HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Interpretive Summary Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Google Scholar Articles by Pitkälä, A. Articles by Björkroth, J. PubMed PubMed Citation Articles by Pitkälä, A. Articles by Björkroth, J.

Identification and Antimicrobial Resistance of Streptococcus uberis and Streptococcus parauberis Isolated from Bovine Milk Samples

A. Pitkälä^*,1, J. Koort and J. Björkroth

^* Finnish Food Safety Authority Evira, Mustialankatu 3, FIN-00790 Helsinki, Finland
Faculty of Veterinary Medicine, PO Box 66 (Agnes Sjöbergin katu 2), 00014 Helsinki University, Finland

¹ Corresponding author: anna.pitkala{at}evira.fi

The conventional identification of Streptococcus uberis/parauberis group (n = 137) in clinical and subclinical bovine mastitis samples originating from 111 different farms was compared with identification based on 16 and 23S rRNA gene HindIII RFLP patterns used as operational taxonomic units in numerical analyses. On the basis of ribopattern analysis only 2 isolates belonged to S. parauberis, which is thus not a frequent cause of bovine intramammary infections in Finland. According to in vitro antimicrobial susceptibility testing, Streptococcus uberis is susceptible to β-lactam antibiotics. The prevalence of erythromycin (15.6%) and oxytetracycline (40.6%) resistance of clinical S. uberis isolates was higher than reported previously among subclinical isolates. The 2 subclinical S. parauberis isolates were susceptible to all the antimicrobials tested.

Key Words: mastitis • identification • resistance • Streptococcus species