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Profile and evolution of antimicrobial resistance of ovine mastitis pathogens (1995–2004)

Lollai, Stefano and Ziccheddu, Maria and Dimauro, Corrado and Manunta, Daniela and Nudda, Anna and Leori, Guido (2008) Profile and evolution of antimicrobial resistance of ovine mastitis pathogens (1995–2004). Small Ruminant Research, Vol. 74 (1-3), p. 249-254. ISSN 0921-4488. Article.

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DOI: 10.1016/j.smallrumres.2007.04.007

Abstract

Antibiograms of selected mastitis pathogens, performed during the decade 1995–2004, were retrospectively analysed in order to evaluate antimicrobial resistance and determine whether resistance changed over time. Results of 2763 strains of Staphylococcus aureus, coagulase negative staphylococci, Streptococcus uberis and Escherichia coli, against penicillin, ampicillin, oxytetracycline, kanamycin and streptomycin are discussed. Strains were isolated in clinical milk samples from sheep suspected of mastitis. The evolution over time of resistance was evaluated by means of logistic regression analysis. The resistance of staphylococci to penicillin appeared to be lower than those usually reported (4.1% of resistant strains in S. aureus; 15.3% for CNS). Higher rates of resistance were observed for aminoglycosides, relevant for S. uberis (84.5% for kanamycin and 92.5% for streptomycin) and S. aureus (14.6% for kanamycin and 63.3% for streptomycin). Overall resistance appeared to confirm the lower resistance in ovine pathogens than in bovine ones. Logistic regression highlighted no trends to increase for resistance over time.

Item Type:Article
ID Code:3650
Status:Published
Refereed:Yes
Uncontrolled Keywords:Antimicrobial resistance, mastitis, sheep
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/19 Zootecnica speciale
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze zootecniche
002 Altri enti e centri di ricerca del Nord Sardegna > Istituto zooprofilattico sperimentale della Sardegna, Sassari > Centro di referenza nazionale per la mastopatia degli ovini e dei caprini, Sassari
002 Altri enti e centri di ricerca del Nord Sardegna > Istituto zooprofilattico sperimentale della Sardegna, Sassari
Publisher:Elsevier
ISSN:0921-4488
Deposited On:26 Mar 2010 22:52

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