Characterization of strains of Neisseria meningitidis causing meningococcal meningitis in Mozambique, 2014: Implications for vaccination against meningococcal meningitis.

Autor: Munguambe AM; Microbiology Laboratory, National Institute of Health, Ministry of Health, Maputo, Mozambique., de Almeida AECC; Laboratory of Reference Microorganisms, National Institute of Quality Control of Health (INCQS); Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil., Nhantumbo AA; Microbiology Laboratory, National Institute of Health, Ministry of Health, Maputo, Mozambique., Come CE; Microbiology Laboratory, National Institute of Health, Ministry of Health, Maputo, Mozambique., Zimba TF; Maputo Central Hospital, Maputo, Mozambique., Paulo Langa J; Microbiology Laboratory, National Institute of Health, Ministry of Health, Maputo, Mozambique., de Filippis I; Laboratory of Reference Microorganisms, National Institute of Quality Control of Health (INCQS); Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil., Gudo ES; National Institute of Health, Ministry of Health, Maputo, Mozambique.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2018 Aug 08; Vol. 13 (8), pp. e0197390. Date of Electronic Publication: 2018 Aug 08 (Print Publication: 2018).
DOI: 10.1371/journal.pone.0197390
Abstrakt: Introduction: In sub Saharan Africa, the epidemiology, including the distribution of serogroups of strains of N. meningitidis is poorly investigated in countries outside "the meningitis belt". This study was conducted with the aim to determine the distribution of serogroups of strains of N. meningitidis causing meningococcal meningitis in children and adults in Mozambique.
Methods: A total of 106 PCR confirmed Neisseria meningitidis Cerebrospinal Fluid (CSF) samples or isolates were obtained from the biobank of acute bacterial meningitis (ABM) surveillance being implemented by the National Institute of Health, at three central hospitals in Mozambique, from January to December 2014. Serogroups of N. meningitidis were determined using conventional PCR, targeting siaD gene for Neisseria meningitidis. Outer Membrane Proteins (OMP) Genotyping was performed by amplifying porA gene in nine samples.
Results: Of the 106 PCR confirmed Neisseria meningitidis samples, the most frequent serotype was A (50.0%, 53/106), followed by W/Y (18.9%, 20/106), C (8.5%, 9/106), X (7.5%, 8/106) and B (0.9%, 1/106). We found non-groupable strains in a total of 15 (14.2%) samples. PorA genotypes from nine strains showed expected patterns with the exception of two serogroup C strains with P1.19,15,36 and P1.19-36,15 and one serogroup X with P1.19,15,36, variants frequently associated to serogroup B.
Conclusion: Our data shows that the number of cases of meningococcal meningitis routinely reported in central hospitals in Mozambique is significant and the most dominant serogroup is A. In conclusion, although serogroup A has almost been eliminated from the "meningitis belt", this serogroup remains a major concern in countries outside the belt such as Mozambique.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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