The high incidence of stillbirth in Swedish Holstein heifers has increased continuously during the last 15 years to an average of 11% today. The pathological reasons behind the increased incidence of stillbirth are unknown. The present experiment was undertaken to investigate possible causes of stillbirth and to study possible physiological markers for predicting stillbirth. Twenty Swedish Hols...

Effects of seven breeds of cow's sire and 12 breeds of cow's maternal grandsire on preweaning performance of crossbred cows and their calves were examined in data from two experiments conducted at the Roman L. Hruska U.S. Mean Animal Research Center. Data included 1,836 records over three to five parities for 516 cows by 143 sires and by 307 maternal grandsires. The statistical model fitted eff...

a rapid and simple technique for diagnosis of rotaviral diarrhea is polyacrylamide gel electrophoresis (page) of dsrna extracted from fecal samples. to determine the electrophoretype of iranian calf rotavirus, 23 rotaviral positive fecal samples from diarrheic holstein calves at the age of less than one month in tehran region were examined. the viral dsrna was extracted with phenol-chloroform, ...

Case Description- A three month Holstein female calf with a supernumerary limb in the caudal cervical region was delivered to a private veterinary clinic in Kashmar.Clinical Findings- Clinical and radiographical examinations revealed a vestigial scapula, distally bifurcated humerus, two underdeveloped ulnae, two ossification centers for radius and more or less complete duplication of manus in t...

The objective of this study was to validate the diagnostic accuracy Petrifilm culture system (3M, St. Paul, MN) for identifying colostrum with excessive bacterial contamination. An observational cross-sectional conducted between October 2015 and February 2016. Two aliquots were collected during first meal 332 calves (33 commercial Holstein dairy farms) in Quebec, Canada. One aliquot per calf us...