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Goto R, Jin W, Wachino JI, Arakawa Y, Kimura K. Improved disk diffusion method for simple detection of group B streptococci with reduced penicillin susceptibility (PRGBS). Diagn Microbiol Infect Dis 2023; 105:115881. [PMID: 36586277 DOI: 10.1016/j.diagmicrobio.2022.115881] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 11/21/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
We used 73 group B Streptococcus with reduced penicillin susceptibility (PRGBS) isolates and determined more rational cutoff values of previously developed disk diffusion method for detecting PRGBS using oxacillin, ceftizoxime, and ceftibuten disks. Using the novel cutoff values, the three disks showed high sensitivity and specificity, which were above 90.0%.
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Affiliation(s)
- Rikuko Goto
- Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Wanchun Jin
- Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Jun-Ichi Wachino
- Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Yoshichika Arakawa
- Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Kouji Kimura
- Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.
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van der Linden M, Mamede R, Levina N, Helwig P, Vila-Cerqueira P, Carriço JA, Melo-Cristino J, Ramirez M, Martins ER. Heterogeneity of penicillin-non-susceptible group B streptococci isolated from a single patient in Germany. J Antimicrob Chemother 2021; 75:296-299. [PMID: 31740946 PMCID: PMC6966095 DOI: 10.1093/jac/dkz465] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/10/2019] [Accepted: 10/11/2019] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES Streptococcus agalactiae [group B streptococci (GBS)] have been considered uniformly susceptible to penicillin. However, increasing reports from Asia and North America are documenting penicillin-non-susceptible GBS (PRGBS) with mutations in pbp genes. Here we report, to the best of our knowledge, the first two PRGBS isolates recovered in Europe (AC-13238-1 and AC-13238-2), isolated from the same patient. METHODS Two different colony morphologies of GBS were noted from a surgical abscess drainage sample. Both were serotyped and antimicrobial susceptibility testing was performed by different methodologies. High-throughput sequencing was done to compare the isolates at the genomic level, to identify their capsular type and ST, to evaluate mutations in the pbp genes and to compare the isolates with the genomes of other PRGBS isolates sharing the same serotype and ST. RESULTS Isolates AC-13238-1 and AC-13238-2 presented MICs above the EUCAST and CLSI breakpoints for penicillin susceptibility. Both shared the capsular type Ia operon and ST23. Genomic analysis uncovered differences between the two isolates in seven genes, including altered pbp genes. Deduced amino acid sequences revealed critical substitutions in PBP2X in both isolates. Comparison with serotype Ia clonal complex 23 PRGBS from the USA reinforced the similarity between AC-13238-1 and AC-13238-2, and their divergence from the US strains. CONCLUSIONS Our results support the in-host evolution of β-lactam-resistant GBS, with two PRGBS variants being isolated from one patient.
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Affiliation(s)
- Mark van der Linden
- German National Reference Centre for Streptococci, Department of Medical Microbiology, University Hospital RWTH Aachen, Aachen, Germany
| | - Rafael Mamede
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Natascha Levina
- German National Reference Centre for Streptococci, Department of Medical Microbiology, University Hospital RWTH Aachen, Aachen, Germany
| | - Peter Helwig
- Department of Orthopaedic and Trauma Surgery, Heidenheim Hospital, Heidenheim, Germany
| | - Pedro Vila-Cerqueira
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - João André Carriço
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - José Melo-Cristino
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Mário Ramirez
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Elisabete R Martins
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
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Humphries RM. Group B Streptococcus Dynamics in the United States. Clin Infect Dis 2021; 72:1014-1015. [PMID: 32060524 DOI: 10.1093/cid/ciaa155] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 02/13/2020] [Indexed: 11/14/2022] Open
Affiliation(s)
- Romney M Humphries
- Accelerate Diagnostics, Tucson, Arizona, USA.,Department of Pathology, University of Arizona, Tucson, Arizona, USA
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Bonofiglio L, Gagetti P, García Gabarrot G, Kaufman S, Mollerach M, Toresani I, Vigliarolo L, von Specht M, Lopardo HA. Susceptibility to β-lactams in β-hemolytic streptococci. Rev Argent Microbiol 2018; 50:431-435. [PMID: 29548731 DOI: 10.1016/j.ram.2017.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/18/2017] [Accepted: 11/09/2017] [Indexed: 10/17/2022] Open
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Fukigai S, Morimoto M, Kimura K, Doyama Y, Miyazaki A, Kamiya C, Banno H, Morishima E, Onoda T, Nagano N, Jin W, Wachino JI, Yamada K, Arakawa Y. Effectual detection of group B streptococci with reduced penicillin susceptibility (PRGBS) by commercially available methicillin-resistant-Staphylococcus aureus (MRSA)-selective agar. Diagn Microbiol Infect Dis 2016; 85:309-312. [PMID: 27198740 DOI: 10.1016/j.diagmicrobio.2016.04.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 04/25/2016] [Accepted: 04/27/2016] [Indexed: 10/21/2022]
Abstract
We evaluated the feasibility and efficacy of a commercially available methicillin-resistant Staphylococcus aureus (MRSA)-selective agar, chromID(™) MRSA, to detect group B streptococci with reduced penicillin susceptibility (PRGBS) in this study. The results showed 72.4% (21/29) sensitivity and 98.4% (60/61) specificity to detect PRGBS using this method.
