title: Characterization of coagulase negative staphylococci from cases of subclinical mastitis in dairy cattle in Kampala, Uganda.
abstract: BACKGROUND
  Coagulase negative staphylococci (CNS) are the most common pathogens leading to subclinical mastitis (SCM) in dairy cattle in Uganda. Coagulase negative staphylococci can vary between bacterial species in how they cause disease. The aim of the study was to characterize CNS, from cows with SCM in Uganda, at the species level.
  
  
  RESULTS
  Quarter milk samples (n = 166) were collected from 78 animals with SCM. Bacteriological analyses were carried out at Makerere University, Kampala, Uganda and at the National Veterinary Institute (SVA), Uppsala, Sweden. The most common pathogens found in milk samples from cows with SCM were CNS (31.7%). Two species of CNS were found, S. epidermidis (85%) and S. haemolyticus (15%). Of the CNS isolates, 16/20 (80%) were positive for β-lactamase production (β+).
  
  
  CONCLUSIONS
  In milk samples from cows with SCM caused by CNS, S. epidermidis was most prevalent, followed by S. haemolyticus.
authors.affiliation: Division of Reproduction, Department of Clinical Sciences, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden.
authors.forename: Sandra
authors.initials: S
authors.lastname: Björk
authors.affiliation: Division of Reproduction, Department of Clinical Sciences, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden.
authors.forename: Renee
authors.initials: R
authors.lastname: Båge
authors.affiliation: College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda.
authors.forename: Benon M
authors.initials: BM
authors.lastname: Kanyima
authors.affiliation: Department of Bacteriology, National Veterinary Institute (SVA), Uppsala, Sweden.
authors.forename: Susanne
authors.initials: S
authors.lastname: André
authors.affiliation: College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda.
authors.forename: Maria G
authors.initials: MG
authors.lastname: Nassuna-Musoke
authors.affiliation: College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda.
authors.forename: David O
authors.initials: DO
authors.lastname: Owiny
authors.affiliation: Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute/Växa Sverige, Uppsala, Sweden.
authors.forename: Ylva
authors.initials: Y
authors.lastname: Persson
keywords: CNS; MALDI-TOF; Staphylococcus epidermidis; Staphylococcus haemolyticus