Molecular epidemiology of Mycobacterium tuberculosis strains from prison populations in Santa Catarina, Southern Brazil

Taiane Freitas Medeiros (1) , Christiane Lourenço Nogueira (1) , Rodrigo Ivan Prim (1) , Mara Cristina Scheffer (1) , Eduardo Venâncio Alves (1) , Darcita Büerger Rovaris (2) , Thierry Zozio (3) , Nalin Rastogi (3) , Maria Luiza Bazzo (1)

1 UFSC - Universidade Federal de Santa Catarina = Federal University of Santa Catarina [Florianópolis]
2 LACEN/SC - Laboratório Central Do Estado de Santa Catarina
3 Unité de la Tuberculose et des Mycobactéries - WHO Supranational TB Reference Laboratory

The Tuberculosis (TB) notification rates are 5 to 81 times higher in prisons worldwide when compared to the general population. The state of Santa Catarina (SC) has few epidemiological data regarding TB in prisons. The aim of this study was to evaluate the molecular epidemiology of circulating strains in prisons of SC. The study comprised 95 clinical samples from six prisons. Among the cases included, all subjects were male, predominantly caucasians, and young adults, with low education level. The positive smear in the TB diagnosis comprised 62.0% of cases. About 50% of subjects had some condition associated with TB. The Spoligotyping results showed that the most frequent lineages were LAM (50.7%), T (22.2%) and S (11.6%). The 12-loci MIRU generated 62 different genotypes. The MSTs showed evolutionary relationships between Mycobacterium tuberculosis spoligotypes from SC and evolutionary relationships between the prison isolates and studied parameters. This first study on TB in prison units of SC highlighted the predominance of SIT216/LAM5, and SIT34/S. Interestingly, his profile was found to be different from that observed in a previous study performed with the state's general population. This data shows the need for continued surveillance of episodes of TB occurring among prison inmates in an emerging country like Brazil.

Mots clés: 12-MIRU; Molecular epidemiology; Prison; Santa Catarina; Spoligotyping; Tuberculosis

Domaines: Bactériologie

Taiane Freitas Medeiros, Christiane Lourenço Nogueira, Rodrigo Ivan Prim, Mara Cristina Scheffer, Eduardo Venâncio Alves, et al.. Molecular epidemiology of Mycobacterium tuberculosis strains from prison populations in Santa Catarina, Southern Brazil. Infection, Genetics and Evolution, 2018, 58, pp.34-39. ⟨10.1016/j.meegid.2017.12.010⟩. ⟨pasteur-01986655⟩