1
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Molecular Epidemiology of Group B Streptococcus Colonization in Egyptian Women. Microorganisms 2022; 11:microorganisms11010038. [PMID: 36677330 PMCID: PMC9861799 DOI: 10.3390/microorganisms11010038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/16/2022] [Accepted: 12/19/2022] [Indexed: 12/25/2022] Open
Abstract
(1) Background: Streptococcus agalactiae or Group B Streptococcus (GBS) causes severe neonatal infections with a high burden of disease, especially in Africa. Maternal vaginal colonization and perinatal transmissions represent the common mode of acquiring the infection. Development of an effective maternal vaccine against GBS relies on molecular surveillance of the maternal GBS population to better understand the global distribution of GBS clones and serotypes. (2) Methods: Here, we present genomic data from a collection of colonizing GBS strains from Ismailia, Egypt that were sequenced and characterized within the global JUNO project. (3) Results: A large proportion of serotype VI, ST14 strains was discovered, a serotype which is rarely found in strain collections from the US and Europe and typically not included in the current vaccine formulations. (4) Conclusions: The molecular epidemiology of these strains clearly points to the African origin with the detection of several sequence types (STs) that have only been observed in Africa. Our data underline the importance of continuous molecular surveillance of the GBS population for future vaccine implementations.
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2
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Aiewsakun P, Ruangchai W, Thawornwattana Y, Jaemsai B, Mahasirimongkol S, Homkaew A, Suksomchit P, Dubbs P, Palittapongarnpim P. Genomic epidemiology of Streptococcus agalactiae ST283 in Southeast Asia. Sci Rep 2022; 12:4185. [PMID: 35264716 PMCID: PMC8907273 DOI: 10.1038/s41598-022-08097-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 02/28/2022] [Indexed: 01/12/2023] Open
Abstract
Streptococcus agalactiae, also known as Lancefield Group B Streptococcus (GBS), is typically regarded as a neonatal pathogen; however, several studies have shown that the bacteria are capable of causing invasive diseases in non-pregnant adults as well. The majority of documented cases were from Southeast Asian countries, and the most common genotype found was ST283, which is also known to be able to infect fish. This study sequenced 12 GBS ST283 samples collected from adult patients in Thailand. Together with publicly available sequences, we performed temporo-spatial analysis and estimated population dynamics of the bacteria. Putative drug resistance genes were also identified and characterized, and the drug resistance phenotypes were validated experimentally. The results, together with historical records, draw a detailed picture of the past transmission history of GBS ST283 in Southeast Asia.
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Affiliation(s)
- Pakorn Aiewsakun
- Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.,Pornchai Matangkasombut Center for Microbial Genomics, Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Wuthiwat Ruangchai
- Pornchai Matangkasombut Center for Microbial Genomics, Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Yuttapong Thawornwattana
- Pornchai Matangkasombut Center for Microbial Genomics, Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Bharkbhoom Jaemsai
- Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Surakameth Mahasirimongkol
- Department of Medical Sciences, Ministry of Public Health, 88/7, Tiwanon Road, Amphoe Muang, Nonthaburi, 11000, Thailand
| | - Anchalee Homkaew
- Microbiological Unit, Central Laboratory and Blood Bank, Faculty of Medicine, Vajira Hospital, Navamindraraj University, Bangkok, Thailand
| | - Paveesuda Suksomchit
- Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Padungsri Dubbs
- Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.
| | - Prasit Palittapongarnpim
- Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.,Pornchai Matangkasombut Center for Microbial Genomics, Department of Microbiology, Faculty of Science, Mahidol University, 272, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.,National Science and Technology Development Agency, Pathumthani, Thailand
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3
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Shabayek S, Ferrieri P, Spellerberg B. Group B Streptococcal Colonization in African Countries: Prevalence, Capsular Serotypes, and Molecular Sequence Types. Pathogens 2021; 10:pathogens10121606. [PMID: 34959562 PMCID: PMC8706430 DOI: 10.3390/pathogens10121606] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/02/2021] [Accepted: 12/07/2021] [Indexed: 11/20/2022] Open
Abstract
Streptococcus agalactiae or group B streptococcus (GBS) is a commensal of the gastrointestinal and genitourinary tracts of healthy women and an important cause of neonatal invasive infections worldwide. Transmission of bacteria to the newborn occurs at birth and can be prevented by intrapartum antibiotic prophylaxis. However, this not available in resource limited settings in Africa, which carries a particular high burden of disease. Serotype based vaccines are in development and present a suitable alternative to prevent neonatal infections. To be able to assess vaccine efficacy, knowledge and surveillance of GBS epidemiological data are required. This review summarizes investigations about the serotype distribution and the multi-locus sequence types (MLST) found in different African countries. While most serotypes and MLST data are comparable to findings from other continents, some specific differences exist. Serotype V is predominant among colonizing maternal strains in many different African countries. Serotypes that are rarely detected in western industrialized nations, such as serotypes VI, VII and IX, are prevalent in studies from Ghana and Egypt. Moreover, some specific MLST sequence types that seem to be more or less unique to Africa have been detected. However, overall, the data confirm that a hexavalent vaccine can provide broad coverage for the African continent and that a protein vaccine could represent a promising alternative.
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Affiliation(s)
- Sarah Shabayek
- Department of Microbiology and Immunology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt;
| | - Patricia Ferrieri
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis, MN 55455, USA;
| | - Barbara Spellerberg
- Institute of Medical Microbiology and Hygiene, University Hospital Ulm, 89081 Ulm, Germany
- Correspondence:
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4
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A'Hearn-Thomas B, Khatami A, Randis TM, Vurayai M, Mokomane M, Arscott-Mills T, Banda FM, Mazhani T, Lepere T, Gaolebale P, Nchingane S, Chamby A, Gegick M, Suzman E, Steenhoff AP, Ratner AJ. High Rate of Serotype V Streptococcus agalactiae Carriage in Pregnant Women in Botswana. Am J Trop Med Hyg 2020; 100:1115-1117. [PMID: 30915949 DOI: 10.4269/ajtmh.18-0847] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Maternal rectovaginal colonization is the major risk factor for early-onset neonatal sepsis due to Group B Streptococcus (GBS), a major cause of early life morbidity and mortality. Transmission generally occurs perinatally from colonized mothers to infants. Vaccines targeting a subset of GBS serotypes are under development, but GBS epidemiology remains poorly understood in many African nations. We performed a cross-sectional study of GBS colonization among pregnant women at two sites in Botswana, a country with minimal prior GBS carriage data. We found a rectovaginal colonization rate of 19%, comparable with studies in other regions; however, we also noted a striking predominance of serotype V (> 45% of strains). Although further studies are required to delineate the burden of invasive GBS disease in Botswana and the generalizability of type V epidemiology, these data provide a useful baseline for understanding the potential local impact of GBS prevention strategies, including vaccines.
