Proactive udder health management in South Africa and monitoring of antibiotic resistance of Staphylococcus aureus; in dairy herds from 2001 to 2010

Journal of the South African Veterinary Association
Joanne KarzisVinny Naidoo

Abstract

Antibiotic resistance of strains of Staphylococcus aureus isolated from bovine milk is of concern internationally. The objective of this study was to investigate trends of resistance of S. aureus to antibiotics administered to dairy cows in 19 South African and one Zambian dairy herds (participating in the South African proactive udder health management programme) and to identify possible contributing factors. The resistance of S. aureus strains to eight commonly used antibiotics in South Africa from 2001 to 2010 was evaluated. Staphylococcus aureus isolates (n = 2532) were selected from cows with subclinical mastitis in 20 herds routinely sampled as part of the proactive udder health management programme. The isolates were selected from milk samples that had somatic cell counts more than 400 000 cells/mL and were tested for antibiotic resistance using a standard Kirby-Bauer test with published clinical breakpoints. The prevalence of antibiotic resistance was evaluated as a percentage of S. aureus isolates susceptible out of the total numbers for each antibiotic selected per year. Staphylococcus aureus showed a significant increase in percentage of susceptible isolates over time for all antibiotics tested except for ampicillin....Continue Reading

References

Oct 15, 2003·Veterinary Research·Ynte H SchukkenRuben N Gonzalez
Mar 22, 2005·Journal of Dairy Science·J M BurgosM F Varela
Jun 25, 2005·Journal of Clinical Pathology·A A Ramadhan, E Hegedus
Aug 12, 2010·JAMA : the Journal of the American Medical Association·Alexander J KallenUNKNOWN Active Bacterial Core surveillance (ABCs) MRSA Investigators of the Emerging Infections Program
Sep 2, 2010·Microbiology and Molecular Biology Reviews : MMBR·Julian Davies, Dorothy Davies
Dec 6, 2011·Journal of the South African Veterinary Association·T Schmidt

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Citations

Jul 12, 2019·The Onderstepoort Journal of Veterinary Research·Joanne KarzisEric M C Etter

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