Estimation of Milk Yield Losses from Subclinical Mastitis in Dairy Cows

Year 2024, , 263 - 269, 30.09.2024

Murat Tandoğan , Özay Güleş

https://doi.org/10.30607/kvj.1506469

Abstract

In order to estimate the prevalence of subclinical mastitis, somatic cell content in cow's milk is the main indicator. It was aimed at revealing the relationship between breed, age, number of lactations, lactation periods, average milk yield of cows, and somatic cell count (SCC) used in mastitis diagnosis. The material of the study consisted of milk from 300 mammary lobes belonging to 75 cows from different breeds (Holstein and Holstein Crossbred) aged between 3 and 8 years in dairy cattle enterprises in Efeler district of Aydın province between December 2020 and February 2021. To determine the association between SCC and milk yield, multiple regression analysis was used. There was no significant difference in SCC between crossbred Holstein and Holstein cows. It was determined that SCC increased with increasing age (≤4 and 5≥). In the study, it was determined that the daily milk yield of the cows was 21.1 kg, and it was found that the milk yield loss showed significant differences according to the SCC. In the analysis, there is a negative relationship between SCC and milk yield; an increase of 1 unit in SCC was estimated to result in a daily loss of 0.71 kg of milk output per cow.

Keywords

Cow, subclinic mastitis, somatic cell count, milk yield loss

Süt İneklerinde Subklinik Mastitisten Kaynaklanan Süt Verim Kayıplarının Tahmini

Abstract

İnek sütündeki somatik hücre konsantrasyonu, subklinik mastitis prevalansının tahmin edilmesinin ana göstergedir. Bu çalışmada ineklerin ırk, yaş, laktasyon sayısı, laktasyon dönemleri ve ortalama süt verimi ile mastitis tanısında kullanılan somatik hücre sayısı (SHS) arasındaki ilişkiyi ortaya çıkarmak amaçlanmıştır. Araştırmanın materyalini, Aydın ili Efeler ilçesindeki süt sığırcılığı işletmelerinde, Aralık 2020 ile Şubat 2021 tarihleri arasında 3 ila 8 yaşları arasındaki farklı ırklardan (Holstein ve Holstein Melez) 75 ineğe ait her meme lobundan (toplam 300) alınan süt örnekleri oluşturmuştur. SHS ve süt verimi arasındaki ilişkiyi belirlemek için çoklu regresyon analizi kullanılmıştır. Melez Holstein ve Holstein inekleri arasında SHS bakımından anlamlı bir fark bulunmamıştır. SHS'nin yaş arttıkça (≤4 ve ≥5 yaş) arttığı belirlenmiştir. Çalışmada, ineklerin günlük süt veriminin 21.1 kg olduğu ve SHS'ye göre süt verim kaybının anlamlı farklılıklar gösterdiği bulunmuştur. Analizde, SHS ve süt verimi arasında negatif bir ilişki olduğu; SHS'deki 1 birimlik artışın, inek başına günlük 0.71 kg süt verimi kaybına neden olduğu tahmin edilmiştir.

Keywords

İnek, subklinik mastitis, somatik hücre sayısı, süt verimi kaybı

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