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Affiliation(s)
- Brady A'Hearn-Thomas
- Department of Pediatrics, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Ameneh Khatami
- Department of Microbiology, New York University School of Medicine, New York, New York.,Department of Pediatrics, New York University School of Medicine, New York, New York
| | - Tara M Randis
- Department of Microbiology, New York University School of Medicine, New York, New York.,Department of Pediatrics, New York University School of Medicine, New York, New York
| | | | | | - Tonya Arscott-Mills
- Department of Paediatrics and Adolescent Health, Faculty of Medicine, University of Botswana, Gaborone, Botswana.,Children's Hospital of Philadelphia Department of Pediatrics, Botswana-UPenn Partnership and Global Health Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Francis M Banda
- Department of Paediatrics and Adolescent Health, Faculty of Medicine, University of Botswana, Gaborone, Botswana
| | - Tiny Mazhani
- Department of Paediatrics and Adolescent Health, Faculty of Medicine, University of Botswana, Gaborone, Botswana
| | | | | | | | - Anna Chamby
- Department of Microbiology, New York University School of Medicine, New York, New York.,Department of Pediatrics, New York University School of Medicine, New York, New York
| | - Margaret Gegick
- Department of Microbiology, New York University School of Medicine, New York, New York.,Department of Pediatrics, New York University School of Medicine, New York, New York
| | - Evan Suzman
- Department of Microbiology, New York University School of Medicine, New York, New York.,Department of Pediatrics, New York University School of Medicine, New York, New York
| | - Andrew P Steenhoff
- Division of Pediatric Infectious Diseases, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,Department of Paediatrics and Adolescent Health, Faculty of Medicine, University of Botswana, Gaborone, Botswana.,Children's Hospital of Philadelphia Department of Pediatrics, Botswana-UPenn Partnership and Global Health Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Adam J Ratner
- Department of Microbiology, New York University School of Medicine, New York, New York.,Department of Pediatrics, New York University School of Medicine, New York, New York
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5
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Lopes E, Fernandes T, Machado MP, Carriço JA, Melo-Cristino J, Ramirez M, Martins ER. Increasing macrolide resistance among Streptococcus agalactiae causing invasive disease in non-pregnant adults was driven by a single capsular-transformed lineage, Portugal, 2009 to 2015. ACTA ACUST UNITED AC 2019; 23. [PMID: 29845930 PMCID: PMC6152215 DOI: 10.2807/1560-7917.es.2018.23.21.1700473] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We characterised Lancefield group B streptococcal (GBS) isolates causing invasive disease among non-pregnant adults in Portugal between 2009 and 2015. All isolates (n = 555) were serotyped, assigned to clonal complexes (CCs) by multilocus sequence typing and characterised by surface protein and pilus island gene profiling. Antimicrobial susceptibility was tested by disk diffusion and resistance genotypes identified by PCR. Overall, serotype Ia was most frequent in the population (31%), followed by serotypes Ib (24%) and V (18%). Serotype Ib increased significantly throughout the study period (p < 0.001) to become the most frequent serotype after 2013. More than 40% of isolates clustered in the CC1/alp3/PI-1+PI-2a genetic lineage, including most isolates of serotypes Ib (n = 110) and V (n = 65). Erythromycin and clindamycin resistance rates were 35% and 34%, respectively, both increasing from 2009 to 2015 (p < 0.010) and associated with CC1 and serotype Ib (p < 0.001). The Ib/CC1 lineage probably resulted from acquisition of the type Ib capsular operon in a single recombination event by a representative of the V/CC1 macrolide-resistant lineage. Expansion of the new serotype Ib/CC1 lineage resulted in increased macrolide resistance in GBS, causing invasive disease among adults in Portugal. The presence of this clone elsewhere may predict more widespread increase in resistance.
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Affiliation(s)
- Elísia Lopes
- These authors contributed equally to this work.,Institute of Microbiology, Institute of Molecular Medicine, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
| | - Tânia Fernandes
- These authors contributed equally to this work.,Institute of Microbiology, Institute of Molecular Medicine, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
| | - Miguel P Machado
- Institute of Microbiology, Institute of Molecular Medicine, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
| | - João André Carriço
- Institute of Microbiology, Institute of Molecular Medicine, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
| | - José Melo-Cristino
- Institute of Microbiology, Institute of Molecular Medicine, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
| | - Mário Ramirez
- Institute of Microbiology, Institute of Molecular Medicine, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
| | - Elisabete R Martins
- Institute of Microbiology, Institute of Molecular Medicine, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
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- The members of group are listed at the end of the article
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6
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Chen SL. Genomic Insights Into the Distribution and Evolution of Group B Streptococcus. Front Microbiol 2019; 10:1447. [PMID: 31316488 PMCID: PMC6611187 DOI: 10.3389/fmicb.2019.01447] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 06/11/2019] [Indexed: 01/31/2023] Open
Abstract
Streptococcus agalactiae, also known as Group B Streptococcus (GBS), is a bacteria with truly protean biology. It infects a variety of hosts, among which the most commonly studied are humans, cattle, and fish. GBS holds a singular position in the history of bacterial genomics, as it was the substrate used to describe one of the first major conceptual advances of comparative genomics, the idea of the pan-genome. In this review, I describe a brief history of GBS and the major contributions of genomics to understanding its genome plasticity and evolution as well as its molecular epidemiology, focusing on the three hosts mentioned above. I also discuss one of the major recent paradigm shifts in our understanding of GBS evolution and disease burden: foodborne GBS can cause invasive infections in humans.
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Affiliation(s)
- Swaine L Chen
- Division of Infectious Diseases, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Infectious Diseases Group, Genome Institute of Singapore, Singapore, Singapore
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7
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Barkham T, Zadoks RN, Azmai MNA, Baker S, Bich VTN, Chalker V, Chau ML, Dance D, Deepak RN, van Doorn HR, Gutierrez RA, Holmes MA, Huong LNP, Koh TH, Martins E, Mehershahi K, Newton P, Ng LC, Phuoc NN, Sangwichian O, Sawatwong P, Surin U, Tan TY, Tang WY, Thuy NV, Turner P, Vongsouvath M, Zhang D, Whistler T, Chen SL. One hypervirulent clone, sequence type 283, accounts for a large proportion of invasive Streptococcus agalactiae isolated from humans and diseased tilapia in Southeast Asia. PLoS Negl Trop Dis 2019; 13:e0007421. [PMID: 31246981 PMCID: PMC6597049 DOI: 10.1371/journal.pntd.0007421] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 04/29/2019] [Indexed: 12/11/2022] Open
Abstract
Background In 2015, Singapore had the first and only reported foodborne outbreak of invasive disease caused by the group B Streptococcus (GBS; Streptococcus agalactiae). Disease, predominantly septic arthritis and meningitis, was associated with sequence type (ST)283, acquired from eating raw farmed freshwater fish. Although GBS sepsis is well-described in neonates and older adults with co-morbidities, this outbreak affected non-pregnant and younger adults with fewer co-morbidities, suggesting greater virulence. Before 2015 ST283 had only been reported from twenty humans in Hong Kong and two in France, and from one fish in Thailand. We hypothesised that ST283 was causing region-wide infection in Southeast Asia. Methodology/Principal findings We performed a literature review, whole genome sequencing on 145 GBS isolates collected from six Southeast Asian countries, and phylogenetic analysis on 7,468 GBS sequences including 227 variants of ST283 from humans and animals. Although almost absent outside Asia, ST283 was found in all invasive Asian collections analysed, from 1995 to 2017. It accounted for 29/38 (76%) human isolates in Lao PDR, 102/139 (73%) in Thailand, 4/13 (31%) in Vietnam, and 167/739 (23%) in Singapore. ST283 and its variants were found in 62/62 (100%) tilapia from 14 outbreak sites in Malaysia and Vietnam, in seven fish species in Singapore markets, and a diseased frog in China. Conclusions GBS ST283 is widespread in Southeast Asia, where it accounts for a large proportion of bacteraemic GBS, and causes disease and economic loss in aquaculture. If human ST283 is fishborne, as in the Singapore outbreak, then GBS sepsis in Thailand and Lao PDR is predominantly a foodborne disease. However, whether transmission is from aquaculture to humans, or vice versa, or involves an unidentified reservoir remains unknown. Creation of cross-border collaborations in human and animal health are needed to complete the epidemiological picture. An outbreak due to a bacterium called Streptococccus agalactiae in Singapore in 2015 was caused by a clone called ST283, and was associated with consumption of raw freshwater-fish. It was considered unique as it was the only reported foodborne outbreak of this bacterium. Our new data show that invasive ST283 disease is far from unique. ST283 has been causing disease in humans and farmed fish in SE Asian countries for decades. Reports of ST283 are almost absent outside Asia. We suspect that human ST283 is fishborne in other Asian countries, as it was in Singapore, but we haven’t looked at this yet. We don’t know where ST283 originally came from; it may have been transmitted from humans to fish, or come from another animal. More studies are needed to determine ST283’s geographical extent and burden of disease, as well as its origin, how it is transmitted, and what enables it to be so aggressive. We may then be able to interrupt transmission, to the benefit of fish, farmers, and the general public.
