| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Mastitis Research Laboratory, Hill Farm Research Station, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Route 1, Box 10, Homer 71040
Teat canal keratin (n = 461) and mammary gland secretions (n = 370) were collected from 31 unbred and 85 primigravid Jersey heifers from one research and three commercial dairy herds. Of 97 heifers from which secretion samples were obtained, 96.9% had intramammary infections and 29% showed clinical symptoms. Seventy-five percent of quarters were infected. Staphylococcus aureus were isolated from 36 (37.1%) heifers and 55 (14.9%) quarters. One hundred and eight (93.1%) heifers and 326 (70.7%) quarters had teat canals colonized with mastitis pathogens. Staphylococcus aureus were isolated from teat canal keratin samples from 36 (31%) heifers and 57 (12.3%) quarters. The three most common species isolated from secretion and teat canal keratin samples were Staphylococcus chromogenes, Staphylococcus hyicus, and S. aureus. Secretions from infected (n = 240) and uninfected (n = 85) quarters had SCC of 13.6 x 106/ml and 5.7 x 106/ml. Macrophages were the most numerous cell type in secretions of infected and uninfected quarters. Quarters with teat canal colonization, but with no intramammary infections, exhibited higher SCC in secretion (9.3 x 106/ml) than quarters without both teat canal colonizations and intramammary infections (4.9 x 106/ml). Data indicated that intramammary infections and teat canal colonizations were more prevalent and SCC higher than previously realized in dairy heifers.
This article has been cited by other articles:
|
|
 |
|
  B.-M. Thorberg, M.-L. Danielsson-Tham, U. Emanuelson, and K. Persson Waller Bovine subclinical mastitis caused by different types of coagulase-negative staphylococci J Dairy Sci, October 1, 2009; 92(10): 4962 - 4970. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. Nemati, K. Hermans, D. Vancraeynest, S. De Vliegher, O. C. Sampimon, M. Baele, E. M. De Graef, F. Pasmans, and F. Haesebrouck Screening of bovine coagulase-negative staphylococci from milk for superantigen-encoding genes Vet Rec., December 20, 2008; 163(25): 740 - 743. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
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]
|
|
|
|
|
|
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]
|
|
|
|
|
|
C. Svensson, A.-K. Nyman, K. P. Waller, and U. Emanuelson Effects of housing, management, and health of dairy heifers on first-lactation udder health in southwest Sweden. J Dairy Sci, June 1, 2006; 89(6): 1990 - 1999. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. A. Borm, L. K. Fox, K. E. Leslie, J. S. Hogan, S. M. Andrew, K. M. Moyes, S. P. Oliver, Y. H. Schukken, D. D. Hancock, C. T. Gaskins, et al. Effects of prepartum intramammary antibiotic therapy on udder health, milk production, and reproductive performance in dairy heifers. J Dairy Sci, June 1, 2006; 89(6): 2090 - 2098. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. A. Tormo, E. Knecht, F. Gotz, I. Lasa, and J. R. Penades Bap-dependent biofilm formation by pathogenic species of Staphylococcus: evidence of horizontal gene transfer? Microbiology, July 1, 2005; 151(7): 2465 - 2475. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. P. Oliver, B. E. Gillespie, S. J. Ivey, M. J. Lewis, D. L. Johnson, K. C. Lamar, H. Moorehead, H. H. Dowlen, S. T. Chester, and J. W. Hallberg Influence of Prepartum Pirlimycin Hydrochloride or Penicillin-Novobiocin Therapy on Mastitis in Heifers During Early Lactation J Dairy Sci, June 1, 2004; 87(6): 1727 - 1731. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. De Vliegher, H. Laevens, H. W. Barkema, I. R. Dohoo, H. Stryhn, G. Opsomer, and A. de Kruif Management Practices and Heifer Characteristics Associated with Early Lactation Somatic Cell Count of Belgian Dairy Heifers J Dairy Sci, April 1, 2004; 87(4): 937 - 947. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. P. Oliver, M. J. Lewis, B. E. Gillespie, H. H. Dowlen, E. C. Jaenicke, and R. K. Roberts Prepartum Antibiotic Treatment of Heifers: Milk Production, Milk Quality and Economic Benefit J Dairy Sci, April 1, 2003; 86(4): 1187 - 1193. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. Zhang and C. W. Maddox Cytotoxic Activity of Coagulase-Negative Staphylococci in Bovine Mastitis Infect. Immun., March 1, 2000; 68(3): 1102 - 1108. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
