RESUMO
BACKGROUND: Neisseria meningitidis serogroup B remains a prominent cause of invasive meningococcal disease (IMD) in Brazil. Because two novel protein-based vaccines against serogroup B are available, the main purpose of this study was to provide data on the diversity and distribution of meningococcal vaccine antigen types circulating in Brazil. METHODOLOGY: Genetic lineages, vaccine antigen types, and allele types of antimicrobial-associated resistance genes based on whole-genome sequencing of a collection of 145 Neisseria meningitidis serogroup B invasive strains recovered in Brazil from 2016 to 2018 were collected. RESULTS: A total of 11 clonal complexes (ccs) were identified among the 145 isolates, four of which were predominant, namely, cc461, cc35, cc32, and cc213, accounting for 72.0% of isolates. The most prevalent fHbp peptides were 24 (subfamily A/variant 2), 47 (subfamily A/variant 3), 1 (subfamily B/variant 1) and 45 (subfamily A/variant 3), which were predominantly associated with cc35, cc461, cc32, and cc213, respectively. The NadA peptide was detected in only 26.2% of the isolates. The most frequent NadA peptide 1 was found almost exclusively in cc32. We found seven NHBA peptides that accounted for 74.5% of isolates, and the newly described peptide 1390 was the most prevalent peptide exclusively associated with cc461. Mutated penA alleles were detected in 56.5% of the isolates, whereas no rpoB and gyrA mutant alleles were found. CONCLUSION: During the study period, changes in the clonal structure of circulating strains were observed, without a predominance of a single hyperinvasive lineage, indicating that an epidemiologic shift has occurred that led to a diversity of vaccine antigen types in recent years in Brazil.
Assuntos
Variação Genética/genética , Infecções Meningocócicas/genética , Vacinas Meningocócicas/genética , Neisseria meningitidis Sorogrupo B/genética , Adolescente , Adulto , Idoso , Brasil/epidemiologia , Criança , Pré-Escolar , Feminino , Genoma Bacteriano/genética , Genômica , Humanos , Imunogenicidade da Vacina/genética , Imunogenicidade da Vacina/imunologia , Lactente , Masculino , Infecções Meningocócicas/epidemiologia , Infecções Meningocócicas/imunologia , Vacinas Meningocócicas/imunologia , Vacinas Meningocócicas/uso terapêutico , Pessoa de Meia-Idade , Tipagem de Sequências Multilocus/métodos , Neisseria meningitidis Sorogrupo B/patogenicidade , Sorogrupo , Sequenciamento Completo do Genoma , Adulto JovemRESUMO
La meningitis meningocóccica es una infección poco frecuente en el período neonatal internacionalmente, y solo hay una publicación previa en la literatura médica cubana hace 25 años atrás, de recién nacidos con meningitis bacteriana causada por Neisseria meningitidis. Se presenta el caso de un recién nacido febril, con manifestaciones de toxicidad, fontanela abombada, y cuando se realizó punción lumbar, se encontró pleocitosis del líquido cefalorraquídeo y se aisló N. meningitidis serogrupo B, por lo que se diagnostica meningitis meningocóccica neonatal. Tuvo evolución favorable. Se describen algunas características de la infección meningocócica, y se destaca el diagnóstico y tratamiento recomendado para este tipo de infección, así como se hace referencia a reportes de casos publicados en la literatura internacional.
Meningoccocal meningitis is a rare infection in the neonatal period worldwide and there is just one publication in the Cuban medical literature dated 25 years ago, which presented some neonates with bacterial meningitis caused by Neisseria meningitides. This is a febrile neonate with toxicity manifestations and bulging fontanelle; he was performed a lumbar puncture to find spinal fluid pleocytosis and the serogroup B N. meningitides was then isolated, so he was diagnosed with neonatal meningococcal meningitis with favorable progression. Some characteristics of the meningococcal infection, the diagnosis and recommended treatment were described in addition to making reference to case reports published in the international literature.