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Affiliation(s)
- Timothy Barkham
- Department of Laboratory Medicine, Tan Tock Seng Hospital, Singapore
- * E-mail: (TB); (SLC)
| | - Ruth N. Zadoks
- Institute of Biodiversity Animal Health and Comparative Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Mohammad Noor Amal Azmai
- Department of Biology, Faculty of Science, and Laboratory of Marine Biotechnology, Institute of Bioscience, Universiti Putra Malaysia, Selangor, Malaysia
| | - Stephen Baker
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Vu Thi Ngoc Bich
- Centre for Tropical Medicine, Oxford University Clinical Research Unit, Hanoi, Vietnam
| | | | - Man Ling Chau
- Environmental Health Institute, National Environment Agency, Singapore
- National Centre for Food Science, Singapore Food Agency, Singapore
| | - David Dance
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Mahosot Hospital, Vientiane, Lao People’s Democratic Republic
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | | | - H. Rogier van Doorn
- Oxford University Clinical Research Unit, Hanoi, Vietnam
- Nuffield Department of Clinical Medicine, Centre for Tropical Medicine and Global Health, University of Oxford, United Kingdom
| | - Ramona A. Gutierrez
- Environmental Health Institute, National Environment Agency, Singapore
- National Centre for Infectious Diseases, Singapore
| | - Mark A. Holmes
- Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | | | - Tse Hsien Koh
- Department of Microbiology, Singapore General Hospital, Singapore
| | - Elisabete Martins
- Instituto de Microbiologia, Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Kurosh Mehershahi
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Paul Newton
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Mahosot Hospital, Vientiane, Lao People’s Democratic Republic
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Lee Ching Ng
- Environmental Health Institute, National Environment Agency, Singapore
| | - Nguyen Ngoc Phuoc
- Faculty of Fisheries, University of Agriculture and Forestry, Hue University, Hue City, Vietnam
| | - Ornuma Sangwichian
- Thailand Ministry of Public Health (MOPH)-US Centers for Disease Control and Prevention Collaboration (TUC), Nonthaburi, Thailand
| | - Pongpun Sawatwong
- Thailand Ministry of Public Health (MOPH)-US Centers for Disease Control and Prevention Collaboration (TUC), Nonthaburi, Thailand
| | - Uraiwan Surin
- Nakhon Phanom General Hospital, Nakhon Phanom Provincial Health Office, Nakhon Phanom, Thailand
| | - Thean Yen Tan
- Department of Laboratory Medicine, Changi General Hospital, Singapore
| | - Wen Ying Tang
- Molecular Biology Laboratory, Tan Tock Seng Hospital, Singapore
| | - Nguyen Vu Thuy
- National Hospital for Obstetrics & Gynaecology, Hanoi, Vietnam
| | - Paul Turner
- Nuffield Department of Clinical Medicine, Centre for Tropical Medicine and Global Health, University of Oxford, United Kingdom
- Cambodia-Oxford Medical Research Unit, Angkor Hospital for Children, Siem Reap, Cambodia
| | - Manivanh Vongsouvath
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Mahosot Hospital, Vientiane, Lao People’s Democratic Republic
| | - Defeng Zhang
- Key Laboratory of Tropical & Subtropical Fishery Resource Application & Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, People’s Republic of China
| | - Toni Whistler
- Thailand Ministry of Public Health (MOPH)-US Centers for Disease Control and Prevention Collaboration (TUC), Nonthaburi, Thailand
- Division of Global Health Protection, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Swaine L. Chen
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Infectious Diseases Group, Genome Institute of Singapore, Singapore
- * E-mail: (TB); (SLC)
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8
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Lu B, Wu J, Chen X, Gao C, Yang J, Li Y, Wang J, Zeng J, Fang Y, Wang D, Cui Y, Wang L. Microbiological and clinical characteristics of Group B Streptococcus isolates causing materno-neonatal infections: high prevalence of CC17/PI-1 and PI-2b sublineage in neonatal infections. J Med Microbiol 2018; 67:1551-1559. [PMID: 30265233 DOI: 10.1099/jmm.0.000849] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
PURPOSE Group B Streptococcus (GBS) is one of the major pathogens in severe materno-neonatal infections. We aimed to describe the clinical and molecular characteristics of GBS isolates causing infections in 45 maternal and 50 neonatal subjects, collected from eight healthcare centres in mainland China over the period 2010- 2017. METHODOLOGY The phenotypic and genotypic features of the GBS isolates, including capsular polysaccharide (cps) serotypes, pilus island (PI) genes and antibiotic resistance profiles and genes, were characterized by both conventional and molecular methods. The clonal relationship between these strains was investigated using multilocus sequence typing (MLST). RESULTS Of the 95 isolates, the predominant serotypes were III (51, 53.7 %), V (13, 13.7 %) and Ib (13, 13.7 %). All GBS strains carried at least one pilus island, with 32.6 % carrying PI-2b and 67.4 % PI-2a, singly or in combination. The most frequently-detected pilus island pattern was the combination of PI-1 and PI-2a, accounting for 56.8 % (54 isolates), followed by PI-1 combined with PI-2b (28, 29.5 %), PI-2a (10, 10.5 %) and PI-2b (3, 3.2 %). The strains were classified into 17 individual sequence types, and further clustered into six clonal complexes (CCs). A high prevalence of CC17/PI-1 and PI-2b (17, 34.0 %) was detected in 50 GBS isolates causing neonatal infections. No strain was resistant to penicillin, ampicillin, ceftriaxone or vancomycin, whereas 78.9, 76.8 and 81.5 % were resistant to erythromycin, clindamycin and tetracycline, respectively. CONCLUSION Our study highlights the high genotypic diversity of GBS strains causing materno-neonatal infections, and the CC17/PI-1 and PI-2b sublineages should be noted in neonatal infections.