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Affiliation(s)
- Shinako Fukigai
- Division of Microbiology, Department of Clinical Laboratory, Hanyu General Hospital, 551 Kami-iwase, Hanyu, Saitama 348-8505, Japan
| | - Makiko Morimoto
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Kouji Kimura
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan.
| | - Yo Doyama
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Akira Miyazaki
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Chitose Kamiya
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Hirotsugu Banno
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Eriko Morishima
- Division of Microbiology, Department of Clinical Laboratory, Hanyu General Hospital, 551 Kami-iwase, Hanyu, Saitama 348-8505, Japan
| | - Tomohiro Onoda
- Division of Microbiology, Department of Clinical Laboratory, Hanyu General Hospital, 551 Kami-iwase, Hanyu, Saitama 348-8505, Japan
| | - Noriyuki Nagano
- Department of Health and Medical Sciences, Shinshu University Graduate School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan
| | - Wanchun Jin
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Jun-Ichi Wachino
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Keiko Yamada
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Yoshichika Arakawa
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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Seki T, Kimura K, Reid ME, Miyazaki A, Banno H, Jin W, Wachino JI, Yamada K, Arakawa Y. High isolation rate of MDR group B streptococci with reduced penicillin susceptibility in Japan. J Antimicrob Chemother 2015; 70:2725-8. [PMID: 26169560 DOI: 10.1093/jac/dkv203] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 06/16/2015] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES In Japan, the isolation rate of group B Streptococcus (GBS) with reduced penicillin susceptibility (PRGBS) was 2.3% between 2005 and 2006. However, no data on this have been available since then; moreover, the isolation rate of MDR-PRGBS has never been reported. The aim of this study was to obtain recent data on the PRGBS isolation rate and to investigate, for the first time, the isolation rate of MDR-PRGBS. METHODS We collected 306 clinical GBS isolates from various regions in Japan between January 2012 and July 2013. The MICs of penicillin G, oxacillin, ceftizoxime and ceftibuten for all GBS isolates and the MICs of erythromycin and levofloxacin for PRGBS isolates were determined by the agar dilution method. The mutations in the genes involved in antibiotic resistance and antibiotic resistance genes were analysed by PCR and DNA sequencing. RESULTS We detected 45 clinical PRGBS isolates, with a PRGBS isolation rate among GBS of 14.7% (45/306). Among the PRGBS isolates, 32 (32/45, 71.1%) and 43 (43/45, 95.6%) were resistant/non-susceptible to erythromycin and levofloxacin, respectively. Furthermore, 31 PRGBS isolates, which constituted 68.9% of the PRGBS (31/45) and 10.1% of the GBS (31/306), respectively, were resistant/non-susceptible to both macrolides and fluoroquinolones, indicating multidrug resistance. CONCLUSIONS These results suggest that the number of clinical PRGBS isolates with a tendency to multidrug resistance increased rapidly between 2005-06 and 2012-13 in Japan.
