{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T14:34:32Z","timestamp":1784126072278,"version":"3.55.0"},"reference-count":29,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2015,6,25]],"date-time":"2015-06-25T00:00:00Z","timestamp":1435190400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Aust Veterinary J"],"published-print":{"date-parts":[[2015,7]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>To compare the antimicrobial susceptibility patterns of three common mastitis pathogens (<jats:italic>Staphylococcus aureus<\/jats:italic>, <jats:italic>Streptococcus uberis<\/jats:italic> and <jats:italic>Str. dysgalactiae<\/jats:italic>) isolated from milk samples from New Zealand and the USA.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A total of 182 <jats:italic>S. aureus<\/jats:italic>, 126 <jats:italic>Str. uberis<\/jats:italic> and 89 <jats:italic>Str. dysgalactiae<\/jats:italic> isolates from New Zealand (107, 106 and 41, respectively) and the USA (75, 20 and 48, respectively) were assessed using the disk diffusion test.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Susceptibility varied among the bacterial species. All isolates were susceptible to the amoxicillin\u2013clavulanic acid combination. Resistance to lincomycin was most frequent (susceptibility of 8.6%) across all species. Non\u2010susceptible (i.e. resistant or intermediate) isolates of <jats:italic>S. aureus<\/jats:italic> were identified for the three non\u2010isoxazolyl penicillins (amoxicillin, ampicillin and penicillin: 20.6% and 36.0%) and lincomycin (99.9% and 94.6%) for NZ and the USA, respectively. Resistance to erythromycin (5.3%) and tetracyclines (6.7%) was detected only in isolates from the USA. There were differences in susceptibility between <jats:italic>Str. uberis<\/jats:italic> and <jats:italic>Str. dysgalactiae<\/jats:italic>; all streptococcal isolates demonstrated resistance to aminoglycosides (neomycin 52.4% and streptomycin 27.9%) and enrofloxacin (28%). Resistance of <jats:italic>Str. dysgalactiae<\/jats:italic> to tetracycline was almost 100.0% and to oxytetracycline 89.9%.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion and clinical relevance<\/jats:title><jats:p>Most of the isolates tested were susceptible to most of the antimicrobials commonly used for treatment of bovine mastitis, with the exception of the lincosamides. Susceptibility to a selected class\u2010representative antimicrobial and at the genus level should be interpreted with caution. Differences between NZ and the USA confirm the value of national surveys to determine the susceptibility patterns of mastitis pathogens.<\/jats:p><\/jats:sec>","DOI":"10.1111\/avj.12340","type":"journal-article","created":{"date-parts":[[2015,6,27]],"date-time":"2015-06-27T02:51:20Z","timestamp":1435373480000},"page":"227-233","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Susceptibility to antimicrobials of mastitis\u2010causing <i>Staphylococcus aureus<\/i>, <i>Streptococcus uberis<\/i> and <i>Str. dysgalactiae<\/i> from New Zealand and the USA as assessed by the disk diffusion test"],"prefix":"10.1111","volume":"93","author":[{"given":"KR","family":"Petrovski","sequence":"first","affiliation":[{"name":"Institute of Veterinary, Animal and Biomedical Sciences Massey University  Palmerston North New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A","family":"Grinberg","sequence":"additional","affiliation":[{"name":"Institute of Veterinary, Animal and Biomedical Sciences Massey University  Palmerston North New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"NB","family":"Williamson","sequence":"additional","affiliation":[{"name":"Institute of Veterinary, Animal and Biomedical Sciences Massey University  Palmerston North New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"ME","family":"Abdalla","sequence":"additional","affiliation":[{"name":"Institute of Veterinary, Animal and Biomedical Sciences Massey University  Palmerston North New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N","family":"Lopez\u2010Villalobos","sequence":"additional","affiliation":[{"name":"Institute of Veterinary, Animal and Biomedical Sciences Massey University  Palmerston North New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"TJ","family":"Parkinson","sequence":"additional","affiliation":[{"name":"Institute of Veterinary, Animal and Biomedical Sciences Massey University  Palmerston North New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"IG","family":"Tucker","sequence":"additional","affiliation":[{"name":"School of Pharmacy University of Otago  Dunedin New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P","family":"Rapnicki","sequence":"additional","affiliation":[{"name":"Veterinary Diagnostic Laboratory University of Minnesota  MN USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2015,6,25]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1186\/BF03547813","article-title":"Bovine mastitis in Finland in 1988 and 1995: changes in prevalence and antimicrobial resistance","volume":"39","author":"Myllys V","year":"1998","journal-title":"Acta Vet Scand"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1186\/1751-0147-43-31"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1093\/ajcp\/45.4_ts.493"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1128\/AAC.37.5.1122"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022-0302(97)75952-6"},{"key":"e_1_2_10_7_1","volume-title":"Performance standard for antimicrobial disk and dilution susceptibility testing for bacteria isolated from animals; 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