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Affiliation(s)
- Binghuai Lu
- 1Laboratory of Clinical Microbiology and Infectious Diseases, Department of Pulmonary and Critical Care Medicine, Center for Respiratory Diseases, China-Japan Friendship Hospital; National Clinical Research Center of Respiratory Diseases, Beijing,100029, PR China
| | - Jianning Wu
- 2Department of Laboratory Medicine, Xiamen Maternal and Child Health Hospital, Xiamen, 361003, PR China
| | - Xingchun Chen
- 3Department of Laboratory Medicine, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530021, PR China
| | - Chunyan Gao
- 4Department of Laboratory Medicine, Tangshan Maternal and Child Health Care Hospital, Tangshan, 063000, PR China
| | - Junwen Yang
- 5Department of Laboratory Medicine, Zhengzhou children's hospital, Zhengzhou, 450018, PR China
| | - Yi Li
- 6Department of Laboratory Medicine, Henan Provincial People's Hospital, Zhengzhou, 450003, PR China
| | - Junrui Wang
- 7Department of clinical laboratory, Affiliated hospital of Inner Mongolia medical university, Hohhot, 010050, PR China
| | - Ji Zeng
- 8Department of Laboratory Medicine, Wuhan Pu Ai Hospital of Huazhong University of Science and Technology, Wuhan, 430034, PR China
| | - Yujie Fang
- 9National Institute for Communicable Disease Control and Prevention, and State Key Laboratory for Infectious Disease Prevention and Control, Chinese Centre for Disease Control and Prevention, Beijing 102206, PR China.,10Collaborative Innovation Centre for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, PR China
| | - Duochun Wang
- 9National Institute for Communicable Disease Control and Prevention, and State Key Laboratory for Infectious Disease Prevention and Control, Chinese Centre for Disease Control and Prevention, Beijing 102206, PR China.,10Collaborative Innovation Centre for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, PR China
| | - Yanchao Cui
- 11Department of Laboratory Medicine, Civil Aviation General Hospital, Beijing, 100123, PR China
| | - Lijun Wang
- 12Department of Laboratory Medicine, Beijing Tsinghua Chang Gung Hospital, Tsinghua University, Beijing, 102218, PR China
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9
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Kalimuddin S, Chen SL, Lim CTK, Koh TH, Tan TY, Kam M, Wong CW, Mehershahi KS, Chau ML, Ng LC, Tang WY, Badaruddin H, Teo J, Apisarnthanarak A, Suwantarat N, Ip M, Holden MTG, Hsu LY, Barkham T. 2015 Epidemic of Severe Streptococcus agalactiae Sequence Type 283 Infections in Singapore Associated With the Consumption of Raw Freshwater Fish: A Detailed Analysis of Clinical, Epidemiological, and Bacterial Sequencing Data. Clin Infect Dis 2018; 64:S145-S152. [PMID: 28475781 DOI: 10.1093/cid/cix021] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Background Streptococcus agalactiae (group B Streptococcus [GBS]) has not been described as a foodborne pathogen. However, in 2015, a large outbreak of severe invasive sequence type (ST) 283 GBS infections in adults epidemiologically linked to the consumption of raw freshwater fish occurred in Singapore. We attempted to determine the scale of the outbreak, define the clinical spectrum of disease, and link the outbreak to contaminated fish. Methods Time-series analysis was performed on microbiology laboratory data. Food handlers and fishmongers were screened for enteric carriage of GBS. A retrospective cohort study was conducted to assess differences in demographic and clinical characteristics of patients with invasive ST283 and non-ST283 infections. Whole-genome sequencing was performed on human and fish ST283 isolates from Singapore, Thailand, and Hong Kong. Results The outbreak was estimated to have started in late January 2015. Within the study cohort of 408 patients, ST283 accounted for 35.8% of cases. Patients with ST283 infection were younger and had fewer comorbidities but were more likely to develop meningoencephalitis, septic arthritis, and spinal infection. Of 82 food handlers and fishmongers screened, none carried ST283. Culture of 43 fish samples yielded 13 ST283-positive samples. Phylogenomic analysis of 161 ST283 isolates from humans and fish revealed they formed a tight clade distinguished by 93 single-nucleotide polymorphisms. Conclusions ST283 is a zoonotic GBS clone associated with farmed freshwater fish, capable of causing severe disease in humans. It caused a large foodborne outbreak in Singapore and poses both a regional and potentially more widespread threat.
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Affiliation(s)
| | - Swaine L Chen
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore.,Genome Institute of Singapore
| | - Cindy T K Lim
- Saw Swee Hock School of Public Health, National University Singapore
| | | | - Thean Yen Tan
- Department of Laboratory Medicine, Changi General Hospital, Singapore
| | - Michelle Kam
- Department of Internal Medicine, Singapore General Hospital
| | | | - Kurosh S Mehershahi
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore
| | - Man Ling Chau
- Environmental Health Institute, National Environment Agency
| | - Lee Ching Ng
- Environmental Health Institute, National Environment Agency
| | - Wen Ying Tang
- Department of Laboratory Medicine, Tan Tock Seng Hospital
| | | | - Jeanette Teo
- Department of Laboratory Medicine, Microbiology Unit, National University Hospital, Singapore
| | | | - Nuntra Suwantarat
- Infectious Disease Division, Thammasat University Hospital, and.,Chulabhorn International College of Medicine, Thammasat University, Pathumthani, Thailand
| | - Margaret Ip
- Department of Microbiology, Chinese University of Hong Kong, Shatin; and
| | | | - Li Yang Hsu
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore.,Saw Swee Hock School of Public Health, National University Singapore
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10
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Breurec S, Bouchiat C, Sire JM, Moquet O, Bercion R, Cisse MF, Glaser P, Ndiaye O, Ka S, Salord H, Seck A, Sy HS, Michel R, Garin B. High third-generation cephalosporin resistant Enterobacteriaceae prevalence rate among neonatal infections in Dakar, Senegal. BMC Infect Dis 2016; 16:587. [PMID: 27765017 PMCID: PMC5072384 DOI: 10.1186/s12879-016-1935-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 10/15/2016] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Neonatal infection constitutes one of Senegal's most important public health problems, with a mortality rate of 41 deaths per 1,000 live births. METHODS Between January 2007 and March 2008, 242 neonates with suspected infection were recruited at three neonatal intensive care units in three major tertiary care centers in Dakar, the capital of Senegal. Neonatal infections were confirmed by positive bacterial blood or cerebrospinal fluid culture. The microbiological pattern of neonatal infections and the antibiotic susceptibility of the isolates were characterized. In addition, the genetic basis for antibiotic resistance and the genetic background of third-generation cephalosporin-resistant (3GC-R) Enterobacteriaceae were studied. RESULTS A bacteriological infection was confirmed in 36.4 % (88/242) of neonates: 22.7 % (30/132) during the early-onset and 52.7 % (58/110) during the late-onset periods (p > 0.20). Group B streptococci accounted for 6.8 % of the 88 collected bacterial isolates, while most of them were Enterobacteriaceae (n = 69, 78.4 %). Of these, 55/69 (79.7 %) were 3GC-R. The bla CTX-M-15 allele, the bla SHV and the bla TEM were highly prevalent (63.5, 65.4 and 53.8 %, respectively), usually associated with qnr genes (65.4 %). Clonally related strains of 3GC-R Klebsiella pneumoniae and 3GC-R Enterobacter cloacae, the two most commonly recovered 3GC-R Enterobacteriaceae (48/55), were detected at the three hospitals, underlining the role of cross-transmission in their spread. The overall case fatality rate was 18.6 %. CONCLUSIONS Measures should be taken to prevent nosocomial infections and the selection of resistant bacteria.
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Affiliation(s)
- Sebastien Breurec
- Institut Pasteur, Laboratoire de Bactériologie, 36 Avenue Pasteur, BP220, Dakar, Senegal. .,Centre Hospitalier Universitaire de Pointe-à-Pitre/les Abymes, Laboratoire de Microbiologie clinique et environnementale, BP465, 97159, Pointe-à-Pitre, Guadeloupe, France. .,Faculté de Médecine, Université des Antilles, Campus de Fouillole, BP 145, 97154, Pointe-à-Pitre, Guadeloupe, France.
