title: [Investigation on the identification accuracy for group B Streptococcus by automated identification system RAISUS].
abstract: Since we had experienced a case of misidentification for group B Streptococcus (GBS) (Streptococcus agalactiae) by automated identification system RAISUS, we have investigated the identification accuracy for GBS by automated identification system RAISUS system using our stock isolated of GBS. Among 31 strains including standard strain ATCC13813 of GBS, 30 strains were identified as GBS, while only 1 strain was misidentified as Streptococcus constellatus. We have needed 3 hours to identify 29 true GBS strains, while it has taken 6 hours for misidentified strain as S. constellatus. Since we have needed more than 4 hours for our misidentified strain of GBS, the tendency for identification time to become long has been recognized. Longer identification time might be associated with the misidentification. The improvement for galactose and glycerol tests of RAISUS by the manufacturer has resulted in better identification. As for the strains to be identified as S. constellatus by RAISUS, we might re-check it with other identification kits when there is higher clinical necessity.
authors.affiliation: Department of Infection Control and Prevention, Aichi Medical University Hospital, 1-1 Yazakokarimata, Nagakute-shi, Aichi 480-1195, Japan. atsuy@aichi-med-u.ac.jp
authors.forename: Atsuko
authors.initials: A
authors.lastname: Yamada
authors.forename: Yuka
authors.initials: Y
authors.lastname: Yamagishi
authors.forename: Kaori
authors.initials: K
authors.lastname: Tanaka
authors.forename: Haruki
authors.initials: H
authors.lastname: Sawamura
authors.forename: Tomoko
authors.initials: T
authors.lastname: Ohno
authors.forename: Wakako
authors.initials: W
authors.lastname: Naito
authors.forename: Hiroya
authors.initials: H
authors.lastname: Tani
authors.forename: Kunitomo
authors.initials: K
authors.lastname: Watanabe
authors.forename: Hiroshige
authors.initials: H
authors.lastname: Mikamo
mesh_terms: D001431:Bacteriological Techniques / Q000295:instrumentation*; D013292:Streptococcus agalactiae / Q000302:isolation & purification*