Somatic cell count and bacteria shedding from mammary quarters in cows with subclinical mastitis
نویسندگان
چکیده
منابع مشابه
Evaluation of somatic cell count thresholds to detect subclinical mastitis in Gyr cows.
The objectives of this study were (1) to determine the sensitivity (Se) and specificity (Sp) of somatic cell count (SCC) thresholds to identify subclinical mastitis in Gyr cows caused by major and minor pathogens; (2) to study the effects of month of sampling, rear or front mammary quarters, herd, intramammary infection (IMI), and bacterial species on SCC at quarter level; and (3) to describe t...
متن کاملSubclinical mastitis and intra-mammary infections in Swedish beef cows
Background In beef cows, milk production is the most important factor affecting calf growth. Thus, factors that limit production has negative effects on calf weaning weight. Mastitis is a disease, which reduces milk production and is often associated with bacterial intra-mammary infection (IMI). Studies from UK and USA indicate that subclinical mastitis and/or IMI significantly affects calf wea...
متن کاملThe effect of subclinical mastitis on milk composition in dairy cows
Milk samples were collected from quarters of 35 cows with subclinical mastitis (California mastitis test [CMT] positive and somatic cell counts [SCC] >500,000 cells/ml in individual quarter foremilk), as well as from 37 healthy controls. Compared to the levels observed in milk from healthy quarters, milk from quarters with subclinical mastitis showed elevated sodium (91.97 vs 52.93 mg/dl), chlo...
متن کاملEffect of somatic cell count and mastitis pathogens on milk composition in Gyr cows
BACKGROUND Gyr cows are well adapted to tropical conditions, resistant to some tropical diseases and have satisfactory milk production. However, Gyr dairy herds have a high prevalence of subclinical mastitis, which negatively affects their milk yield and composition. The objectives of this study were (i) to evaluate the effects of seasonality, mammary quarter location (rear x front), mastitis-c...
متن کاملGenetic associations between somatic cell score and pathogen-specific subclinical mastitis in Norwegian Red cows.
The aim of this study was to estimate heritabilities of and genetic correlations between pathogen-specific subclinical mastitis (SCM) traits and lactation mean somatic cell score (LSCS) in Norwegian Red cattle. Based on data from 130 733 first-lactation cows four binary pathogen-specific SCM traits, Staphylococcus aureus, Streptococcus dysgalactiae, Streptococcus uberis and coagulase-negative s...
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ژورنال
عنوان ژورنال: Revista do Instituto de Laticínios Cândido Tostes
سال: 2012
ISSN: 2238-6416
DOI: 10.5935/2238-6416.20120027