| | - Coralie Bouchiat
- Institut Pasteur, Laboratoire de Bactériologie, 36 Avenue Pasteur, BP220, Dakar, Senegal
| | - Jean-Marie Sire
- Institut Pasteur, Laboratoire de Bactériologie, 36 Avenue Pasteur, BP220, Dakar, Senegal
| | - Olivier Moquet
- Institut Pasteur, Laboratoire de Bactériologie, 36 Avenue Pasteur, BP220, Dakar, Senegal
| | - Raymond Bercion
- Institut Pasteur, Laboratoire de Bactériologie, 36 Avenue Pasteur, BP220, Dakar, Senegal
| | - Moussa Fafa Cisse
- Hôpital des Enfants Albert Royer, Laboratoire de Bactériologie, Avenue Cheikh Anta Diop, Dakar, Senegal
| | - Philippe Glaser
- Institut Pasteur, Unité de Biologie des Bactéries pathogènes à Gram-positif, 25-28 Rue du Dr Roux, 75015, Paris, France
| | - Ousmane Ndiaye
- Département de Pédiatrie, Centre Hospitalier Abass Ndao, BP 15872, Dakar, Senegal
| | - Sidy Ka
- Département de Pédiatrie, Hôpital Principal, 1 avenue Nelson Mandela, BP3006, Dakar, Senegal
| | - Helene Salord
- Hôpital de la Croix-Rousse, Laboratoire de Bactériologie, 103 Grande rue de la Croix-Rousse, 69317, Lyon, France
| | - Abdoulaye Seck
- Institut Pasteur, Laboratoire de Bactériologie, 36 Avenue Pasteur, BP220, Dakar, Senegal
| | - Haby Signate Sy
- Département de Pédiatrie, Hôpital des Enfants Albert Royer, Avenue Cheikh Anta Diop, Dakar, Senegal
| | - Remy Michel
- Institut Pasteur de Dakar, Unité d'Epidémiologie, 36 Avenue Pasteur, BP220, Dakar, Senegal
| | - Benoit Garin
- Institut Pasteur, Laboratoire de Bactériologie, 36 Avenue Pasteur, BP220, Dakar, Senegal
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11
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Maternal colonization with Streptococcus agalactiae and associated stillbirth and neonatal disease in coastal Kenya. Nat Microbiol 2016; 1:16067. [PMID: 27572968 DOI: 10.1038/nmicrobiol.2016.67] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Accepted: 04/16/2016] [Indexed: 12/20/2022]
Abstract
Streptococcus agalactiae (group B streptococcus, GBS) causes neonatal disease and stillbirth, but its burden in sub-Saharan Africa is uncertain. We assessed maternal recto-vaginal GBS colonization (7,967 women), stillbirth and neonatal disease. Whole-genome sequencing was used to determine serotypes, sequence types and phylogeny. We found low maternal GBS colonization prevalence (934/7,967, 12%), but comparatively high incidence of GBS-associated stillbirth and early onset neonatal disease (EOD) in hospital (0.91 (0.25-2.3)/1,000 births and 0.76 (0.25-1.77)/1,000 live births, respectively). However, using a population denominator, EOD incidence was considerably reduced (0.13 (0.07-0.21)/1,000 live births). Treated cases of EOD had very high case fatality (17/36, 47%), especially within 24 h of birth, making under-ascertainment of community-born cases highly likely, both here and in similar facility-based studies. Maternal GBS colonization was less common in women with low socio-economic status, HIV infection and undernutrition, but when GBS-colonized, they were more probably colonized by the most virulent clone, CC17. CC17 accounted for 267/915 (29%) of maternal colonizing (265/267 (99%) serotype III; 2/267 (0.7%) serotype IV) and 51/73 (70%) of neonatal disease cases (all serotype III). Trivalent (Ia/II/III) and pentavalent (Ia/Ib/II/III/V) vaccines would cover 71/73 (97%) and 72/73 (99%) of disease-causing serotypes, respectively. Serotype IV should be considered for inclusion, with evidence of capsular switching in CC17 strains.
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12
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Belard S, Toepfner N, Capan-Melser M, Mombo-Ngoma G, Zoleko-Manego R, Groger M, Matsiegui PB, Agnandji ST, Adegnika AA, González R, Kremsner PG, Menendez C, Ramharter M, Berner R. Streptococcus agalactiae Serotype Distribution and Antimicrobial Susceptibility in Pregnant Women in Gabon, Central Africa. Sci Rep 2015; 5:17281. [PMID: 26603208 PMCID: PMC4658565 DOI: 10.1038/srep17281] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 09/28/2015] [Indexed: 11/17/2022] Open
Abstract
Neonatal invasive disease due to Streptococcus agalactiae is life threatening and preventive strategies suitable for resource limited settings are urgently needed. Protective coverage of vaccine candidates based on capsular epitopes will relate to local epidemiology of S. agalactiae serotypes and successful management of critical infections depends on timely therapy with effective antibiotics. This is the first report on serotype distribution and antimicrobial susceptibility of S. agalactiae in pregnant women from a Central African region. Serotypes V, III, and Ib accounted for 88/109 (81%) serotypes and all isolates were susceptible to penicillin and clindamycin while 13% showed intermediate susceptibility to erythromycin.
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Affiliation(s)
- Sabine Belard
- Centre de Recherches Médicales de Lambaréné, Hôpital Albert Schweitzer, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,Department of Pediatric Pneumology and Immunology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Nicole Toepfner
- Clinic and Polyclinic for Pediatrics and Adolescent Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Mesküre Capan-Melser
- Centre de Recherches Médicales de Lambaréné, Hôpital Albert Schweitzer, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Ghyslain Mombo-Ngoma
- Centre de Recherches Médicales de Lambaréné, Hôpital Albert Schweitzer, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,Département de Parasitologie, Université des Sciences de la Santé, Libreville, Gabon
| | - Rella Zoleko-Manego
- Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,Ngounie Medical Research Centre, Fougamou, Gabon
| | - Mirjam Groger
- Centre de Recherches Médicales de Lambaréné, Hôpital Albert Schweitzer, Lambaréné, Gabon.,Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | | | - Selidji T Agnandji
- Centre de Recherches Médicales de Lambaréné, Hôpital Albert Schweitzer, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Ayôla A Adegnika
- Centre de Recherches Médicales de Lambaréné, Hôpital Albert Schweitzer, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Raquel González
- ISGlobal, Barcelona Ctr. Int. Health Res (CRESIB), Hospital Clínic- Universitat de Barcelona), Barcelona, Spain
| | - Peter G Kremsner
- Centre de Recherches Médicales de Lambaréné, Hôpital Albert Schweitzer, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany
| | - Clara Menendez
- ISGlobal, Barcelona Ctr. Int. Health Res (CRESIB), Hospital Clínic- Universitat de Barcelona), Barcelona, Spain
| | - Michael Ramharter
- Centre de Recherches Médicales de Lambaréné, Hôpital Albert Schweitzer, Lambaréné, Gabon.,Institut für Tropenmedizin, Universität Tübingen, Tübingen, Germany.,Department of Medicine I, Division of Infectious Diseases and Tropical Medicine, Medical University of Vienna, Vienna, Austria
| | - Reinhard Berner
- Clinic and Polyclinic for Pediatrics and Adolescent Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
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13
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Bergal A, Loucif L, Benouareth DE, Bentorki AA, Abat C, Rolain JM. Molecular epidemiology and distribution of serotypes, genotypes, and antibiotic resistance genes of Streptococcus agalactiae clinical isolates from Guelma, Algeria and Marseille, France. Eur J Clin Microbiol Infect Dis 2015; 34:2339-48. [PMID: 26415872 DOI: 10.1007/s10096-015-2487-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 09/03/2015] [Indexed: 02/05/2023]
Abstract
This study describes, for the first time, the genetic and phenotypic diversity among 93 Streptococcus agalactiae (group B Streptococcus, GBS) isolates collected from Guelma, Algeria and Marseille, France. All strains were identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The molecular support of antibiotic resistance and serotyping were investigated by polymerase chain reaction (PCR). The phylogenetic lineage of each GBS isolate was determined by multilocus sequence typing (MLST) and grouped into clonal complexes (CCs) using eBURST. The isolates represented 37 sequence types (STs), 16 of which were novel, grouped into five CCs, and belonging to seven serotypes. Serotype V was the most prevalent serotype in our collection (44.1%). GBS isolates of each serotype were distributed among multiple CCs, including cps III/CC19, cps V/CC1, cps Ia/CC23, cps II/CC10, and cps III/CC17. All isolates presented susceptibility to penicillin, whereas resistance to erythromycin was detected in 40% and tetracycline in 82.2% of isolates. Of the 37 erythromycin-resistant isolates, 75.7% showed the macrolide-lincosamide-streptogramin B (MLSB)-resistant phenotype and 24.3% exhibited the macrolide (M)-resistant phenotype. Constitutive MLSB resistance (46%) mediated by the ermB gene was significantly associated with the Guelma isolates, whereas the M resistance phenotype (24.3%) mediated by the mefA/E gene dominated among the Marseille isolates and belonged to ST-23. Tetracycline resistance was predominantly due to tetM, which was detected alone (95.1%) or associated with tetO (3.7%). These results provide epidemiological data in these regions that establish a basis for monitoring increased resistance to erythromycin and also provide insight into correlations among clones, serotypes, and resistance genes.
