Prevalence of Intramammary Infection and Teat Canal Colonization In Unbred and Primigravid Dairy Heifers
نویسندگان
چکیده
منابع مشابه
Prevalence of and Risk-Factors for Intramammary Infection in Pasture-Grazed Dairy Heifers in Late Gestation
Mastitis is a common infectious disease in dairy cattle, and is among the most economically damaging animal health problem producers face. Mastitis in dairy heifers is recognised as a distinct problem from that in older cows because of the different pattern of disease (Barkema, Schukken et al. 999; Valde, Lawson et al. 004) and unique factors that determine its occurrence (Waage, Sviland et al....
متن کاملIntramammary infections during the periparturient period in Argentine dairy heifers.
Prevalence of intramammary infections at prepartum and postpartum in primigravid heifers from five dairy herds located in the central dairy area of Argentina was determined. Mammary secretion samples from 140 heifers (560 mammary quarters) were obtained 14 days prior to the expected calving day and within 7 days after parturition and subjected to bacteriological analysis. No clinical mastitis c...
متن کاملPrevalence and duration of intramammary infection in Danish heifers during the peripartum period.
Milk samples were collected from 180 heifers from 20 herds around parturition to study the prevalence and persistence of intramammary infection (IMI). A total of 3382 quarter milk samples was collected each week from 4 wk before parturition to 4 wk after parturition. Staphylococcus chromogenes, the most commonly found bacterial species before parturition, was isolated from 15% of all quarters. ...
متن کاملAssociation between teat skin colonization and intramammary infections with Staphylococcus aureus and Streptococcus agalactiae
Introduction and Objective Staphylococcus aureus and Streptococcus agalactiae are traditionally considered contagious mastitis pathogens mainly causing subclinical infections in dairy cattle. The consequences of subclinical mastitis are economic losses to the farmer and impaired milk quality. To improve the control of contagious mastitis pathogens, knowledge of reservoirs and transmission is cr...
متن کاملEffect of prepartum intramammary treatment with pirlimycin hydrochloride on prevalence of early first-lactation mastitis in dairy heifers.
OBJECTIVE To determine whether prepartum intramammary treatment of dairy heifers with pirlimycin hydrochloride would reduce the prevalence of intramammary infection (IMI) and lower the somatic cell count (SCC) during early lactation or improve 305-day mature equivalent milk production. DESIGN Prospective clinical trial. ANIMALS 183 Holstein-Friesian heifers (663 quarters) from 2 dairy farms...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1990
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(90)78652-3