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Affiliation(s)
- Tomomi Seki
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Kouji Kimura
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Megan E Reid
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Akira Miyazaki
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Hirotsugu Banno
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Wanchun Jin
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Jun-ichi Wachino
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Keiko Yamada
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Yoshichika Arakawa
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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Kamiya C, Kimura K, Doyama Y, Miyazaki A, Morimoto M, Banno H, Nagano N, Jin W, Wachino JI, Yamada K, Arakawa Y. Ceftibuten-containing agar plate for detecting group B streptococci with reduced penicillin susceptibility (PRGBS). Diagn Microbiol Infect Dis 2015; 82:269-73. [PMID: 25959629 DOI: 10.1016/j.diagmicrobio.2015.04.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 04/22/2015] [Accepted: 04/26/2015] [Indexed: 11/24/2022]
Abstract
Penicillins remain first-line agents for treatment of group B Streptococcus (Streptococcus agalactiae; GBS) infections; however, several reports have confirmed the existence of GBS with reduced penicillin susceptibility (PRGBS). Because no selective agar plates for detection of PRGBS are available to date, in this investigation, we developed the selective agar plate for detection of PRGBS. We used 19 genetically well-confirmed PRGBS isolates and 38 penicillin-susceptible GBS isolates identified in Japan. For preparation of trial PRGBS-selective agar plates, we added 1 of antimicrobial agents (among oxacillin, ceftizoxime, and ceftibuten) to a well-established GBS-selective agar plate. Among 12 trial PRGBS-selective agar plates, Muller-Hinton agar containing 128 μg/mL ceftibuten with 5% sheep blood, 8 μg/mL gentamicin, and 12 μg/mL nalidixic acid was the most appropriate selective agar for PRGBS, showing 100% sensitivity and 81.6% specificity. In cases of potential nosocomial spread of PRGBS, the selective agar plate could be useful and reliable.
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Affiliation(s)
- Chitose Kamiya
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
| | - Kouji Kimura
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan.
| | - Yo Doyama
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
| | - Akira Miyazaki
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
| | - Makiko Morimoto
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
| | - Hirotsugu Banno
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
| | - Noriyuki Nagano
- Department of Health and Medical Sciences, Shinshu University Graduate School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan
| | - Wanchun Jin
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
| | - Jun-ichi Wachino
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
| | - Keiko Yamada
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
| | - Yoshichika Arakawa
- Department of Bacteriology, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan
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Penicillin-susceptible group B streptococcal clinical isolates with reduced cephalosporin susceptibility. J Clin Microbiol 2014; 52:3406-10. [PMID: 24920773 DOI: 10.1128/jcm.01291-14] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
We characterized penicillin-susceptible group B streptococcal (PSGBS) clinical isolates exhibiting no growth inhibition zone around a ceftibuten disk (CTB(r) PSGBS). The CTB(r) PSGBS isolates, for which augmented MICs of cefaclor and ceftizoxime were found, shared a T394A substitution in penicillin-binding protein 2X (PBP 2X) and a T567I substitution in PBP 2B, together with an additional G429S substitution in PBP 2X or a T145A substitution in PBP 1A, although the T145A substitution in the transglycosidase domain of PBP 1A would have no effect on the level of resistance to ceftibuten.
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Kimura K. [Series of studies concerning group B streptococci with reduced penicillin susceptibility (PRGBS)]. Nihon Saikingaku Zasshi 2014; 69:547-555. [PMID: 25447980 DOI: 10.3412/jsb.69.547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Group B Streptococcus (GBS, Streptococcus agalactiae) is the cause of neonatal sepsis and meningitides. Moreover, this bacterium causes invasive infections to elderly people and patients suffering from diabetes et al. All clinical isolates of GBS, similar to other β-hemolytic streptococci, have been considered to be uniformly susceptible to β-lactams since 1940s, when penicillin was introduced to clinical setting. However, we analyzed clinical isolates of group B streptococci with reduced penicillin susceptibility (PRGBS), recovered in Japan during 1995-2005, and established their existence. Moreover, we promote series of studies concerning PRGBS. In this review, we describe series of studies concerning PRGBS.
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Affiliation(s)
- Kouji Kimura
- Department of Bacteriology, Nagoya University Graduate School of Medicine
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