In order to estimate the mean of maternal antibody in calves against BHV-1 (Bovine Herpes virus type 1), this study was carried out in a population of calves from non-vaccinated dairy cattle at 2 livestock in Qazvin province. One hundred thirteen sera out of 512 were collected from 1-4 months unvaccinated calves. We used Blocking –Percentage of maternal antibodies against BHV-1, which obtained ...

The severity of respiratory syncytial virus (RSV) infections appears to differ with age in both humans and bovines. A primary RSV infection in naïve infants and in young calves runs a more severe course when they are 1-6 months old than in their first month of life. The relative lack of clinical signs in the first month of age may be due to high levels of maternally derived neutralizing antibod...

Index: I. Feeding Pasteurized Milk to Dairy Calves – BAMN II. Precautions for Feeding Raw Waste Milk – Dairy & Animal Science, Pennsylvania State University, www.das.psu.edu/dairy/ III. Considerations for using Commercial On-Farm Pasteurization Systems Department of Dairy and Animal Science, The Pennsylvania State University, www.das.psu.edu/dairy/ IV. Calf Note #148 – Supplementing waste milk ...

Improving cow’s reproductive health during the transition period might be beneficial for the health status of newborn calves. We recently developed an intravaginal probiotic treatment to prevent uterine infections in dairy cows. This study sought to evaluate the effects of probiotic treatment of dairy cows on selected plasma variables and the incidence of diarrhea in newborn calves. Nineteen da...

To prevent encephalomyelitis caused by Akabane virus, as observed in 2006, vaccination of calves is one of the most effective prophylactic measures. For vaccination of calves, the duration of the maternal antibodies need to be considered because these antibodies are an obstacle to the effectiveness of the vaccine. In order to estimate the age of antibody decay in calves and to find factors infl...

The present study was conducted to determine the optimum age of Holstein dairy calves for an effective inclusion of alfalfa hay (AH) in starter feed on performance, apparent digestibility and feeding behavior. A total of 40 Holstein dairy calves (20 female and 20 male) were used in a completely randomized design in which calves were randomly assigned to one of four different dietary treatments ...

The changes in lymphocyte transformation rate and proportion of E-rosette forming cells (ERFC), in addition with serum concentration Qf IgG and certisol were examined on dairy cows in the perinatal period. The cows were bled at the various stages of pregnancy, parturition and post-parturient period. Also in calves, the lymphocyte transformation rate and proportion of ERFC were examined on the b...

The purpose of our survey is to estimate the frequency Cryptosporidium spp in dairy calves under 60 days age, pathogenic role development diarrhea, intervention and association other enteropathogens often involved neonatal diarrhea possible relationship between infection certain farming practices order share risk factors, on hand, compare modified Ziehl-Neelsen staining method copro-ELISA test....