Mahmoud Al-Mohamed ^1*

1 Animal Production, Faculty of Agricultural Engineering, University of Aleppo, Aleppo, Syria.

(*Corresponding author: Dr. Mahmoud Al-Mohamed. E-Mail: Mahmoud.lb.Almohamed@gmail.com ).

Received: 8/ 05/  2024     Accepted: 29/ 07/ 2024

Abstract

The research was conducted at the Jeb Ramla Cattle Station and the Faculty of Agricultural Engineering at the University of Aleppo, during the years 2022-2023, on 52 Holstein Friesian cows. With the aim of studying the effect of mastitis and the level of somatic cells counts on the average of both the voluntary waiting period and days open. Statistical analysis was conducted using SPSS 26. The results showed a highly significant effect of mastitis and the level of somatic cells counts on the length of both the voluntary waiting period and the days open period. It was noted that the best studied reproductive indicators were in cows with a low level of somatic cells counts. The average voluntary waiting period and days open period were 69.15 and 104.48 days in healthy animals, compared to 90.69 and 174.00 days in animals that were exposed to mastitis during the first phase of the period lactation. It was also estimated that the length of the voluntary waiting period and the open period increased by 21.54 and 69.52 days, respectively, in the case of mastitis. A positive and highly significant correlation was found between both the voluntary waiting period and the open period with mastitis and the level of somatic cell counts.
Keywords: Mastitis, Somatic Cell Counts, SCC, Voluntary Waiting Period, Days Open, Cows, Holstein, Friesian.

 Full paper in Arabic: PDF