Protective effect of Staphylococcus chromogenes infection against Staphylococcus aureus infection in the lactating bovine mammary gland

Journal of Dairy Science
K R MatthewsB A Smith

Abstract

The susceptibility of uninfected or Staphylococcus chromogenes-infected quarters to challenge with Staphylococcus aureus was measured. Seventeen S. chromogenes-infected quarters were challenged by infusion of S. aureus into the teat sinus; 47% (8 of 17) became infected and all 18 uninfected quarters challenged similarly with S. aureus became infected. No differences in daily milk yield were seen between uninfected quarters and S. chromogenes-infected quarters prior to S. aureus infusion. Postinfusion, milk yield for S. aureus-infected, S. chromogenes-infected, and S. chromogenes- and S. aureus-infected quarters differed. Somatic cell counts were elevated in S. chromogenes-infected quarters compared with uninfected quarters prior to S. aureus infusion. Somatic cell counts were not different between S. aureus- and S. chromogenes- and S. aureus-infected quarters postinfusion, but were different for S. chromogenes-infected quarters. Chloride concentrations in S. chromogenes- and S. aureus-infected quarters were different from either S. aureus-infected or S. chromogenes-infected quarters. Staphylococcus aureus colony forming units in quarters with preexisting S. chromogenes infections were lower than S. aureus colony-forming units i...Continue Reading

References

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Citations

Jul 2, 2017·Applied and Environmental Microbiology·Domonique A CarsonJeroen De Buck
Jul 1, 1995·Journal of Dairy Science·S C NickersonR L Boddie
Aug 1, 1994·Journal of Dairy Science·A M McClureJ Miramonti
Jul 1, 1999·Journal of Dairy Science·S J Lacy-HulbertK Stelwagen
Mar 22, 2003·Journal of Dairy Science·C PerisN Fernández
Sep 10, 1999·Journal of Dairy Science·H W BarkemaA Brand
Jun 2, 2007·Veterinary Research·Ilectra A FragkouGeorge C Fthenakis
Aug 20, 2019·Journal of Dairy Science·Irma CastroJuan Miguel Rodríguez
Oct 26, 2000·Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health·L K Fox, D S Adams
Jun 18, 2005·Journal of Applied Microbiology·H J JørgensenL M Rørvik
Oct 19, 2005·Journal of Dairy Science·H J JørgensenL M Rørvik
Apr 5, 2001·Journal of Dairy Science·R N ZadoksY H Schukken
May 14, 2003·Journal of Dairy Science·R W ScalettiR J Harmon
Jan 28, 2012·Journal of Dairy Science·R W Scaletti, R J Harmon

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