| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Danish Veterinary Laboratory, DK-1790 Copenhagen V, Denmark
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. However, IMI with Staph. chromogenes decreased shortly after parturition to around 1% of quarters. Infections with Staphylococcus simulans and Staphylococcus epidermidis occurred in 1 to 3% of quarters both before and after parturition. Infections with Staph. simulans persisted in the same quarter for several weeks, but IMI with Staph. epidermidis were transient. Streptococcus dysgalactiae was isolated from 4 to 6% of quarters before and immediately after parturition, but the prevalence of IMI with Strep. dysgalactiae decreased. A strong association existed between IMI with Strep. dysgalactiae before parturition and IMI with Strep. dysgalactiae after parturition, and, using DNA typing, the persistence of 9 IMI was confirmed. Infections with Staphylococcus aureus rarely occurred before parturition, but the rate of IMI with Staph. aureus greatly increased during the 1st wk after parturition. No association was found between bacterial status before parturition and IMI with Staph. aureus after parturition. Overall, the presence of bacterial IMI in a quarter before parturition increased the risk of IMI for the lactating cow. This study demonstrated that variability in prevalence and duration of IMI according to bacterial species occurred around first parturition.
Key Words: heifer • mastitis • staphylococci • etiology
Submitted on November 10, 1995
Accepted on June 10, 1996
This article has been cited by other articles:
|
|
 |
|
  K. I. Parker, C. W. R. Compton, F. M. Anniss, C. Heuer, and S. McDougall Quarter-Level Analysis of Subclinical and Clinical Mastitis in Primiparous Heifers Following the Use of a Teat Sealant or an Injectable Antibiotic, or Both, Precalving J Dairy Sci, January 1, 2008; 91(1): 169 - 181. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. W. R. Compton, C. Heuer, K. Parker, and S. McDougall Epidemiology of Mastitis in Pasture-Grazed Peripartum Dairy Heifers and Its Effects on Productivity J Dairy Sci, September 1, 2007; 90(9): 4157 - 4170. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. W. R. Compton, C. Heuer, K. Parker, and S. McDougall Risk Factors for Peripartum Mastitis in Pasture-Grazed Dairy Heifers J Dairy Sci, September 1, 2007; 90(9): 4171 - 4180. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Taponen, J. Koort, J. Bjorkroth, H. Saloniemi, and S. Pyorala Bovine Intramammary Infections Caused by Coagulase-Negative Staphylococci May Persist Throughout Lactation According to Amplified Fragment Length Polymorphism-Based Analysis J Dairy Sci, July 1, 2007; 90(7): 3301 - 3307. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. I. Parker, C. Compton, F. M. Anniss, A. Weir, C. Heuer, and S. McDougall Subclinical and Clinical Mastitis in Heifers Following the Use of a Teat Sealant Precalving J Dairy Sci, January 1, 2007; 90(1): 207 - 218. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. De Vliegher, H. W. Barkema, H. Stryhn, G. Opsomer, and A. de Kruif Impact of Early Lactation Somatic Cell Count in Heifers on Milk Yield Over the First Lactation J Dairy Sci, March 1, 2005; 88(3): 938 - 947. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