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Affiliation(s)
- A Bergal
- Facultés de Médecine et de Pharmacie, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63 CNRS 7278 IRD 198 INSERM U1905, IHU Méditerranée Infection, Marseille, France.,Département d'Écologie et Génie de l'Environnement, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre et de l'Univers, Université 8 Mai 1945, Guelma, Algeria
| | - L Loucif
- Facultés de Médecine et de Pharmacie, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63 CNRS 7278 IRD 198 INSERM U1905, IHU Méditerranée Infection, Marseille, France.,Laboratoire de Biotechnologie des Molécules Bioactives et de la Physiopathologie Cellulaire (LBMBPC), Université El Hadj Lakhdar, Batna, Algeria
| | - D E Benouareth
- Département d'Écologie et Génie de l'Environnement, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre et de l'Univers, Université 8 Mai 1945, Guelma, Algeria
| | - A A Bentorki
- Laboratoire de Microbiologie, CHU Dorban, Annaba, Algeria
| | - C Abat
- Facultés de Médecine et de Pharmacie, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63 CNRS 7278 IRD 198 INSERM U1905, IHU Méditerranée Infection, Marseille, France
| | - J-M Rolain
- Facultés de Médecine et de Pharmacie, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63 CNRS 7278 IRD 198 INSERM U1905, IHU Méditerranée Infection, Marseille, France.
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14
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Lier C, Baticle E, Horvath P, Haguenoer E, Valentin AS, Glaser P, Mereghetti L, Lanotte P. Analysis of the type II-A CRISPR-Cas system of Streptococcus agalactiae reveals distinctive features according to genetic lineages. Front Genet 2015; 6:214. [PMID: 26124774 PMCID: PMC4466440 DOI: 10.3389/fgene.2015.00214] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 06/01/2015] [Indexed: 12/12/2022] Open
Abstract
CRISPR-Cas systems (clustered regularly interspaced short palindromic repeats/CRISPR-associated proteins) are found in 90% of archaea and about 40% of bacteria. In this original system, CRISPR arrays comprise short, almost unique sequences called spacers that are interspersed with conserved palindromic repeats. These systems play a role in adaptive immunity and participate to fight non-self DNA such as integrative and conjugative elements, plasmids, and phages. In Streptococcus agalactiae, a bacterium implicated in colonization and infections in humans since the 1960s, two CRISPR-Cas systems have been described. A type II-A system, characterized by proteins Cas9, Cas1, Cas2, and Csn2, is ubiquitous, and a type I–C system, with the Cas8c signature protein, is present in about 20% of the isolates. Unlike type I–C, which appears to be non-functional, type II-A appears fully functional. Here we studied type II-A CRISPR-cas loci from 126 human isolates of S. agalactiae belonging to different clonal complexes that represent the diversity of the species and that have been implicated in colonization or infection. The CRISPR-cas locus was analyzed both at spacer and repeat levels. Major distinctive features were identified according to the phylogenetic lineages previously defined by multilocus sequence typing, especially for the sequence type (ST) 17, which is considered hypervirulent. Among other idiosyncrasies, ST-17 shows a significantly lower number of spacers in comparison with other lineages. This characteristic could reflect the peculiar virulence or colonization specificities of this lineage.
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Affiliation(s)
- Clément Lier
- UMR1282 Infectiologie et Santé Publique, Bactéries et Risque Materno-Foetal, Université de Tours, Tours France ; INRA, UMR1282 Infectiologie et Santé Publique, Nouzilly France ; Service de Bactériologie-Virologie, Hôpital Bretonneau - Centre Hospitalier Régional et Universitaire de Tours, Tours France
| | - Elodie Baticle
- Service de Bactériologie-Virologie, Hôpital Bretonneau - Centre Hospitalier Régional et Universitaire de Tours, Tours France
| | | | - Eve Haguenoer
- UMR1282 Infectiologie et Santé Publique, Bactéries et Risque Materno-Foetal, Université de Tours, Tours France ; INRA, UMR1282 Infectiologie et Santé Publique, Nouzilly France
| | - Anne-Sophie Valentin
- UMR1282 Infectiologie et Santé Publique, Bactéries et Risque Materno-Foetal, Université de Tours, Tours France ; INRA, UMR1282 Infectiologie et Santé Publique, Nouzilly France ; Service de Bactériologie-Virologie, Hôpital Bretonneau - Centre Hospitalier Régional et Universitaire de Tours, Tours France
| | - Philippe Glaser
- Unité de Biologie des Bactéries Pathogènes à Gram Positif, Institut Pasteur, Paris France ; CNRS UMR 3525, Paris France
| | - Laurent Mereghetti
- UMR1282 Infectiologie et Santé Publique, Bactéries et Risque Materno-Foetal, Université de Tours, Tours France ; INRA, UMR1282 Infectiologie et Santé Publique, Nouzilly France ; Service de Bactériologie-Virologie, Hôpital Bretonneau - Centre Hospitalier Régional et Universitaire de Tours, Tours France
| | - Philippe Lanotte
- UMR1282 Infectiologie et Santé Publique, Bactéries et Risque Materno-Foetal, Université de Tours, Tours France ; INRA, UMR1282 Infectiologie et Santé Publique, Nouzilly France ; Service de Bactériologie-Virologie, Hôpital Bretonneau - Centre Hospitalier Régional et Universitaire de Tours, Tours France
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15
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Da Cunha V, Davies MR, Douarre PE, Rosinski-Chupin I, Margarit I, Spinali S, Perkins T, Lechat P, Dmytruk N, Sauvage E, Ma L, Romi B, Tichit M, Lopez-Sanchez MJ, Descorps-Declere S, Souche E, Buchrieser C, Trieu-Cuot P, Moszer I, Clermont D, Maione D, Bouchier C, McMillan DJ, Parkhill J, Telford JL, Dougan G, Walker MJ, Holden MTG, Poyart C, Glaser P. Streptococcus agalactiae clones infecting humans were selected and fixed through the extensive use of tetracycline. Nat Commun 2014; 5:4544. [PMID: 25088811 PMCID: PMC4538795 DOI: 10.1038/ncomms5544] [Citation(s) in RCA: 172] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 06/27/2014] [Indexed: 11/17/2022] Open
Abstract
Streptococcus agalactiae (Group B Streptococcus, GBS) is a commensal of the digestive and genitourinary tracts of humans that emerged as the leading cause of bacterial neonatal infections in Europe and North America during the 1960s. Due to the lack of epidemiological and genomic data, the reasons for this emergence are unknown. Here we show by comparative genome analysis and phylogenetic reconstruction of 229 isolates that the rise of human GBS infections corresponds to the selection and worldwide dissemination of only a few clones. The parallel expansion of the clones is preceded by the insertion of integrative and conjugative elements conferring tetracycline resistance (TcR). Thus, we propose that the use of tetracycline from 1948 onwards led in humans to the complete replacement of a diverse GBS population by only few TcR clones particularly well adapted to their host, causing the observed emergence of GBS diseases in neonates.
