{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T21:19:07Z","timestamp":1789507147860,"version":"build-2803163510"},"reference-count":50,"publisher":"Microbiology Society","issue":"4","funder":[{"name":"Wesfarmers Centre for Vaccination and Infectious Diseases (WCVID) Seed and Partnership Grant","award":["2021:1"],"award-info":[{"award-number":["2021:1"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,4,3]]},"abstract":"<jats:p>\n                  <jats:bold>Background.<\/jats:bold> Invasive Group B <jats:italic>Streptococcus<\/jats:italic> (GBS; <jats:italic>Streptococcus agalactiae<\/jats:italic>) remains a leading cause of infant morbidity and mortality. Intrapartum antibiotic prophylaxis (IAP) has been implemented in many countries with a reduction in early-onset disease, but an effective vaccine may further reduce the disease burden. Candidate vaccines targeting capsular polysaccharides and surface proteins are now in clinical trials.<\/jats:p>\n               <jats:p>\n                  <jats:bold>Methods.<\/jats:bold> Using whole-genome sequencing and phenotypic antimicrobial susceptibility testing, we characterized sterile-site GBS isolates recovered from Western Australian infants between 2004 and 2020. Characteristics were compared between three time periods: 2004\u20132008, 2009\u20132015 and 2016\u20132020.<\/jats:p>\n               <jats:p>\n                  <jats:bold>Results.<\/jats:bold> A total of 135 isolates were identified. The proportion of serotype III (22.7\u200a% in Period 1 to 47.9\u200a% in Period 3, <jats:italic>P<\/jats:italic>=0.04) and clonal complex 17 (13.6\u201339.6\u200a%, <jats:italic>P<\/jats:italic>=0.01) isolates increased over time. Overall coverage of vaccines currently being trialled was &gt;95\u200a%. No isolates were penicillin resistant (MIC&gt;0.25 mg l<jats:sup>\u20131<\/jats:sup>), but 21.5\u200a% of isolates had reduced penicillin susceptibility (MIC&gt;0.12 mg l<jats:sup>\u20131<\/jats:sup>) and penicillin MIC increased significantly over time (<jats:italic>P<\/jats:italic>=0.04). Clindamycin resistance increased over time to 45.8\u200a% in the latest period.<\/jats:p>\n               <jats:p>\n                  <jats:bold>Conclusions.<\/jats:bold> Based on comprehensive characterization of invasive infant GBS in Western Australia, we found that coverage for leading capsular polysaccharide and surface protein vaccine candidates was high. The demonstrated changes in serotype and molecular type highlight the need for ongoing surveillance, particularly with regard to future GBS vaccination programmes. The reduced susceptibility to IAP agents over time should inform changes to antibiotic guidelines.<\/jats:p>","DOI":"10.1099\/jmm.0.001822","type":"journal-article","created":{"date-parts":[[2024,4,3]],"date-time":"2024-04-03T10:18:20Z","timestamp":1712139500000},"source":"Crossref","is-referenced-by-count":5,"title":["Characterization of invasive Group B Streptococcus isolates from Western Australian infants, 2004\u20132020"],"prefix":"10.1099","volume":"73","author":[{"given":"Ginger","family":"Hilpipre","sequence":"first","affiliation":[{"name":"Department of Microbiology, PathWest Laboratory Medicine, Perth, Western Australia, Australia"},{"name":"School of Medicine, University of Western Australia, Perth, Western Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lucy L.","family":"Furfaro","sequence":"additional","affiliation":[{"name":"Division of Obstetrics and Gynaecology, School of Medicine, The University of Western Australia, Perth, Western Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michelle","family":"Porter","sequence":"additional","affiliation":[{"name":"Department of Microbiology, PathWest Laboratory Medicine, Perth, Western Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher C.","family":"Blyth","sequence":"additional","affiliation":[{"name":"Department of Infectious Diseases, Perth Children\u2019s Hospital, Perth, Western Australia, Australia"},{"name":"School of Medicine, University of Western Australia, Perth, Western Australia, Australia"},{"name":"Department of Microbiology, PathWest Laboratory Medicine, Perth, Western Australia, Australia"},{"name":"Wesfarmers Centre of Vaccines and Infectious Diseases, Telethon Kids Institute, University of Western Australia, Perth, Western Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6284-612X","authenticated-orcid":false,"given":"Daniel K.","family":"Yeoh","sequence":"additional","affiliation":[{"name":"Wesfarmers Centre of Vaccines and Infectious Diseases, Telethon Kids Institute, University of Western Australia, Perth, Western Australia, Australia"},{"name":"Sir Peter MacCallum Department of Oncology, University of Melbourne, Parkville, Victoria, Australia"},{"name":"Department of Infectious Diseases, Perth Children\u2019s Hospital, Perth, Western Australia, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"345","reference":[{"key":"R1","article-title":"Prevention of Group B Streptococcal Early-Onset Disease in Newborns","year":"2022"},{"key":"R2","doi-asserted-by":"publisher","DOI":"10.1093\/cid\/cix663"},{"key":"R3","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM200001063420103"},{"key":"R4","doi-asserted-by":"publisher","DOI":"10.1001\/jamapediatrics.2018.4826"},{"key":"R5","doi-asserted-by":"publisher","DOI":"10.1097\/01.inf.0000128782.20060.79"},{"key":"R6","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0214295"},{"key":"R7","doi-asserted-by":"publisher","DOI":"10.1016\/j.vaccine.2019.07.012"},{"key":"R8","article-title":"Identifier NCT03765073, Trial to Evaluate the Safety, Tolerability, and Immunogenicity of A Multivalent Group B Streptococcus Vaccine in Healthy Nonpregnant Women and Pregnant Women And Their Infants Bethesda, MD: ClinicalTrials.gov","author":"Trials","year":"2018"},{"key":"R9","article-title":"Product Pipeline Copenhagen, Denmark","year":"2021"},{"key":"R10","article-title":"Identifier NCT05154578, Immunogenicity and Safety of GBS-NN\/NN2 in Pregnant Women","author":"Trials","year":"2021"},{"key":"R11","doi-asserted-by":"publisher","DOI":"10.1093\/cid\/ciaa151"},{"key":"R12","doi-asserted-by":"publisher","DOI":"10.1016\/j.vaccine.2020.08.052"},{"key":"R13","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-0691.2007.01914.x"},{"key":"R14","doi-asserted-by":"publisher","DOI":"10.1111\/jpc.12830"},{"key":"R15","doi-asserted-by":"publisher","DOI":"10.1097\/INF.0000000000001345"},{"key":"R16","volume-title":"Performance Standards for Antimicrobial Susceptibility Testing. 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