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Fig. 1 | BMC Microbiology

Fig. 1

From: Microbial survey of ready-to-eat salad ingredients sold at retail reveals the occurrence and the persistence of Listeria monocytogenes Sequence Types 2 and 87 in pre-packed smoked salmon

Fig. 1

Phylogenetic tree using the Neighbour-Joining (NJ) method based on concatenated nucleotide sequences of seven MLST house-keeping genes of 16 Sequence Types (ST) of 64 L. monocytogenes isolates recovered from salad and smoked salmon samples collected between September 2011 and October 2012 (phases I & II). Bootstrap values of >70% are shown on the branches and are calculated from 1,000 replicates. The horizontal scale bar of 0.005 represents nucleotide substitution rate per site. *Novel sequence types determined in this study (http://bigsdb.pasteur.fr/listeria/) a Isolates were recovered from smoked salmon samples unless specified. Isolates were recovered from ba chilled cooked prawn sample, ca chilled cooked shrimp sample and dpre-packed chicken salad samples. dA total of 31 isolates were recovered from 24 samples of Brand A’s pre-packed smoked salmon. Six samples were found positive with two different L. monocytogenes STs. These include the co-detection of ST2 and ST1218 in two samples; the co-detection of ST2 and ST1220, ST2 and ST1221, ST1220 and ST1222, as well as ST87 and ST1223 in one sample respectively

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BMC Microbiology

ISSN: 1471-2180

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