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Affiliation(s)
- Violette Da Cunha
- Institut Pasteur, Unité de Biologie des Bacteries Pathogènes à Gram-positif, Paris 75015, France.,CNRS UMR3525, Paris 75015, France.,Institut Pasteur, Bioinformatics platform, Paris 75015, France
| | - Mark R Davies
- The Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 15A, UK.,Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072 Queensland, Australia
| | - Pierre-Emmanuel Douarre
- Institut Pasteur, Unité de Biologie des Bacteries Pathogènes à Gram-positif, Paris 75015, France.,CNRS UMR3525, Paris 75015, France
| | - Isabelle Rosinski-Chupin
- Institut Pasteur, Unité de Biologie des Bacteries Pathogènes à Gram-positif, Paris 75015, France.,CNRS UMR3525, Paris 75015, France
| | | | - Sebastien Spinali
- Centre National de Référence des Streptocoques, Hôpitaux Universitaires, Paris Centre Cochin-Hôtel Dieu-Broca, Paris 75014, France
| | - Tim Perkins
- Novartis Vaccines and Diagnostics, Siena 53100, Italy
| | - Pierre Lechat
- Institut Pasteur, Bioinformatics platform, Paris 75015, France
| | - Nicolas Dmytruk
- Centre National de Référence des Streptocoques, Hôpitaux Universitaires, Paris Centre Cochin-Hôtel Dieu-Broca, Paris 75014, France
| | - Elisabeth Sauvage
- Institut Pasteur, Unité de Biologie des Bacteries Pathogènes à Gram-positif, Paris 75015, France.,CNRS UMR3525, Paris 75015, France
| | - Laurence Ma
- Institut Pasteur Genomic platform, Paris 75015, France
| | | | - Magali Tichit
- Institut Pasteur Genomic platform, Paris 75015, France
| | - Maria-José Lopez-Sanchez
- Institut Pasteur, Unité de Biologie des Bacteries Pathogènes à Gram-positif, Paris 75015, France.,CNRS UMR3525, Paris 75015, France
| | | | - Erika Souche
- Institut Pasteur, Bioinformatics platform, Paris 75015, France
| | - Carmen Buchrieser
- CNRS UMR3525, Paris 75015, France.,Institut Pasteur, Biologie des Bactéries Intracellulaires, Paris 75015, France
| | - Patrick Trieu-Cuot
- Institut Pasteur, Unité de Biologie des Bacteries Pathogènes à Gram-positif, Paris 75015, France.,CNRS ERL3526, Paris 75015, France
| | - Ivan Moszer
- Institut Pasteur, Bioinformatics platform, Paris 75015, France
| | - Dominique Clermont
- Institut Pasteur, Collection de l'Institut Pasteur (CIP), Paris 75015, France
| | | | | | - David J McMillan
- QIMR Berghofer Medical Research Institute, Brisbane, 7006 Queensland, Australia.,Inflammation and Healing Research Cluster, University of the Sunshine Coast, Sippy Downs, 4556 Queensland, Australia
| | - Julian Parkhill
- The Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 15A, UK
| | | | - Gordan Dougan
- The Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 15A, UK
| | - Mark J Walker
- Australian Infectious Diseases Research Centre, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072 Queensland, Australia
| | | | | | - Claire Poyart
- Institut Pasteur, Unité de Biologie des Bacteries Pathogènes à Gram-positif, Paris 75015, France.,Centre National de Référence des Streptocoques, Hôpitaux Universitaires, Paris Centre Cochin-Hôtel Dieu-Broca, Paris 75014, France.,Institut Cochin, Université Sorbonne Paris Descartes, Paris 75014, France.,INSERM, U1016, Paris 75014, France
| | - Philippe Glaser
- Institut Pasteur, Unité de Biologie des Bacteries Pathogènes à Gram-positif, Paris 75015, France.,CNRS UMR3525, Paris 75015, France.,Institut Pasteur, Bioinformatics platform, Paris 75015, France
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16
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Usein CR, Militaru M, Cristea V, Străuţ M. Genetic diversity and antimicrobial resistance in Streptococcus agalactiae strains recovered from female carriers in the Bucharest area. Mem Inst Oswaldo Cruz 2014; 109:189-96. [PMID: 24676662 PMCID: PMC4015262 DOI: 10.1590/0074-0276140431] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 01/29/2014] [Indexed: 11/23/2022] Open
Abstract
For the first time, we used multilocus sequence typing (MLST) to understand how
Romanian group B streptococcus (GBS) strains fit into the global GBS population
structure. Colonising isolates recovered from adult human females were tested for
antibiotic resistance, were molecularly serotyped based on the capsular
polysaccharide synthesis (cps) gene cluster and further
characterised using a set of molecular markers (surface protein genes, pilus-encoded
islands and mobile genetic elements inserted in the scpB-lmb
intergenic region). Pulsed-field gel electrophoresis was used to complement the MLST
clonal distribution pattern of selected strains. Among the 55 strains assigned to six
cps types (Ia, Ib, II-V), 18 sequence types (STs) were identified
by MLST. Five STs represented new entries to the MLST database. The prevalent STs
were ST-1, ST-17, ST-19 and ST-28. Twenty molecular marker profiles were identified.
The most common profiles (rib+GBSi1+PI-1,
rib+GBSi1+PI-1, PI-2b and alp2/3+PI-1, PI-2a) were
associated with the cps III/ST-17 and cps V/ST-1
strains. A cluster of fluoroquinolone-resistant strains was detected among the
cps V/ST-19 members; these strains shared alp1
and IS1548 and carried PI-1, PI-2a or both. Our results
support the usefulness of implementing an integrated genotyping system at the
reference laboratory level to obtain the reliable data required to make comparisons
between countries.
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Affiliation(s)
- Codruţa-Romaniţa Usein
- Molecular Epidemiology Laboratory, Cantacuzino National Institute of Research/Development for Microbiology and Immunology, Bucharest, Romania
| | - Mădălina Militaru
- Molecular Epidemiology Laboratory, Cantacuzino National Institute of Research/Development for Microbiology and Immunology, Bucharest, Romania
| | | | - Monica Străuţ
- Molecular Epidemiology Laboratory, Cantacuzino National Institute of Research/Development for Microbiology and Immunology, Bucharest, Romania
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Dramsi S, Morello E, Poyart C, Trieu-Cuot P. Epidemiologically and clinically relevant Group B Streptococcus isolates do not bind collagen but display enhanced binding to human fibrinogen. Microbes Infect 2012; 14:1044-8. [DOI: 10.1016/j.micinf.2012.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 07/02/2012] [Accepted: 07/02/2012] [Indexed: 11/26/2022]
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18
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Lopez-Sanchez MJ, Sauvage E, Da Cunha V, Clermont D, Ratsima Hariniaina E, Gonzalez-Zorn B, Poyart C, Rosinski-Chupin I, Glaser P. The highly dynamic CRISPR1 system of Streptococcus agalactiae controls the diversity of its mobilome. Mol Microbiol 2012; 85:1057-71. [PMID: 22834929 DOI: 10.1111/j.1365-2958.2012.08172.x] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR) confer immunity against mobile genetic elements (MGEs) in prokaryotes. Streptococcus agalactiae, a leading cause of neonatal infections contains in its genome two CRISPR/Cas systems. We show that type 1-C CRISPR2 is present in few strains but type 2-A CRISPR1 is ubiquitous. Comparative sequence analysis of the CRISPR1 spacer content of 351 S. agalactiae strains revealed that it is extremely diverse due to the acquisition of new spacers, spacer duplications and spacer deletions that witness the dynamics of this system. The spacer content profile mirrors the S. agalactiae population structure. Transfer of a conjugative transposon targeted by CRISPR1 selected for spacer rearrangements, suggesting that deletions and duplications pre-exist in the population. The comparison of protospacers located within MGE or the core genome and protospacer-associated motif-shuffling demonstrated that the GG motif is sufficient to discriminate self and non-self and for spacer selection and integration. Strikingly more than 40% of the 949 different CRISPR1 spacers identified target MGEs found in S. agalactiae genomes. We thus propose that the S. agalactiae type II-A CRISPR1/Cas system modulates the cohabitation of the species with its mobilome, as such contributing to the diversity of MGEs in the population.
