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Muigg V, Cuénod A, Purushothaman S, Siegemund M, Wittwer M, Pflüger V, Schmidt KM, Weisser M, Ritz N, Widmer A, Goldenberger D, Hinic V, Roloff T, Søgaard KK, Egli A, Seth-Smith HM. Diagnostic challenges within the Bacillus cereus-group: finding the beast without teeth. New Microbes New Infect 2022; 49-50:101040. [DOI: 10.1016/j.nmni.2022.101040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 10/18/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
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Sapugahawatte DN, Li C, Liyanapathirana V, Kandauda C, Gihan C, Zhu C, Lo NWS, Wong KT, Ip M. Colonization of Group B Streptococcus in Pregnant Women and Their Neonates from a Sri Lankan Hospital. Pathogens 2022; 11:pathogens11040386. [PMID: 35456061 PMCID: PMC9029214 DOI: 10.3390/pathogens11040386] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 03/20/2022] [Accepted: 03/21/2022] [Indexed: 01/25/2023] Open
Abstract
We investigated the molecular epidemiology of Streptococcus agalactiae (Group B Streptococcus, GBS) from carriage in a cohort of pregnant mothers and their respective newborns in a Teaching Hospital in Sri Lanka. GBS vaginal carriage was assessed on pregnant mothers at pre-delivery (n = 250), post-delivery (n = 130), and from peri-rectal swabs of neonates (n = 159) in a prospective study. All colonizing, non-duplicate GBS isolates (n = 60) were analyzed for antimicrobial susceptibilities, capsular serotyping, and whole-genome sequencing (WGS). The percentage of GBS carriage in mothers in the pre-delivery and post-delivery cohorts were 11.2% (n = 28) and 19.2% (n = 25), respectively, and 4.4% (n = 7) in neonates. GBS isolates predominantly belonged to serotype VI (17/60, 28.3%). The isolates spanned across 12 sequence types (STs), with ST1 (24/60, 40%) being the most predominant ST. Concomitant resistance to erythromycin, tetracyclines, and gentamicin was observed in eight strains (13.3%). WGS revealed the presence of antimicrobial resistance genes including ermA (5/60), mefA (1/60), msrD (1/60), and tetLMO (2/60, 28/60, and 1/60, respectively) among 60 strains. The study provides insight into the diversity of vaccine targets of GBS since serotype VI is yet to be covered in the vaccine development program.
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Affiliation(s)
- Dulmini Nanayakkara Sapugahawatte
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Carmen Li
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Veranja Liyanapathirana
- Department of Microbiology, Faculty of Medicine, University of Peradeniya, Peradeniya 20400, Sri Lanka;
| | - Chaminda Kandauda
- Department of Obstetrics and Gynaecology, Faculty of Medicine, University of Peradeniya, Peradeniya 20400, Sri Lanka; (C.K.); (C.G.)
| | - Champika Gihan
- Department of Obstetrics and Gynaecology, Faculty of Medicine, University of Peradeniya, Peradeniya 20400, Sri Lanka; (C.K.); (C.G.)
| | - Chendi Zhu
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Norman Wai Sing Lo
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Kam Tak Wong
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
| | - Margaret Ip
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; (D.N.S.); (C.L.); (C.Z.); (N.W.S.L.); (K.T.W.)
- Correspondence: ; Tel.: +852-3505-3333
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