| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Department of Dairy Science, University of Wisconsin, Madison 53706
Corresponding author: P. L. Ruegg; e-mail: plruegg{at}wisc.edu.
The objective of this study was to examine the characteristics of milk samples submitted for microbiological examination at the Wisconsin Veterinary Diagnostic Laboratory between 1994 and 2001. Results (n = 83,650) of microbiological testing of milk samples (n = 77,172) submitted to the Wisconsin Veterinary Diagnostic Laboratory from January 1994 until June 2001 were analyzed. Submissions included milk samples obtained from cases of clinical and subclinical mastitis as well as samples obtained for mastitis surveillance programs. Results were recorded as no growth, contaminated, or identified as specific bacterial pathogens. Statistical analysis was performed to determine trends in the isolation of mastitis pathogens. The proportion of samples identified as contaminated decreased from 20.6 (1997) to 9.5% (2001). The proportion of samples coded as no growth increased from 22.6 (1994) to 49.7% (2001). Isolation of Staphylococcus aureus decreased from 17.7% (1994) of isolates to 9.7% (2001), while isolation of Streptococcus agalactiae decreased from 8.1 (1994) to 3.0% (2001). Coagulase-negative Staphylococcus spp. were isolated from 12.7 to 17.5%, environmental Streptococcus spp. were isolated from 11.6 to 20.1%, and Escherichia coli were isolated from 3.1 to 6.7% of all isolates. No growth and contaminated samples comprised almost 50% of total submissions, and it is important that producers have proper expectations when submitting milk samples. The proportion of isolates identified as Staph. aureus and Strep. agalactiae decreased, suggesting the proportion of contagious bacteria causing mastitis has decreased. Environmental and contagious pathogens demonstrated characteristic differences by season.
Key Words: dairy cow • mastitis • milk quality • milk sample
This article has been cited by other articles:
|
|
 |
|
  J. L. McCarron, G. P. Keefe, S. L. McKenna, I. R. Dohoo, and D. E. Poole Evaluation of the University of Minnesota Tri-plate and 3M Petrifilm for the isolation of Staphylococcus aureus and Streptococcus species from clinically mastitic milk samples J Dairy Sci, October 1, 2009; 92(10): 5326 - 5333. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Steeneveld, L. C. van der Gaag, H. W. Barkema, and H. Hogeveen Providing probability distributions for the causal pathogen of clinical mastitis using naive Bayesian networks J Dairy Sci, June 1, 2009; 92(6): 2598 - 2609. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Taponen, L. Salmikivi, H. Simojoki, M. T. Koskinen, and S. Pyorala Real-time polymerase chain reaction-based identification of bacteria in milk samples from bovine clinical mastitis with no growth in conventional culturing J Dairy Sci, June 1, 2009; 92(6): 2610 - 2617. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. M. Nam, S. K. Lim, H. M. Kang, J. M. Kim, J. S. Moon, K. C. Jang, J. M. Kim, Y. S. Joo, and S. C. Jung Prevalence and antimicrobial susceptibility of gram-negative bacteria isolated from bovine mastitis between 2003 and 2008 in Korea J Dairy Sci, May 1, 2009; 92(5): 2020 - 2026. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Ananda Baskaran, G. W. Kazmer, L. Hinckley, S. M. Andrew, and K. Venkitanarayanan Antibacterial effect of plant-derived antimicrobials on major bacterial mastitis pathogens in vitro J Dairy Sci, April 1, 2009; 92(4): 1423 - 1429. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. T. Koskinen, J. Holopainen, S. Pyorala, P. Bredbacka, A. Pitkala, H. W. Barkema, R. Bexiga, J. Roberson, L. Solverod, R. Piccinini, et al. Analytical specificity and sensitivity of a real-time polymerase chain reaction assay for identification of bovine mastitis pathogens J Dairy Sci, March 1, 2009; 92(3): 952 - 959. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Zeng, B. J. Bequette, B. T. Vinyard, and D. D. Bannerman Determination of milk and blood concentrations of lipopolysaccharide-binding protein in cows with naturally acquired subclinical and clinical mastitis J Dairy Sci, March 1, 2009; 92(3): 980 - 989. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. C. F. Pantoja, C. Hulland, and P. L. Ruegg Somatic cell count status across the dry period as a risk factor for the development of clinical mastitis in the subsequent lactation J Dairy Sci, January 1, 2009; 92(1): 139 - 148. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. Bar, L. W. Tauer, G. Bennett, R. N. Gonzalez, J. A. Hertl, Y. H. Schukken, H. F. Schulte, F. L. Welcome, and Y. T. Grohn The Cost of Generic Clinical Mastitis in Dairy Cows as Estimated by Using Dynamic Programming J Dairy Sci, June 1, 2008; 91(6): 2205 - 2214. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. D. Bannerman, A. C. W. Kauf, M. J. Paape, H. R. Springer, and J. P. Goff Comparison of Holstein and Jersey Innate Immune Responses to Escherichia coli Intramammary Infection J Dairy Sci, June 1, 2008; 91(6): 2225 - 2235. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Steeneveld, H. Hogeveen, H. W. Barkema, J. van den Broek, and R. B. M. Huirne The Influence of Cow Factors on the Incidence of Clinical Mastitis in Dairy Cows J Dairy Sci, April 1, 2008; 91(4): 1391 - 1402. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. D. Ferguson, G. Azzaro, M. Gambina, and G. Licitra Prevalence of Mastitis Pathogens in Ragusa, Sicily, from 2000 to 2006 J Dairy Sci, December 1, 2007; 90(12): 5798 - 5813. [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]
|
|
|
|
|
|
R. G. M. O. Riekerink, H. W. Barkema, and H. Stryhn The Effect of Season on Somatic Cell Count and the Incidence of Clinical Mastitis J Dairy Sci, April 1, 2007; 90(4): 1704 - 1715. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B.-A. Tenhagen, G. Koster, J. Wallmann, and W. Heuwieser Prevalence of mastitis pathogens and their resistance against antimicrobial agents in dairy cows in Brandenburg, Germany. J Dairy Sci, July 1, 2006; 89(7): 2542 - 2551. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. M. Swinkels, H. Hogeveen, and R. N. Zadoks A Partial Budget Model to Estimate Economic Benefits of Lactational Treatment of Subclinical Staphylococcus aureus Mastitis J Dairy Sci, December 1, 2005; 88(12): 4273 - 4287. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. O. Silva, D. Z. Caraviello, A. C. Rodrigues, and P. L. Ruegg Evaluation of Petrifilm for the Isolation of Staphylococcus aureus from Milk Samples J Dairy Sci, August 1, 2005; 88(8): 3000 - 3008. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
