Cited by 28Vibrio bacteria research studiesSalmonella and Campylobacter epidemiologyBacterial Infections and Vaccines

A molecular and epidemiological study of Vibrio cholerae isolates from cholera outbreaks in southern Ghana

Open access
Danso, Emelia Konadu, Asare, Prince, Otchere, Isaac Darko, Akyeh, Lorenzo Moses, Asante-Poku, Adwoa, Aboagye, Samuel Yaw, Osei-Wusu, Stephen, Opare, David +4 more·2020·PLOS ONE

Abstract

Cholera remains a major global public health threat and continuous emergence of new Vibrio cholerae strains is of major concern. We conducted a molecular epidemiological study to detect virulence markers and antimicrobial resistance patterns of V. cholerae isolates obtained from the 2012-2015 cholera outbreaks in Ghana. Archived clinical isolates obtained from the 2012, 2014 and 2015 cholera outbreaks in Ghana were revived by culture and subjected to microscopy, biochemical identification, serotyping, antibiotic susceptibility testing, molecular detection of distinct virulence factors and Multi-Locus Variable-Number of Tandem-Repeat Analysis (MLVA). Of 277 isolates analysed, 168 (60.6%) were confirmed to be V. cholerae and 109 (39.4%) isolates constituted other bacteria (Escherichia coli, Aeromonas sobria, Pseudomonas aeruginosa, Enterobacter cloacae and Enterococci faecalis). Serotyping the V. cholerae isolates identified 151 (89.9%) as Ogawa, 3 (1.8%) as Inaba and 14 (8.3%) as non-O1/O139 serogroup. The O1 serogroup isolates (154/168, 91.7%) carried the cholera toxin ctxB gene as detected by PCR. Additional virulence genes detected include zot, tcpA, ace, rtxC, toxR, rtxA, tcpP, hlyA and tagA. The most common and rare virulence factors detected among the isolates were rtxC (165 isolates) and tcpP (50 isolates) respectively. All isolates from 2014 and 2015 were multidrug resistant against the selected antibiotics. MLVA differentiated the isolates into 2 large unique clones A and B, with each predominating in a particular year. Spatial analysis showed clustering of most isolates at Ablekuma sub-district. Identification of several virulence genes among the two different genotypes of V. cholerae isolates and resistance to first- and second-line antibiotics, calls for scaleup of preventive strategies to reduce transmission, and strengthening of public health laboratories for rapid antimicrobial susceptibility testing to guide accurate treatment. Our findings support the current WHO licensed cholera vaccines which include both O1 Inaba and Ogawa serotypes.

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  • In the past decade, Vibrio cholerae isolates have become resistant to penicillins, aminoglycosides and sulfonamides, quinolones, tetracycline, macrolides, and phenicols.

    “In the past decade, V. cholerae isolates have become resistant to penicillins, aminoglycosides and sulfonamides, quinolones, tetracycline, macrolides, and phenicols”

    From Antimicrobial Resistance Rates and Surveillance in Sub-Saharan Africa: Where Are We Now? (2022) · cites this paper as [57]

    The Results (§3.2; page unavailable) report increasing resistance among V. cholerae isolates from southern Ghana’s 2012, 2014 and 2015 outbreaks. The Discussion (§4; page unavailable) identifies resistance to a sulfonamide combination, a quinolone, erythromycin, doxycycline and chloramphenicol. The paper does not establish the claimed resistance to aminoglycosides or a general trend across the past decade; testing a drug, as described in Methods (§2.2), does not itself show resistance to it. (LLM, conf=0.84)

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Research works printed but not linked: 3

  1. Ghana weekly epidemiological bulletin [Internet]. 2015 [cited 2018/11/2]. http://www.ghanahealthservice.org/downloads/Weekly_Epid_Bulletin_Week_1_2015.pdf.
  2. Y Luo, 2013, Molecular analysis of non-O1/non-O139 Vibrio cholerae isolated from hospitalised patients in China, BMC Microbiol, 13, 52, 10.1186/1471-2180-13-52 · DOI
  3. Acolatse CRY. Occurrence Of Cholera In Some Parts Of The Ablekuma Sub-Metro District Of Accra, Ghana, And Its Socio-Economic Impact On The People Of The Community. University of Ghana Thesis Collection. 2007.

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Authors
Danso, E. K., Asare, P., Otchere, I. D., Akyeh, L. M., Asante-Poku, A., Aboagye, S. Y., Osei-Wusu, S., Opare, D., Ntoumi, F., Zumla, A., Duodu, S., & Yeboah-Manu, D.
Affiliations
  • University of Ghana (GH)
  • Fondation Congolaise Pour La Recherche Médicale (CG)
  • UCL Biomedical Research Centre (GB)
Venue
PLOS ONE
Published
2020-07-10
Volume
15
Issue
7
Pages
e0236016
ISSN
1932-6203 (ISSN-L)
OpenAlex
W3042118802
Cited by
28
References
44
Citations by year
2026: 6 · 2025: 2 · 2024: 7 · 2023: 6 · 2022: 3 · 2021: 4
FWCI
2.00
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • UCL Discovery (University College London) (submittedVersion)
Funders
PANDORA-ID-NET funded EDCTP (RIA2016E-1609)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Vibrio bacteria research studies
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Salmonella and Campylobacter epidemiology
  • Life Sciences › Immunology and Microbiology › Microbiology › Bacterial Infections and Vaccines
Keywords
Vibrio cholerae, cholera outbreak, virulence genes, antimicrobial resistance, MLVA genotyping, serotyping, ctxB, TCPP, multidrug resistance, spatial clustering, outbreak clone, cholera vaccine, southern Ghana
MeSH terms
Anti-Bacterial Agents, Cholera, Cholera Toxin, Disease Outbreaks, Ghana, Humans, Microbial Sensitivity Tests, Phylogeny, Vibrio cholerae, Virulence, Tandem Repeat Sequences, Drug Resistance, Multiple, Bacterial, Serogroup

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