Random amplified polymorphic DNA-based molecular heterogeneity analysis of Salmonella enterica isolates from foods of animal origin.

Nirmal Kumar,Abhishek Gaurav,Hitesh Kumar,Surendra Singh Shekhawat,Bincy Joseph

doi:10.14202/vetworld.2019.146-154

Nirmal Kumar, Abhishek Gaurav + Show 3 more

Open Access

https://doi.org/10.14202/vetworld.2019.146-154

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Abstract

Aim:This study aims to study the significance of random amplified polymorphic DNA (RAPD) typing in heterogeneity analysis of Salmonella serovars, isolated from foods of animal origin.Materials and Methods:Salmonella serovars isolated and identified from different foods of animal origin such as meat, milk, and egg by standard bacteriological methods. DNA isolated from all 10 isolates which are confirmed by biochemical and serotyping methods and then RAPD was performed using the primers OPB 10, primer 1290, NSC I, NSC II, and primer 3. Then, RAPD data were analyzed using the BioNumerics software, Belgium, Germany.Results:RAPD polymerase chain reaction (PCR) using five primers, namely OPB 10, primer 1290, NSC I, NSC II, and primer 3, classified the 10 isolates into 9, 10, 10, 7, and 10 RAPD-PCR types with discriminating powers of 0.1987, 0.423, 0.50889, 0.1842, and 0.2582, respectively. The phylogram constructed with NSC I profile classified isolates based on geographical origin. Primer 1290, NSC II, and primer 3 produced some uniform bands in all isolates indicating their binding ability in conserved genomic region. This study revealed that RAPD profile can be best used for finding out the heterogeneity at molecular level of Salmonella isolates in combination with other molecular and phenotypic typing techniques. Thus, our results support earlier observation of its significance by different workers on different Salmonella serotypes.Conclusion:Repeatability of RAPD-PCR is insufficient to distinguish genetic differences among Salmonella serovars.

Highlights

Foodborne diseases are a serious a public health concern in food industry and Salmonella organisms are most frequently isolated bacterial agents of foodborne outbreaks [1]
This study revealed that random amplified polymorphic DNA (RAPD) profile can be best used for finding out the heterogeneity at molecular level of Salmonella isolates in combination with other molecular and phenotypic typing techniques
The attempts were made to evaluate the molecular heterogeneity among Salmonella isolates from foods of animal origin using RAPDPCR

Summary

Introduction

Foodborne diseases are a serious a public health concern in food industry and Salmonella organisms are most frequently isolated bacterial agents of foodborne outbreaks [1]. Gram-negative Salmonella is a major health problem worldwide that causes typhoidal and non-typhoidal salmonellosis. Typhoidal and non-typhoidal illnesses cause millions of cases yearly with significant economic losses and even human deaths [2]. Most cases of non-typhoidal Salmonella (NTS) disease are associated with consumption of contaminated foods of the animal origin, poultry meat and in some instances vegetables [3,4]. Salmonella serovars are responsible for infections occurring in developing as well as developed world and have been a major concern in terms of economic burden due to high morbidity [5]. The Creative Commons Public Domain Dedication waiver (http:// creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated

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