E-ISSN 2536-9520 | ISSN 1110-2047
 
2025, Vol: 84
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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.


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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How to Cite this Article
Pubmed Style

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

Mahmoud M. Elmaghraby, Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, Mohamed A.Tag EL-Dien. Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. https://www.alexjvs.com/?mno=272337 [Access: December 02, 2024]. doi:10.5455/ajvs.272337

AMA (American Medical Association) Style

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

Mahmoud M. Elmaghraby, Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, Mohamed A.Tag EL-Dien. Incidence of Clinical Mastitis and its Influence on Reproductive Performance of Dairy Cows. AJVS. (2017), [cited December 02, 2024]; 54(2): 84-90. doi:10.5455/ajvs.272337


Harvard Style

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

Mahmoud M. Elmaghraby, Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, 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

Mahmoud M. Elmaghraby, Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, 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

Mahmoud M. Elmaghraby, Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, 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

Mahmoud M. Elmaghraby, Abeer F. El-Nahas, Mohamed M. Fathala, Ferial M. Sahwan, 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




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    About Alexandria Journal of Veterinary Sciences

    The Alexandria Journal of Veterinary Sciences (AJVS) Official Journal of Faculty of Veterinary Medicine, Alexandria University   ISSN: 1110 ... Read more.



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    Alexandria University
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    Egypt.

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