellipometric, and have a convex rump, while functional indices indicated dual-purpose zootechnical aptitude. Four principal components explained 84.5% of the variation of body measurements. Rump angle, hearth girth, body length and ear l...

            The aim of this study was to characterize the morphology of the creole goat of the Volcanes de Colima physiographic sub-province, Mexico. Seventeen body measurements were taken from 371 goats older than two years and four racial indices and 17 functional indices were calculated. Data were analysed using Pearson correlation, principal component, and hierarchical cluster analysis. The rump angle, chest width and all measurements of the ears and udder showed the greatest variability. Also, the goats showed great morpho-structural harmony. Racial indices showed that goats are dolichocephalic, ellipometric, and have a convex rump, while functional indices indicated dual-purpose zootechnical aptitude. Four principal components explained 84.5% of the variation of body measurements. Rump angle, hearth girth, body length and ear l...

The objective of this study was to determine the main pathologies diagnosed during the period between 2019 and 2021 in sheep raised in the state of Colima, Mexico. Eigthy necropsies were performed and it was observed that the system with the most findings was the digestive 33/80 (41.3%), followed by the respiratory 24/80 (30.0%), the lymphatic 8/80 (10%), the skin 7 /80 (8.8%), the musculoskeletal 4/80 (5.0%), the central nervous 3/80 (3.8%) and finally the endocrine system 1/80 (1.3%). The results of necropsies and histopathology were grouped into the following categories: non-parasitic infectious 36/80 (45.0%), parasitic infectious 27/80 (33.8%), toxic 7/80 (8.8%), physical 6/80 (7.5%) and nutritional-metabolic 4/80 (5.0%). The main diagnoses were mycotic rhinitis 10/80 (12.5%), caseous lymphadenitis 8/80 (10.0%), and haemonchosis 7/80 (8.8%). The epidemiological and pathological data ...