Fluoroquinolones Resistance and Plasmid Profile Patterns of Typhoidal Salmonella Serovars Isolated from Human Faecal Samples in Tertiary Hospitals in South-East, Nigeria

Ezinwanne N. Ezeibe1*, Ebele B. Onuigbo1, Chinenye N. Ugwu1, Dinebari P. Berebon1, Thaddeus H.  Gugu1, Chinekwu S. Nwagwu2, Anthony A. Attama2*
1Department of Pharmaceutical Microbiology and Biotechnology University of Nigeria, Nsukka, Enugu State, Nigeria
2Department of Pharmaceutics University of Nigeria, Nsukka, Enugu State, Nigeria

Corresponding Author: [email protected]; [email protected]; Tel: +2348036207844
Recieved Date: 28 November 2021; Accepted Date: 31 January 2022; Published Date: 03 January
Citation: Ezeibe EN, Onuigbo EB, Ugwu CN, Berebon DP, Gugu TH, Nwagwu CS, Attama AA. Fluoroquinolones Resistance and Plasmid Profile Patterns of Typhoidal Salmonella Serovars Isolated from Human Faecal Samples in Tertiary Hospitals in South-East, Nigeria. Trop J Nat Prod Res, 2022; 6(1):138-143 http://www.doi.org/10.26538/tjnpr/v6i1.22
© 2022 Ezeibe et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Antimicrobial resistance associated with salmonellosis is a major global public health challenge. This study investigated the resistance and plasmid profile patterns of typhoidal Salmonella serovars isolated from human faecal samples to commonly used fluoroquinolones. A total of 300 faecal samples were collected from three tertiary hospitals in South-East Nigeria. The isolates were characterized using standard phenotypic, molecular and antibiogram studies. Antibiogram studies were evaluated using ciprofloxacin and ofloxacin discs. Data were analysed with descriptive statistics, t-test and 2-way analysis of variance. Out of 300 faecal samples, (129) 43% yielded Salmonella spp and (62) 48% were confirmed to be typhoidal Salmonella serovars. The antibiogram study on the 62 typhoidal Salmonella serovars showed that (22) 35 % and (4) 7 % were sensitive, (27) 44 % and (28) 45 % were intermediate, (13) 21 % and (30) 48 % were resistant to ciprofloxacin and ofloxacin respectively. The plasmid profile revealed the presence of DNA with molecular weight ranging from 10 to 37 kb. The isolates had higher molecular weight than the control that was used for the plasmid profiling. On exposure to a curing agent (acridine orange), all the resistant isolates became sensitive. This study showed that the incidence of resistant typhoidal Salmonella to most commonly used fluoroquinolones is high in South-East Nigeria and this could be as a result of plasmid resistant DNA. It also indicated that the indiscriminate use of ciprofloxacin and ofloxacin within the South-East region of Nigeria may increase the typhoidal Salmonella resistance.

Keywords: Human faecal samples; typhoidal salmonella; antimicrobial resistance; plasmid profile pattern; fluoroquinolones; tertiary hospitals.
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ISSN: 2616-0684 (Print)
ISSN: 2616-0692 (Online)
DOI: 10.26538/tjnpr
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