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Relationships among severity and duration of clinical mastitis and sire transmitting abilities for somatic cell score, udder type traits, productive life, and protein yield
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ABSTRACT
The objective of this study was to determine the relationships among severity and duration of clinical mastitis during first and second lactation and sire transmitting abilities for somatic cell score, udder type traits, productive life, and protein yield. Recording of clinical episodes began at first parturition for 1704 Holstein cows (in six Pennsylvania herds and one Nebraska herd) and continued into second lactation for 1055 of these cows. A total of 456 cows (sired by 168 bulls) had at least one clinical episode during first lactation, and 230 cows (sired by 100 bulls) had at ...
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Short Communication: Efficacy of Parenteral Ceftiofur for Treatment of Systemically Mild Clinical Mastitis in Dairy Cattle
; ...outcomes of systemically mild clinical mastitis episodes in lactating dairy cattle. Cows with clinical mastitis were randomly assigned to a...outcome of systemically mild clinical mastitis. (Key words: clinical mastitis...
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Subclinical and Clinical Mastitis in Heifers Following the Use of a Teat Sealant Precalving
; ...postcalving IMI and incidence of clinical mastitis in the first 2 wk postcalving. Glands...from glands they defined as having clinical mastitis. The gland prevalence of IMI precalving...postcalving 3.6-fold and the risk of clinical mastitis 4-fold, relative to no IMI precalving...
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Influence of dry period bacterial intramammary infection on clinical mastitis in dairy cows
; ...infection (IMI) during the dry period and clinical mastitis in the next lactation. All quarters...were collected from all cases of clinical mastitis during the following lactation. Logistic...present during the sampling period and clinical mastitis. The probability of a quarter ...
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Parenteral Treatment of Clinical Mastitis with Tylosin Base or Penethamate Hydriodide in Dairy Cattle
; ...bacteriological cure rates of cows with clinical mastitis following treatment with either tylosin...number of glands within the cow with clinical mastitis, bacterial species, and days postpartum...production between dairy cows with clinical mastitis and those treated for ...
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Genetic Associations Between Clinical Mastitis and Somatic Cell Score in Early First-Lactation Cows
; ...genetic associations between clinical mastitis and somatic cell score (SCS...of cows with and without clinical mastitis, and to compare genetic evaluations of sires based on SCS or clinical mastitis. Clinical mastitis records...
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Somatic Cell Count Distributions During Lactation Predict Clinical Mastitis
; ...were most closely associated with clinical mastitis. Three separate data sets were used...containing cow SCC (n = 933 and 11,825). Clinical mastitis was defined as a binary outcome...were the best overall indicators of clinical mastitis. Distributions of SCC were also investigated...
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Effects of Induced Clinical Mastitis During Preovulation on Endocrine and Follicular Function
; ...determine if experimentally induced clinical mastitis before ovulation resulted in alterations...follicular growth and ovulation. Cows with clinical mastitis (n = 12) had elevated rectal temperatures...were challenged but did not develop clinical mastitis (n = 5) displayed estrus and ...
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Genetic analysis of longitudinal trajectory of clinical mastitis in first-lactation Norwegian Cattle
; ABSTRACT Clinical mastitis records for 36,178 first-lactation...each. Absence or presence of clinical mastitis within each interval was scored...trajectory of liability to clinical mastitis. Heritability ranged between...
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Effect of Clinical Mastitis on the Lactation Curve: A Mixed Model Estimation Using Daily Milk Weights
; ...production losses associated with clinical mastitis using mixed linear models and correlation...detailed and accurate recordings of clinical mastitis cases. Two commercial Holstein dairy...was used as a diagnostic aid for clinical mastitis on both farms. Date of clinical onset...
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Mild to Moderate Clinical Mastitis: Efficacy of Intramammary Amoxicillin, Frequent Milk-Out, a Combined Intramammary Amoxicillin, and Frequent Milk-Out Treatment Versus No Treatment
; ...of managing mild to moderate clinical mastitis in a university dairy herd...manner, treatment selection for clinical mastitis should be based on culture results. (Key words: clinical mastitis, frequent milk-out, treatment...
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