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Articles by R. Asadpour
Total Records ( 3 ) for R. Asadpour
  R. Asadpour , H. Tayefi-Nasrabadi , G.A. Moghadam and K. Nofouzi
  This study was conducted to determine the levels and relationship between Lacto Peroxidase (LP) activity and somatic cell count (SCC) for diagnosis subclinical mastitis in early lactation of dairy cows. Foremilk samples were obtained from quarters of 80 cows (August 2007 up to February 2008). Any cows had not evidence of clinical mastitis at time of sampling. The SCC ranged from 5.24×105 cells/mL in the first parity to 5.5×105 in the third parity with a mean value of 5.45×105. The mean LP activity in first, second and third parity were found 6.49, 4.63 U and 5.5 U mL 1, respectively. No significant correlation (r = 0, p>0.05) was found between number of SCC and LP values in early lactation. Since, the measurement of LP activity of milk may not be used as a predictor subclinical mastitis in the early lactation period of dairy cows.
  R. Asadpour , H. Tayefi-Nasrabadi , G.A. Moghadam and K. Nofouzi
  Association between values for the Somatic Cell Count (SCC) and intramammary infection (IMI) were studied in 80 dairy cows from dairy herd in Iran during the first 5-15 days post calving. Samples were cultured for bacterial presence and were tested for SCC. Intramammary infection was defined as the presence of one or two bacterial species in milk samples taken within 5-15 day postcalving. Prevalence of IMI was large; 65% of milk samples were infected. Approximately 30% of the cows classified as infected with Coagulase-negative Staphylococci (CNS) and S. aureus had the pathogen identified on 5-15 days post calving. Streptococcus agalactia accounted for 10% of the IMI. Remaining IMI were by other pathogeneses among which Escherichia coli, Proteus sp., Klebsiella sp. Arcanobacter pyogenes. All milk samples from dairy cows in early lactation had SCC ranged from 5.24×105 cells mL 1 in the first parity to 5.5×105 in the third parity with a mean value of 5.45×105. No significant differences were observed (p>0.05) in SCC values between parities. Also, no significant differences were found (p>0.05) between SCC values and infections. Thus, these testing strategies may not be ideal for making decisions about individual animals, such as identifying individual cow with S. aureus for segregated milking.
  R. Asadpour , F. Rezazadeh and H. Hamali
  The objective of this study, was to evaluate testosterone profiles of serum in buffalo bulls and to examine its correlation with semen characteristics. Semen of 10 buffalo bulls were collected by a bovine artificial vagina. Semen characteristics such as (motility, morphology, viability and concentration) were recorded. A part of the semen sample (1 mL) was diluted by tris-egg yolk-glycerol extender, packed in French straws and was frozen in liquid nitrogen. The straws were later thawed and semen characteristics were compared with those of the fresh semen. The blood samples were collected in vacutainers without anticoagulant. After 1 h at room temperature, the samples were centrifuged at 2000 rpm for 20 min and then the sera were collected, immediately frozen and thereafter kept at -20°C until the hormone assay, performed by RIA. The results showed the overall MeanąS.E. blood testosterone concentration was 1.3ą0.9 ng mL 1. Blood serum testosterone was correlated with progressive motility and viability of the fresh and frozen-thawed semen. Progressive motility, viability and abnormal sperm morphology of frozen-thawed semen were highly correlated with mentioned above parameters in the fresh semen. Testosterone serum concentrations in buffalo bulls are similar to those reported in other animal species and have some correlations with semen characteristics before and after freezing.
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