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Báo cáo khoa học: "Pygomelia or supernumerary limbs in a crossbred calf"
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Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Pygomelia or supernumerary limbs in a crossbred calf | J. Vet. Sá. 2006 7 3 303-305 JOURNAL OF Case Report Veterinary Science Pygomelia or supernumerary limbs in a crossbred calf M. M. Rahman M. s. I. Khan D. Biswas B. c. Sutradhar A. K. M. Saifuddin Department of Medicine and Surgery Chittagong Government Veterinary College. Pahartali. Chittagong-4202. Bangladesh A crossbred Sindhi X local indigenous calf that was 12 days old was admitted to the Teaching Veterinary Hospital Chittagong Government Veterinary College Bangladesh with two accessory hind limbs attached to the pelvic region in between the hind legs. This was clinically identified as a congenital anomaly popularly called pygomelia. The pygomelia was successfully corrected by surgical excisions. Key words crossbred calf congenital defect pygomelia Congenital defects defined as abnormalities of structure or function that are present at birth occur relatively frequently in cattle 8 . These defects can result from either defective genetics or from a genetic insult agent that s associated with the fetal environment or from their interaction these defects are classified as lethal sub-lethal and non-lethal 7 . The susceptibility to an injurious environmental or to genetic agents varies with the stage of development and between species and the susceptibility decreases with advancement of fetal age. The frequency of individual defects varies with the species the breed the geographic location the season and other environmental factors. The incidence is estimated to range from 2 to 3.5 of all birth in calves lambs and foals 1 . In a cattle survey the percentages for the occurrence of congenital defects were reported as the musculoskeletal system 24 . the respiratory and alimentary tracts 13 . the central nervous system 22 . the abdominal wall 9 . the urogenital system 4 . the cardiovascular system 3 . the skin 2 . and others 4 7 . Congenital malformation sometimes leads to perinatal mortality and it may also decrease maternal productivity and reduce the value of the .