Investigation of Milk Somatic Cell Counts During Early Lactation Stages in Awassi Ewes

Öz

This study aimed to investigate the change of somatic cells counts (SCC) and to determine its normal value during the early lactation period in healthy Awassi ewes. The study was conducted on a total of 75 healthy Awassi ewes. The animals were divided into three groups as those in the second week of lactation (Group 1; n= 25), those in the fourth week of lactation (Group 2; n= 25), and those in the sixth weeks of lactation (Group 3; n= 25). California Mastitis Test (CMT) negative animals were included in the study and, milk samples were collected for SCC analysis. In addition, blood samples were taken from all animals for alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase and gama glutamil transferaz analysis. SCC was significantly reduced in Group 2 compared to Group 1 (p<0.05). However, it was observed that Group 3 had a higher rate of SCC than the other groups (p<0.05). In conclusion, milk SCC was lowest in the fourth week of lactation, but reached the highest level in the sixth week. Since the milk yield was similar between the groups, it was thought that the SCC was not related to milk yield.

Anahtar Kelimeler

• Milk
• Ewe
• Lactation
• Somatic cell

İvesi Koyunlarında Erken Laktasyon Dönemindeki Süt Somatik Hücre Sayılarının Araştırılması

Öz

Sunulan çalışma, sağlıklı İvesi koyunlarda erken laktasyon dönemindeki somatik hücre sayısının (SCC) değişimini araştırmayı ve normal değerini belirlemeyi amaçlamıştır. Çalışma toplam 75 baş sağlıklı İvesi koyunu üzerinde yürütüldü. Hayvanlar, laktasyonun ikinci haftasında olanlar (Grup 1; n= 25), laktasyonun dördüncü haftasında olanlar (Grup 2; n= 25) ve laktasyonun altıncı haftasında olanlar (Grup 3; n= 25) olmak üzere üç gruba ayrıldı. California Mastitis Testi (CMT) negatif olan hayvanlar çalışmaya dahil edildi ve SCC analizi için süt örnekleri alındı. Ayrıca tüm hayvanlardan alanin aminotransferaz, aspartat aminotransferaz, alkalin fosfataz ve gama glutamil transferaz analizleri için kan örnekleri alındı. SCC, Grup 1'e kıyasla Grup 2'de önemli ölçüde azaldı (p<0.05). Bununla birlikte diğer gruplara kıyasla Grup 3'ün daha yüksek SCC oranına sahip olduğu tespit edildi (p<0.05). Sonuç olarak, süt SCC laktasyonun dördüncü haftasında en düşük düzeyde iken altıncı haftada en yüksek seviyeye ulaştı. Süt verimi gruplar arasında benzer olduğu için SCC'nin süt verimi ile ilişkili olmadığı düşünüldü.

Anahtar Kelimeler

• Koyun
• Laktasyon
• Somatik hücre
• Süt

Kaynakça

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