The Thai Journal of Veterinary Medicine


Behzad Mobini


The purpose of this study was to determine the histomorphometrical variations of hair follicles at different skin areas in Bakhtiari sheep. Twelve healthy adult sheep (6 males and 6 females) of the Bakhtiari breed, aged from 1 to 2 years, were selected from the abattoir of Shahrekord. Skin samples were taken from different areas, fixed and stained with haematoxylin and eosin. By using lattice line graticule (5x5) and ocular micrometer, the following histomorphometric indices were tested: number of primary and secondary follicles per one mm2; depth and width of primary and secondary follicles; ratios of number, depth and width of secondary to primary follicles; and width of primary and secondary hairs. In both sexes, the means of all indices varied among areas of skin. This breed may be characterized by the secondary to primary follicles ratio of 0.17-1.89, number of primary follicles per mm² of 2-12, number of secondary follicles per mm² of 0.67-9.67, depth of primary follicles of 760-1766.67 μm, depth of secondary follicles of 227.33-670 μm, width of primary follicles of 126.67-210, and width of secondary follicles of 51.67-128.33 μm. The results showed that except the width of primary follicles, width of secondary follicles and ratios of depth of secondary follicles to primary follicles, the means of all histomorphometric indices were affected by sex (p < 0.05). It can be concluded that Bakhtiari sheep possess coarse wool in this age.

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