Prevalence of contagious mastitis pathogens in bulk tank milk in Prince Edward Island

The purpose of this study was to 1) estimate the herd prevalence of contagious mastitis pathogens in bulk milk from Prince Edward Island (PEI) dairy farms, 2) determine the association between bulk milk culture results and mean bulk milk somatic cell count (BMSCC), and 3) investigate the agreement o...

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Bibliographic Details
Published in:Canadian veterinary journal 2006-06, Vol.47 (6), p.567-572
Main Authors: Riekerink, R.G.M. olde, Barkema, H.W, Veenstra, S, Poole, D.E, Dingwell, R.T, Keefe, G.P
Format: Article
Language:English
Subjects:
Animals
bacterial contamination
bovine mastitis
bulk milk
Cattle
Cell Count - veterinary
dairy cows
Dairying - standards
disease prevalence
Female
food contamination
Mastitis, Bovine - diagnosis
Mastitis, Bovine - epidemiology
Mastitis, Bovine - microbiology
milk
Milk - cytology
Milk - microbiology
Mycoplasma
Mycoplasma Infections - epidemiology
Mycoplasma Infections - veterinary
Prevalence
Prince Edward Island - epidemiology
Scientific
Sensitivity and Specificity
somatic cell count
Staphylococcal Infections - epidemiology
Staphylococcal Infections - veterinary
Staphylococcus aureus
Streptococcal Infections - epidemiology
Streptococcal Infections - veterinary
Streptococcus agalactiae
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Summary:The purpose of this study was to 1) estimate the herd prevalence of contagious mastitis pathogens in bulk milk from Prince Edward Island (PEI) dairy farms, 2) determine the association between bulk milk culture results and mean bulk milk somatic cell count (BMSCC), and 3) investigate the agreement of repeated bulk milk cultures. Three consecutive bulk milk samples were obtained at weekly intervals from all 258 PEI dairy herds and were cultured using routine laboratory methods. Cumulative prevalence of Staphylococcus aureus, Streptococcus agalactiae, and Mycoplasma spp. (M. bovis and M. alkalescens) was 74%, 1.6%, and 1.9%, respectively. Bulk milk somatic cell count of Staph. aureus-positive herds was higher than that of negative herds. Agreement for Staph. aureus isolation between 3 consecutive tests was moderate (kappa = 0.46). Mycoplasma bovis and M. alkalescens in bulk milk are being reported for the 1st time in PEI ever and in Canada since 1972.
ISSN:0008-5286