Juniper Publishers Journal of Dairy and Veterinary Sciences

JUNIPER PUBLISHERS - OPEN ACCESS JOURNAL OF DAIRY & VETERINARY SCIENCES Abstract Data from several research studies over the last five years in dairy and beef cattle have indicated that insemination closer to the time of ovulation than with conventional semen may improve conception rates. Previous data indicated that insemination between 8 to 16 post activity thresholds [Select Detect) was ideal for use with conventional semen in lactating Holstein cows [ 1 ]. A recent study [ 2 ] indicated that the optimal timing of insemination using an activity system [SCR Engineers ltd., Netanya, Israel) occurred somewhere between 23 to 41 h after the reaching the activity threshold activity level in lactating Jersey cows. The current study was designed to determine the optimal time of insemination in Jersey cattle (cows and heifers) based on the onset of activity defined by the Cow Manager® system. Materials and Methods ...

Report on Isolation and Identification of Brucella Abortus from Aborted Foetus and Lymph Nodes of Beef Cattle in Malaysia   Authored by Zainor M Khairani-Bejo S Isolation of living brucellae from tissues or organs such as aborted foetus and lymph nodes has traditionally provided the most accurate method for the detection of Brucella infection. The inoculated medium was incubated at 37 °C for 7 days with 10% CO2. Bacterial colonies growth on the agar was examined. The bacterial cells were stained with Gram-staining and Modified Ziehl-Neelsen staining methods and later were examined under microscope to determine their cell morphology. Biochemical tests were performed to complete the phenotypic and metabolic characterisation of the isolates. Brucella abortus were isolated from stomach content, lung and cotyledon of the aborted foetus; and supramammary and internal iliac lymph nodes of aborted cattle. Histopathological examination of lymph nodes found the infiltr...