Epidemiology and molecular characterization of Neisseria lactamica carried in 11–19 years old students in Salvador, Brazil
| Autor: | Alan J. A. McBride, Ana Rafaela Silva Simões Moura, Ivano de Filippis, Cecilia B. Kretz, Ítalo Eustáquio Ferreira, Amélia Maria Pithon Borges Nunes, Xin Wang, Leila Carvalho Campos, Mitermayer G. Reis, José Cássio de Moraes |
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| Rok vydání: | 2018 |
| Předmět: |
Male
0301 basic medicine Microbiology (medical) Adolescent Genotype 030106 microbiology Porins Neisseria meningitidis medicine.disease_cause Polymorphism Single Nucleotide Microbiology Young Adult 03 medical and health sciences Genetic variation El Salvador medicine Humans Allele Students Alleles Neisseria lactamica Genetics Molecular Epidemiology Genetic diversity Whole Genome Sequencing Molecular epidemiology biology General Medicine biology.organism_classification Meningococcal Infections Infectious Diseases Carriage Carrier State Female Brazil Bacterial Outer Membrane Proteins |
| Zdroj: | International Journal of Medical Microbiology. 308:454-458 |
| ISSN: | 1438-4221 |
| DOI: | 10.1016/j.ijmm.2018.03.007 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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