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Antimicrobial Agents and Chemotherapy, June 2007, p. 2205-2207, Vol. 51, No. 6
0066-4804/07/$08.00+0     doi:10.1128/AAC.00056-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Antimicrobial Susceptibilities of Peptostreptococcus anaerobius and the Newly Described Peptostreptococcus stomatis Isolated from Various Human Sources{triangledown}

Eija Könönen,1* Anne Bryk,1 Päivi Niemi,2 and Arja Kanervo-Nordström1

Anaerobe Reference Laboratory, Department of Bacterial and Inflammatory Diseases, National Public Health Institute, Helsinki,1 Kymenlaakso Hospital District, Kotka, Finland2

Received 15 January 2007/ Returned for modification 1 February 2007/ Accepted 21 March 2007

Peptostreptococcus anaerobius sensu lato, currently including two closely related species, P. anaerobius and P. stomatis, is known to be more resistant than other gram-positive anaerobic cocci. We reidentified potential Peptostreptococcus isolates and tested their susceptibilities to eight antimicrobials. Notably, P. anaerobius had constantly higher values for the MIC at which 50% of the isolates are inhibited (MIC50) and the MIC90 than P. stomatis.

* Corresponding author. Mailing address: Anaerobe Reference Laboratory, National Public Health Institute (KTL), Mannerheimintie 166, FI-00300 Helsinki, Finland. Phone: 358-9-47448242. Fax: 358-9-47448238. E-mail: eija.kononen{at}ktl.fi

{triangledown} Published ahead of print on 2 April 2007.

Antimicrobial Agents and Chemotherapy, June 2007, p. 2205-2207, Vol. 51, No. 6
0066-4804/07/$08.00+0     doi:10.1128/AAC.00056-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.





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