Quick Menu

Upcoming Journals

Journal of Advances in Microbiology

Journal of Advances in Microbiology, 2456-7116,Vol.: 5, Issue.: 3

 

Original-research-article

 

Molecular Epidemiology of Vibrio cholerae Recovered from Sewage Drains, Captured Fish and Humans in 2015/16 Cholera Outbreak in Zanzibar, Tanzania

 

 

A. R. Rabia1*, P. N. Wambura2, G. Misinzo2, S. I. Kimera3, R. H. Mdegela3, A. Mzula2 and F. A. Khamis4

1Department of Natural Sciences, School of Social and Natural Sciences, State University of Zanzibar, P.O.Box 146, Zanzibar, Tanzania.

2Department of Microbiology, Parasitology and Biotechnology, College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, P.O.Box 3019, Morogoro, Tanzania.

3Department of Veterinary Medicine and Public Health, College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, P.O.Box 3021, Morogoro, Tanzania. 

4Mnazimmoja Hospital, Ministry of Health and Social Affairs, P.O.Box 672, Zanzibar, Tanzania.

 

Abstracts

 

Aims: Zanzibar shares global burden of cholera epidemic suffering annual outbreaks with case fatality rates (CFR) of 1.8%. This study aimed at determining the transmission chain of the outbreak through marine fish by molecular characterization of Vibrio cholerae isolates.

Study Design: Cross sectional design was used to collect samples from fish, sewage sites and stool from clinical cases.

Place and Duration of Study: The study was carried out in Zanzibar municipality between November 2015 and May 2016.

Methodology: Epidemiological data on the outbreak was provided by the Ministry of Health and Social Affairs, Zanzibar. Sixty samples from fish intestines, 23 samples from sewage drains and 38 human stools were investigated. Vibrio cholerae was identified biochemically and serology was done using Polyvalent, Inaba, Ogawa and O139 antisera. Kirby-Bauer disc diffusion was used for antibiotic sensitivity against seven antibiotics. DNA was extracted and PCR performed using ctxB forward and reverse ctxB primers. Gene sequences were interpreted by Mega 7.0 software.

Results: Thirty stool samples (79%), 9 fish samples (15%) and 6 sewage samples (26%) were positive for Vibrio cholerae. All isolates were identified: serogroup O1, biotype El Tor and serotype Ogawa. Age category 16-30 yrs old had highest number of cases (37.6%). Case fatality rate (CFR) was 1.8%, more mortalities were in males and >5yrs old. None of the isolates was resistant to ciprofloxacin. High resistance was against nalidixic acid, erythromycin, co-trimaxozole, ampicillin and tetracycline. Multidrug resistance was observed in 40% of isolates. CtxB gene sequencing revealed that the current Vibrio cholerae strain was homologous to Haiti 2013-2015 and China 2016 strains, but distinct from Zanzibar 2013 strain.

Conclusion: Fish could be the source of Vibrio cholerae transmission in Zanzibar. Presence of rapidly emerging endemic reservoir of Vibrio cholerae in Zanzibar environment was suspected favouring horizontal gene transfer with resultant novel strains. High drug resistance and multidrug resistance are matters of public health concern.

 

Keywords :

Fish; sewage drains; Vibrio cholera; ctxB gene; Zanzibar.

 

Full Article - PDF    Page 1-11    Article Metrics

 

DOI : 10.9734/JAMB/2017/36036

Review History    Comments

Search this site

Advanced Search

Announcement & News

ISI Thomson Reuters selected British Journal of Pharmaceutical Research for Emerging Sources Citation Index

We are delighted to inform that ISI Thomson Reuters selected British Journal of Pharmaceutical Resea...

SCOPUS selected Annual Research & Review in Biology (ARRB)

We are delighted to inform that famous indexing organization SCOPUS (from Elsevier) selected  A...

Index Copernicus Evaluation Result Released

We are delighted to inform that Index Copernicus (a leading indexing organization from Pol...

Journal Repository (JR): Permanent Digital Archiving of SDI journals

SDI is happy to announce that all our journals are now permanently archived in Journal Repository (J...

Index Copernicus Value of British Journal of Medicine and Medical Research

  We are delighted to inform that Index Copernicus (a leading indexing organization ...

SDI journal got 35th ranking in Publons

We are delighted to announce (as of 04/01/2016) that British Journal of Medicine and Medical Re...

Growth of SDI and world publication market

As of 2014, total 25,064 journals are competing in World market of journal publication. In 2011, tot...

Publication and site statistics (up to Sept, 2015)

  Number of submission: 22181 (Total up to Sept, 2015) Number of published paper: 10949&n...

Index Medicus selected 15 SDI journals

We are delighted to inform that Index Medicus (IMSEAR) has selected following 15 SDI journals for in...

SCIENCEDOMAIN international received 5844 submissions in 2013

SCIENCEDOMAIN international is pleased to announce that it has received 5844 submissions in 2013, ac...



SCIENCEDOMAIN Awards

  • No Awards listed.

Browser Compatibility : Mozila firefox, Google Crome and IE 7 & above. Creative Commons License Terms & Condition   |   Privacy Policy   |   Join Us   |   Help   |   Contact Us
© Copyright 2010-2017, SCIENCEDOMAIN international. All rights reserved.