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19
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Lartigue MF, Poulard AF, Al Safadi R, Pailhories H, Domelier-Valentin AS, van der Mee-Marquet N, Rosenau A, Quentin R. Variability of neuD transcription levels and capsular sialic acid expression among serotype III group B Streptococcus strains. Microbiology (Reading) 2011; 157:3282-3291. [DOI: 10.1099/mic.0.050013-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Serotype III group B Streptococcus (GBS) is the major cause of neonatal meningitis, but the risk of infection in the colonized neonates is variable. Capsular sialic acid (Sia), whose synthesis is encoded by neu genes, appears to be a major virulence factor in several bacterial species able to reach the cerebrospinal fluid. Therefore, variations of Sia expression related to the genetic diversity of strains may have an impact on the risk of meningitis in colonized neonates. We characterized by MLST the phylogenetic diversity of 64 serotype III GBS strains isolated from vaginal flora and randomly selected. These strains mostly belonged to three major sequence types (STs): ST1 (11 %), ST17 (39 %) and ST19 (31 %). The genetic diversity of strains of these lineages, characterized by PFGE, allowed the selection of 17 representative strains, three ST1, six ST17 and eight ST19, with NEM316 as reference, in order to evaluate (i) by quantitative RT-PCR, the level of transcription of the neuD gene as a marker for the transcription of neu genes and (ii) by enzymological analysis, the expression of Sia. The mean transcription level of neuD was higher for ST17 strains than for ST1 and ST19 strains in the early, mid- and late exponential growth phases, and was maximum in the early exponential growth phase for ST17 strains and in the mid-exponential growth phase for ST1 and ST19 strains. Mean Sia concentration was higher for ST17 than for ST1 and ST9 strains in all three growth phases. For the total population, Sia concentration varied notably in the stationary phase, from 0.38 to 9.30 nmol per 108 viable bacteria, with a median value of 2.99 nmol per 108 bacteria. All ST17 strains, only one-third of the ST19 strains and none of the ST1 strains had Sia concentrations higher than the median Sia concentration. Therefore, differences in the level of expression of Sia by strains of the major serotype III GBS phylogenetic lineages might be one of the factors that explain the leading role of ST17 strains in neonatal meningitis.
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Affiliation(s)
- Marie-Frédérique Lartigue
- Service de Bactériologie et Hygiène Hospitalière, Hôpital Trousseau, CHRU de Tours, 37044 Tours, France
- Université François-Rabelais de Tours, UFR de Médecine, EA 3854 ‘Bactéries et Risque Materno-foetal’, Institut Fédératif de Recherche 136 ‘Agents Transmissibles et Infectiologie’, 37032 Tours Cedex, France
| | - Agnès Fribourg Poulard
- Service de Bactériologie et Hygiène Hospitalière, Hôpital Trousseau, CHRU de Tours, 37044 Tours, France
- Université François-Rabelais de Tours, UFR de Médecine, EA 3854 ‘Bactéries et Risque Materno-foetal’, Institut Fédératif de Recherche 136 ‘Agents Transmissibles et Infectiologie’, 37032 Tours Cedex, France
| | - Rim Al Safadi
- Université François-Rabelais de Tours, UFR de Médecine, EA 3854 ‘Bactéries et Risque Materno-foetal’, Institut Fédératif de Recherche 136 ‘Agents Transmissibles et Infectiologie’, 37032 Tours Cedex, France
| | - Hélène Pailhories
- Université François-Rabelais de Tours, UFR de Médecine, EA 3854 ‘Bactéries et Risque Materno-foetal’, Institut Fédératif de Recherche 136 ‘Agents Transmissibles et Infectiologie’, 37032 Tours Cedex, France
| | - Anne-Sophie Domelier-Valentin
- Service de Bactériologie et Hygiène Hospitalière, Hôpital Trousseau, CHRU de Tours, 37044 Tours, France
- Université François-Rabelais de Tours, UFR de Médecine, EA 3854 ‘Bactéries et Risque Materno-foetal’, Institut Fédératif de Recherche 136 ‘Agents Transmissibles et Infectiologie’, 37032 Tours Cedex, France
| | - Nathalie van der Mee-Marquet
- Service de Bactériologie et Hygiène Hospitalière, Hôpital Trousseau, CHRU de Tours, 37044 Tours, France
- Université François-Rabelais de Tours, UFR de Médecine, EA 3854 ‘Bactéries et Risque Materno-foetal’, Institut Fédératif de Recherche 136 ‘Agents Transmissibles et Infectiologie’, 37032 Tours Cedex, France
| | - Agnès Rosenau
- Service de Bactériologie et Hygiène Hospitalière, Hôpital Trousseau, CHRU de Tours, 37044 Tours, France
- Université François-Rabelais de Tours, UFR de Médecine, EA 3854 ‘Bactéries et Risque Materno-foetal’, Institut Fédératif de Recherche 136 ‘Agents Transmissibles et Infectiologie’, 37032 Tours Cedex, France
| | - Roland Quentin
- Service de Bactériologie et Hygiène Hospitalière, Hôpital Trousseau, CHRU de Tours, 37044 Tours, France
- Université François-Rabelais de Tours, UFR de Médecine, EA 3854 ‘Bactéries et Risque Materno-foetal’, Institut Fédératif de Recherche 136 ‘Agents Transmissibles et Infectiologie’, 37032 Tours Cedex, France
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20
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Characterization of invasive and colonizing isolates of Streptococcus agalactiae in East African adults. J Clin Microbiol 2011; 49:3652-5. [PMID: 21865428 DOI: 10.1128/jcm.01288-11] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Ninety-five colonizing isolates and 74 invasive isolates of Streptococcus agalactiae from Kenyan adults were characterized by using capsular serotyping and multilocus sequence typing. Twenty-two sequence types clustering into five clonal complexes were found. Data support the view that S. agalactiae isolates belonging to a limited number of clonal complexes are invasive in adults worldwide.
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21
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Florindo C, Gomes JP, Rato MG, Bernardino L, Spellerberg B, Santos-Sanches I, Borrego MJ. Molecular epidemiology of group B streptococcal meningitis in children beyond the neonatal period from Angola. J Med Microbiol 2011; 60:1276-1280. [PMID: 21474607 DOI: 10.1099/jmm.0.031674-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Streptococcus agalactiae is a major pathogen of neonates and immunocompromised adults. Prior studies have demonstrated that, beyond the neonatal period, S. agalactiae rarely causes invasive infections in children. However, during 2004-2005, S. agalactiae was the causative agent of 60 meningitis episodes in children aged 3 months to 12 years from Angola. To identify and study the specific causative genetic lineages of S. agalactiae childhood meningitis, which lack characterization to date, we conducted an extensive molecular analysis of the recovered isolates (n = 21). This constitutes what we believe to be the first molecular study of the population structure of invasive S. agalactiae isolates from Africa. A low genetic diversity was observed among the isolates, where the majority belonged to clonal complex (CC) 17 presenting the capsular subtype III-2 (86 % of cases) and marked by the intron group II GBSi1, which has previously been observed to be associated with neonatal hosts. The predominance of single-locus variants of sequence type (ST) 17 suggested the local diversification of this hypervirulent clone, which displayed novel alleles of the fbsB and sip virulence genes. The absence of the scpB-lmb region in two S. agalactiae isolates with the Ia/ST23 genotype is more typical of cattle than human isolates. Globally, these data provide novel information about the enhanced invasiveness of the CC17 genetic lineage in older children and suggest the local diversification of this clone, which may be related to the future emergence of a novel epidemic clone in Angola.
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Affiliation(s)
- Carlos Florindo
- Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia, Centro de Recursos Microbiológicos, Caparica, Portugal.,National Institute of Health, Department of Infectious Diseases, Lisbon, Portugal
| | - João P Gomes
- National Institute of Health, Department of Infectious Diseases, Lisbon, Portugal
| | - Márcia G Rato
- Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia, Centro de Recursos Microbiológicos, Caparica, Portugal
| | | | - Barbara Spellerberg
- University of Ulm, Institute of Medical Microbiology and Hygiene, Ulm, Germany
| | - Ilda Santos-Sanches
- Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia, Centro de Recursos Microbiológicos, Caparica, Portugal
| | - Maria J Borrego
- National Institute of Health, Department of Infectious Diseases, Lisbon, Portugal
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