Abstract
Pig pasteurellosis, caused by Pasteurella multocida, is an acute infection that also has economic implications for pig farmers. We report the complete genome sequence of a P. multocida, serovar B:2 'Soron' strain isolated from the blood of a pig that had died of pasteurellosis in India. The isolate was not found to be haemorrhagic septicaemia (HS) specific B:2 by the PCR assay. The genome of 'Soron' strain is a single circular chromosome of 2,272,124 base pairs in length and contains 2014 predicted coding regions, 4 ribosomal RNA operons, and 52 tRNAs. It has 1812 protein-coding genes that were also found in reference sequence PmP52Vac. Phylogenetic analysis revealed that Pm_P52VAc and P. multocida 'Soron' serovar B:2 were clustered in different clades. Pasteurella multocida 'Soron' serovar B:2 was found to cluster with the same ancestor of Pm70, which is of avian origin. The genome was found to contain regions that encode proteins which may confer resistance to various antibiotics including cephalosporin, which is used to treat pasteurellosis. The isolate was also found to harbour a phage region. This strain represents a novel multi-locus sequence type (MLST) that has not been previously identified, as all of the alleles used for MLST were found, but did not match any of the alleles in the database with 100% nucleotide identity. The most closely related ST was ST221. This is the first whole-genome sequence from P. multocida serovar B:2 of pig origin.
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