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Information Journal Paper

Title

BOVINE PESTIVIRUS INFECTION: A CAUSE OF OVULATORY DISTURBANCE IN DAIRY COWS

Pages

  97-104

Abstract

 Twelve (Experiment I) and four (Experiment II) multiparous DAIRY COWS seronegative to pestivirus were selected and randomly assigned to either a control group which did not become infected or a treatment group in which all cows became infected following intranasal inoculation 9 days before AI. The experimental induction of infection was carried out with 2 ml of non-cytopathic pestivirus (BVD virus) suspension containing 5 log10 TCID50/ml (Experiment I) and 4.5 log10 TCID50/ml (Experiment II). In both experiments, the cows were super ovulated on day 10±2 of the cycle using the standard procedures. The cows in Experiment I were artificially inseminated at 12 and 24 h after the onset of estrus and a nonsurgical ova/embryo collection was performed 7 days after AI. In Experiment II, the cows were slaughtered on day 8 after SUPEROVULATION-induced estrus and the ovaries submitted for gross and histopahological examination including IMMUNOHISTOCHEMISTRY: Mean (±SE) number of ovulatory sized follicles on day of AI and corpora lutea palpated on day 7 after AI were significantly (p<0.05) higher in control un-infected cows compared to that of the pestivirus infected cows (17.1±2.6 vs. 9.2±1.1 and 12.2±2.7 vs. 2.8±0.9), respectively. On histopathological examinations, the mean (±SE) number of unovulated lutenised follicles (³9 mm in diameter) present on the ovaries of the control cows on day 8 after estrus was 6.8±4.9 compared to 12.5±5.4 for the infected cows. Further, many corpora lutea in the ovaries of infected cows had a hypoplastic or atrophic wall. In conclusion, the present study demonstrated that PESTIVIRUS INFECTION during the period of final growth of preovulatory follicles results in a disturbance in ovulation and development of corpus luteum leading to a poor superovulatory response in multiparous DAIRY COWS.

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    APA: Copy

    KAFI FALAVARJANI, M., & BIELEFELDT OHMANN, H.. (2006). BOVINE PESTIVIRUS INFECTION: A CAUSE OF OVULATORY DISTURBANCE IN DAIRY COWS. ARCHIVES OF RAZI INSTITUTE, 61(2), 97-104. SID. https://sid.ir/paper/120037/en

    Vancouver: Copy

    KAFI FALAVARJANI M., BIELEFELDT OHMANN H.. BOVINE PESTIVIRUS INFECTION: A CAUSE OF OVULATORY DISTURBANCE IN DAIRY COWS. ARCHIVES OF RAZI INSTITUTE[Internet]. 2006;61(2):97-104. Available from: https://sid.ir/paper/120037/en

    IEEE: Copy

    M. KAFI FALAVARJANI, and H. BIELEFELDT OHMANN, “BOVINE PESTIVIRUS INFECTION: A CAUSE OF OVULATORY DISTURBANCE IN DAIRY COWS,” ARCHIVES OF RAZI INSTITUTE, vol. 61, no. 2, pp. 97–104, 2006, [Online]. Available: https://sid.ir/paper/120037/en

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