DSc. Universidad Nacional de Colombia – Sede Palmira. Palmira, Colombia.
Fundación Universitaria Juan de Castellanos, Tunja-Boyacá, Colombia.
Laboratorio de Patología Veterinaria, Patóloga Práctica Privada, Colombia.
DSc. Universidad Nacional de Colombia – Sede Palmira, Palmira, Colombia.
DSc. Universidad Nacional de Colombia – Sede Palmira, Palmira, Colombia.
The number, size, and distribution of sweat glands are involved in cattle adaptation and thermoregulation mechanisms. Similarly, variations among different racial groups during grazing merit a morphometric study. The present work aimed to compare sweat glands and hair follicles in three cattle breed groups under low trophic conditions. This study was conducted in a tropical inter-Andean valley located between 3'30 and 4'10 N and between 76'21 and 76'46 W, with three breed groups. They were Holstein (Bos taurus), Cebu (Bos indicus), and animals of the Harton del Valle breed, Colombian Creole cattle (Bos taurus). From each breed, seven animals were analyzed, and each individual had a skin biopsy taken from the cervical area, close to the scapular joint. For the histological assemblies, optical microscopy was used to analyze the thickness of the glandular epithelium, counting the number of sweat glands per square millimeter, sebaceous glands, and hair follicles. The statistical analysis included descriptive statistics and one-way analysis of variance to determine the effect of racial group. The analysis revealed that neither the thickness of the glandular epithelium nor the number of sweat glands varied among the three racial groups, whereas the number of sebaceous glands and the number of hair follicles significantly differed. Compared with zebu cattle, Creole Harton del Valle cattle presented a lower number of hair follicles, sweat glands and sebaceous glands.
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