The effect of udder and milking hygiene on systemic immunization approaches in dairy herds

Sütçü inek işletmelerinde mastitislere karşı sistemik immunizasyon uygulamalarında meme ve sağım hijyeninin etkisi

Abstract

The aim of the study was to investigate the defence activity of systemic immunization against clinical and subc-linical mastitis by due to udder and milking hygiene conditions in dairy herds managements. The study was carried out on a total of 80 cows which are selected randomly from Ankara University Faculty of Agriculture Farm (AUZF) and from the family type herds (1-4 cows) in Ankara region. Milking-machine was used in the first management, udder disinfection before milking, teat dipping after milking and dry cow infusions to udder lobes was applied. However, in the second managements hand milking was made and the protective procedures that are mentioned above were not taken. Inactive mastitis vaccine Mastivac® (S.agalactiae, S.dysgalactiae, S.uberis, S.aureus, E.coli, A.pyogenes) was used for systemic immunization. Mastivac® vaccines were injected sub-cutaneously to cows from neck region and saline solution was injected to 20 control cows in each group, by the same procedure. The injections were repeated 15 days after the first application. The effectiveness of the vaccine on clinical and subclinical mastitis was evaluated during 12 months after immunization. California mastitis test (CMT) and somatic cell count (SCC) were made from the in-dividual milk samples collected monthly. The bactéries were evaluated from milk samples that have SCC>500.()()0 cell/ml and from the cows having clinical mastitis. Also, randomize clinical mastitis cases were evaluated. There was a statisticaly insignificant dec-rease at SCC of the vaccine group when compared to control group in AUZF management (p>0.05). However, there was a sta-tisticaly significant decrease in the SCC of the vaccine group in the family type management when compared to control group. After 2 months of vaccination CMT results in AUZF management show insignificant differences for control group while CMT results of family type managements shows significant decrease. In the first two months, all clinical mastitis cases occured in vaccine group in AUZF management; and no clinical cases were seen in the other months. On the other hand 13 cases seen in the control group dist-ributed to the other months. Likewise, all cases were seen in the in the first two months in the vaccine group of family type ma-nagements. Clinical mastitis were distributed to the other months in control groups. Before the vaccination the most isolated mic-roorganism was S.aureus with 59.1% in AUZF farm and 70.6% in family type herd. After vaccination the strain were decreased to 26.4 and 42.7, respectively. There were not significant differences in the presence S.agalactiae after vaccination when compared to pre-vaccination. During the first two months after immunization, E.coli was identified in the clinical cases, but after this period the strain were not seen. According to the identification results after vaccination, sufficient immunization can not be obtained against S.uberis and S.pyogenes which are involved in the vaccine. In conclusion, the vaccine was effective in both managements of all vac-cinated cows when the severity and the quantity of clinic mastitis cases were taken into consideration and in the family type ma-nagements when it was evaluated with their SCC.

Özet

Bu çalışmada, sütçü inek işletmelerinde meme ve sağım hijyeni koşullarına bağlı olarak, sistemik immunizasyon ile mastitislere karşı korunma etkinliği araştırıldı. Çalışma, makinayla sağılan, sağım öncesinde meme dezenfeksiyonu, sonrasında teat dipping ve kuruya çıkan meme bölümlerine antibiyotik infüzyonu uygulanan Ankara Üniversitesi Ziraat Fakültesi (AÜZF) işletmesi ile, elle sağılarak diğer önlemler alınmayan (aile tipi) işletmelerden seçilen, toplam 80 baş inek üzerinde yürütüldü. Sistemik im-munizasyon amacıyla, Mastivac® adlı (S.agalactiae, S.dysgalactiae, S.uberis, S.pyogenes, S.aureus, E.coli, A.pyogenes) inaktif mas-titis aşısı kullanıldı. Her iki tip işletmeden 20 ineğe aşı uygulanırken, 20 ineğe de plasebo enjekte edildi. Birinci uygulamadan 15 gün sonra enjeksiyonlar tekrar edildi. Uygulanan aşının mastitisler yönünden etkinliğini araştırmak üzere, immunizasyon öncesinde ve sonrasında, 12 ay süre ile, her ay toplanan süt örneklerinde, sıralı olarak, Kaliforniya mastitis testi (CMT) ve somatik hücre sayımı (SHS) ile mikrobiyolojik yoklamalar yapıldı. Bunların yamsıra klinik mastitisler değerlendirildi. AÜZF işletmesinde aşılama gru-bunun SHS'lerinde kontrol grubuna kıyasla istatistik yönden önemsiz, buna karşılık diğer tip yetiştirmelerde önemli düşmeler gö-rüldü. Klinik mastitisler yönünden, AÜZF ve aile tipi işletmelerde, sırasıyla aşılama gruplarında 4'er, kontrol gruplarında ise 13 ve 6 olgu belirlendi. Aşılama öncesinde S.aureus, AÜZF işletmesinde %59.1 ve aile tipi işletmelerde %70.6 ile en fazla izole edilen mik-roorganizma oldu. Aşının uygulanmasından sonra bu etkenin rastlantısı sırasıyla %26.4 ve %42.7 oranlarına azalma gösterdi. Aşı-lama sonrasında S.agalactiae ve S.dysgalactiae rastlantılarında, öncesine kıyasla önemli bir değişiklik görülmedi. Sonuç olarak, kli-nik mastitis olgularının şiddeti ve niceliği göz önünde tutulduğunda tüm aşılanan ineklerde; SHS'leri ile birlikte değerlendirildiğinde ise aile tipi işletmelerde aşının daha etkili olduğu belirlendi.