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  • Title: Characterization of the clonal subpopulation Fiocruz L1-130 of Leptospira interrogans in rats and dogs from Brazil.
    Author: Jaeger LH, Pestana CP, Carvalho-Costa FA, Medeiros MA, Lilenbaum W.
    Journal: J Med Microbiol; 2018 Sep; 67(9):1361-1367. PubMed ID: 30059000.
    Abstract:
    PURPOSE: Leptospira interrogans serogroup Icterohaemorrhagiae strains have been described as causing disease in both humans and animals and as being present worldwide. Icterohaemorrhagiae and Copenhageni serovars are known to cause severe disease in their hosts, and zoonotic outbreaks have been described. The genetic similarity among the strains of these serovars is known. However, it has not yet been demonstrated whether major clonal subpopulation in humans, strain Fiocruz L1-130-like, can circulate among other hosts. METHODOLOGY: We performed genetic characterization of Brazilian serogroup Icterohaemorrhagiae strains of dog and rat origin by secY sequencing, variable-number tandem-repeat, multilocus sequence type and multi-spacer typing analysis. RESULTS: The strains were found to be identical among themselves and to strain Fiocruz L1-130. We suggest that the major strain of L. interrogans serogroup Icterohaemorrhagiae, Fiocruz L1-130, is widely distributed in Brazil in different hosts with substantial zoonotic potential. CONCLUSION: Understanding the circulation of strain Fiocruz L1-130 is important for the implementation of appropriate control measures. Its circulation highlights the need to treat leptospirosis caused by L. interrogans serogroup Icterohaemorrhagiae as a zoonosis that acts in the human-animal-environment interface, as per the One Health approach.
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