Abstract
Canine leptospirosis is often caused by Leptospira interrogans serovar Canicola. Infected dogs may become asymptomatic carriers of the pathogen, which leads to many public health concerns. In this work, we present the complete genome sequencing and in silico analysis from a virulent Brazilian strain of L. interrogans serovar Canicola, previously isolated from a stray dog in Sao Paulo City. Comparative genomic analysis with a reference genome allowed identification of 1031 INDELs and several arrangement variations. Out of 35,361 SNPs identified, 6780 were missense mutations and 16,114 were synonymous mutations. The Gene Ontology terms more affected by mutations were described. Interestingly, phylogenetic analyses indicated a genetic relatedness of the isolate with serovar Linhai strain 56,609. In addition, we found several virulence-related genes and main outer membrane proteins associated with pathogenesis. This genomic information about canine isolates may help to elucidate the molecular diversity and mechanisms of Leptospira spp. pathogenicity.
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