Fifteen years of successful spread of Salmonella enterica serovar Mbandaka clone ST413 in Poland and its public health consequences
Journal Title: Annals of Agricultural and Environmental Medicine - Year 2016, Vol 23, Issue 2
Abstract
In the 1990s, [i]Salmonella enterica[/i] serovar (S.) Mbandaka occurred in feed and poultry in Poland. In the following years, the serovar also gained epidemiological importance in other EU countries. The objectives of current study were to evaluate the genetic relationship of contemporary S. Mbandaka with isolates originating from the beginning of the epidemics, and to assess the contribution of poultry as the source of infections in humans. Seventy S. Mbandaka isolated mainly in 2009 – 2010 from humans, poultry, food, and feed were typed with API ID32 [sup]®[/sup], MIC, plasmid profiling, PFGE, and MLST. PCR and sequencing were used to identify plasmid mediated quinolone and cephalosporin resistance mechanisms. Six biochemical profiles were identified and 59 of S. Mbandaka proved to be susceptible to the applied antimicrobials. Eight strains carried plasmids and a few of them were positive for [i]bla[/i][sub]CMY-2[/sub] and [i]qnr[/i]S1 genes. Two clusters of 15 [i]XbaI[/i]-PFGE profiles with similarity of 77.5% were found. The first cluster, gathered 7 profiles involving historical isolates and several contemporary non-human S. Mbandaka. The predominant profile in the second cluster consisted of 28 human and 1 broiler isolate. MLST analysis showed sequence type ST413 occurring among all tested isolates. The identification of close genetic relationships between S. Mbandaka of human and poultry origin indicates animals as a primal human infection route. Despite [i]Salmonella [/i]control programmes, the S. Mbandaka ST413 clone has been circulating for several years in Poland. [i]Salmonella[/i] control polices in food production chain should be continuously updated to target serovars of major epidemiological importance. Resistance noted in S. Mbandaka to such antimicrobials as fluoroquinolones and cephalosporins may hinder public health.
Authors and Affiliations
Andrzej Hoszowski, Magdalena Zając, Anna Lalak, Paweł Przemyk, Dariusz Wasyl
Keywords
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- EP ID EP79345
- DOI 10.5604/12321966.1203883
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