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Original Research (Original Article) 


Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows

Mahmoud M. Elmaghraby, Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, Mohamed A.Tag EL-Dien.

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  • Abstract
    The objectives of this study were to determine the incidence of clinical mastitis (CM) in relation to some risk factors and its impact on reproductive performance of Holstein cows. Lactation records (n = 1875) covering the period between 2013 and 2016 were used. One third of cows (647/1875) had contracted at least one episode of CM throughout the entire lactation. Frequency of CM decreased progressively with the month of lactation, and approximately half of the cases occurred within the first three months postpartum. Incidence decreased (P<0.001) with level of milk yield, but increased (P<0.001) with parity. CM significantly (P<0.05) increased calving to first estrus (+ 7.69 days), and to calving first insemination intervals (+6.46 days) compared to non-affected ones. Furthermore, cows contracted CM before conception required 30.96 days more and +0.47 inseminations to conceive than cows without mastitis. In brief, CM has a negative impact on reproductive performance of Holstein dairy cows, and its occurrence is associated with level of milk yield, lactation order and stage of lactation.

    Key words: clinical mastitis; days open, services per conception, reproductive performance


     
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    Pubmed Style

    Elmaghraby MM, El-Nahas AF, Fathala MM, Sahwan FM, EL-Dien MA. Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. AJVS. 2017; 54(2): 84-90. doi:10.5455/ajvs.272337


    Web Style

    Elmaghraby MM, El-Nahas AF, Fathala MM, Sahwan FM, EL-Dien MA. Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. http://www.alexjvs.com/?mno=272337 [Access: July 21, 2018]. doi:10.5455/ajvs.272337


    AMA (American Medical Association) Style

    Elmaghraby MM, El-Nahas AF, Fathala MM, Sahwan FM, EL-Dien MA. Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. AJVS. 2017; 54(2): 84-90. doi:10.5455/ajvs.272337



    Vancouver/ICMJE Style

    Elmaghraby MM, El-Nahas AF, Fathala MM, Sahwan FM, EL-Dien MA. Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. AJVS. (2017), [cited July 21, 2018]; 54(2): 84-90. doi:10.5455/ajvs.272337



    Harvard Style

    Elmaghraby, M. M., El-Nahas, A. F., Fathala, M. M., Sahwan, F. M. & EL-Dien, M. A. (2017) Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. AJVS, 54 (2), 84-90. doi:10.5455/ajvs.272337



    Turabian Style

    Elmaghraby, Mahmoud M., Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, and Mohamed A.Tag EL-Dien. 2017. Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. Alexandria Journal of Veterinary Sciences, 54 (2), 84-90. doi:10.5455/ajvs.272337



    Chicago Style

    Elmaghraby, Mahmoud M., Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, and Mohamed A.Tag EL-Dien. "Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows." Alexandria Journal of Veterinary Sciences 54 (2017), 84-90. doi:10.5455/ajvs.272337



    MLA (The Modern Language Association) Style

    Elmaghraby, Mahmoud M., Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, and Mohamed A.Tag EL-Dien. "Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows." Alexandria Journal of Veterinary Sciences 54.2 (2017), 84-90. Print. doi:10.5455/ajvs.272337



    APA (American Psychological Association) Style

    Elmaghraby, M. M., El-Nahas, A. F., Fathala, M. M., Sahwan, F. M. & EL-Dien, M. A. (2017) Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. Alexandria Journal of Veterinary Sciences, 54 (2), 84-90. doi:10.5455/ajvs.272337





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