The effect of season on the prevalence risk and effect of mastitis prevalence risk on daily milk yield

Abstract

Aiming determination of the variability in the mastitis prevalence risk and the effect of prevalence risk on successive daily milk yield of dairy cows (Holstein and Simmental breed) test-day records collected from 2005 to 2022 were used. As a mastitis risk indicator, daily lactose content was used. The highest mastitis prevalence risk was determined, in both breeds, during the winter period and the lowest during the spring season, with the lower prevalence observed in Simmentals. The effect of mastitis prevalence risk on the cow's productivity at successive milk recordings was more pronounced in the Holstein breed that experienced the higher increase at the I. successive milk recording and high total increase during the analyzed 4-month period than the Simmental. Observed could indicate better overall health and higher resistance of the Simmental breed, as well as a higher recovery capability from subclinical mastitis of Holstein cows.

U cilju utvrđivanja varijabilnosti u riziku od pojavnosti mastitisa i utjecaja rizika od pojavnosti na sukcesivnu dnevnu količinu mlijeka mliječnih krava (holstein i simentalske pasmine) korišteni su zapisi na kontrolni dan prikupljeni od 2005. do 2022. godine. Kao indikator rizika od mastitisa korišten je dnevni sadržaj laktoze. Najveći rizik od pojavnosti mastitisa utvrđen je, u obje pasmine, u zimskom razdoblju, a najmanji u proljetnoj sezoni, s nižom pojavnosti u simentalske pasmine. Utjecaj rizika od pojavnosti mastitisa na produktivnost krava pri uzastopnim kontrolama mliječnosti bio je izraženiji kod holstein pasmine koja je imala veći porast pri I. sukcesivnoj kontroli mliječnosti i veći ukupni porast proizvodnosti tijekom analiziranog 4-mjesečnog razdoblja od simentalske pasmine. Utvrđeni rezultati bi mogli ukazivati na bolje opće zdravlje i veću otpornost simentalske, kao i na veću sposobnost oporavka od subkliničkog mastitisa Holstein pasmine.