title: Status of bovine mastitis and associated risk factors in subtropical Jeju Island, South Korea.
abstract: The present investigation was carried out to study the prevalence of mastitis in 136 Holstein cows from a subtropical province of South Korea. Out of 527 milk samples studied, 22.6 % were found positive for mastitis. On animal level, prevalence was estimated at 55.2 %. Late lactating cows were at higher risk for mastitis development as compared to those in early and mid lactations. The study revealed that the risk of an increase in somatic cell count (SSC) and mastitis increased with advanced age and in animals with higher parity. The highest infection rate of 71.4 % was found in the age group >9 years followed by cows with higher than fifth parity (65.5 %). On severity and quarter basis, cows of <3 years of age had higher occurrence (12.5 %) of severe mastitis. From the present study, it may be concluded that a positive relationship exists between increased prevalence of mastitis and high SCC and the advance in age and parity of Holstein cows.
authors.affiliation: Department of Animal Biotechnology, Faculty of Biotechnology, Jeju National University, Ara-1 Dong, Jeju City, Jeju-Do, 690-756, South Korea.
authors.forename: Neelesh
authors.initials: N
authors.lastname: Sharma
authors.forename: Tae Young
authors.initials: TY
authors.lastname: Kang
authors.forename: Sung-Jin
authors.initials: SJ
authors.lastname: Lee
authors.forename: Jin Nam
authors.initials: JN
authors.lastname: Kim
authors.forename: Chang Hyun
authors.initials: CH
authors.lastname: Hur
authors.forename: Jong Chul
authors.initials: JC
authors.lastname: Ha
authors.forename: Vikas
authors.initials: V
authors.lastname: Vohra
authors.forename: Dong Kee
authors.initials: DK
authors.lastname: Jeong
mesh_terms: D000818:Animals; D002417:Cattle; D005260:Female; D016018:Least-Squares Analysis; D008414:Mastitis, Bovine / Q000453:epidemiology / Q000382:microbiology*; D008892:Milk / Q000382:microbiology*; D015995:Prevalence; D056910:Republic of Korea / Q000453:epidemiology