Article
Epidemiology and molecular characterization of Neisseria lactamica carried in 11-19 years old students in Salvador, Brazil
Registro en:
MOURA, A. R. S. S. et al. Epidemiology and molecular characterization of Neisseria lactamica carried in 11-19 years old students in Salvador, Brazil. International Journal of Medical Microbiology, 2018.
1438-4221
10.1016/j.ijmm.2018.03.007
Autor
Moura, Ana Rafaela Silva Simões
Kretz, Cécilia Batmalle
Ferreira, Ítalo Eustáquio
Nunes, Amélia Maria Pithon Borges
Filippis, Ivano de
Moraes, José Cássio de
Reis, Mitermayer Galvão dos
McBride, Alan John Alexander
Wang, Xin
Campos, Leila Carvalho
Resumen
Ministério da Saúde, Brazil (grant number TC335/2013), and Fundação de Amparo à Pesquisa do Estado
da Bahia (grant number SUS 007/2014). Neisseria lactamica is a nonpathogenic commensal bacterium that is potentially associated with the development of natural immunity against N. meningitidis. However, the genetic variation present in natural populations of N. lactamica has not been fully investigated. To better understand its epidemiology and genetic variation, we studied N. lactamica carriage in 1200 students aged 11-19 years old in Salvador, Brazil. The carriage prevalence was 4.5% (54/1200), with no statistical difference among sex and age, although we observed a trend towards higher carriage prevalence among 11-year-old individuals. Whole genome sequence analysis revealed a high genetic diversity among the isolates, with the presence of 32 different STs, 28 (87.5%) of which were new. A total of 21/50 (42%) isolates belonged to three different clonal complexes. While none of the isolates contained nadA or fHpb alleles, we detected 21 FetA variants, 20 NhbA variants and two variants of PorB. The data provide detailed information on circulating N. lactamica isolates in adolescents in Brazil and are complementary to studies in other countries.
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