COMPARISON OF METHODS TO IDENTIFY Neisseria meningitidis IN ASYMPTOMATIC CARRIERS
SUMMARY Neisseria meningitidis is a cause of several life-threatening diseases and can be a normal commensal in the upper respiratory tract of healthy carriers. The carrier rate is not well established especially because there is no standard method for the isolation of N. meningitidis. Therefore, th...
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ftdoajarticles:oai:doaj.org/article:a664fb331eb1456295818b26006b2e65 2024-09-09T19:26:13+00:00 COMPARISON OF METHODS TO IDENTIFY Neisseria meningitidis IN ASYMPTOMATIC CARRIERS Camila F. RIZEK André Machado LUIZ Gracilene Ramos de ASSIS Silvia Figueiredo COSTA Anna Sara LEVIN Marta Heloisa LOPES https://doi.org/10.1590/S1678-9946201658060 https://doaj.org/article/a664fb331eb1456295818b26006b2e65 EN eng Universidade de São Paulo (USP) http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652016005000244&lng=en&tlng=en https://doaj.org/toc/1678-9946 1678-9946 doi:10.1590/S1678-9946201658060 https://doaj.org/article/a664fb331eb1456295818b26006b2e65 Revista do Instituto de Medicina Tropical de São Paulo, Vol 58, Iss 0 Carrier state Neisseria meningitidis PCR Asymptomatic carriage Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article ftdoajarticles https://doi.org/10.1590/S1678-9946201658060 2024-08-05T17:49:30Z SUMMARY Neisseria meningitidis is a cause of several life-threatening diseases and can be a normal commensal in the upper respiratory tract of healthy carriers. The carrier rate is not well established especially because there is no standard method for the isolation of N. meningitidis. Therefore, the aim of this study was to compare identification methods for the carrier state. Two swabs were collected from 190 volunteers: one was cultured and the other had DNA extracted directly from the sample. The Polymerase Chain Reaction (PCR) was performed to determine species and serogroups and compared the results between the methods. PCR for species determination used two pairs of primers and when there was only one amplicon, it was sequenced. The culture technique was positive in 23 (12.1%) subjects while the direct extraction method was positive in 132 (69.5%), p < 0.001. Among the 135 subjects with positive N. meningitides tests, 88 (65.2%) were serogroup C; 3 (2.2%) serogroup B; 5 (3.7%) were positive for both serogroup B and C, and 39 (28.9%) did not belong to any of the tested serogroups. In this study, PCR from DNA extracted directly from swabs identified more N. meningitidis asymptomatic carriers than the culture technique. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Revista do Instituto de Medicina Tropical de São Paulo 58 0 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Carrier state Neisseria meningitidis PCR Asymptomatic carriage Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Carrier state Neisseria meningitidis PCR Asymptomatic carriage Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Camila F. RIZEK André Machado LUIZ Gracilene Ramos de ASSIS Silvia Figueiredo COSTA Anna Sara LEVIN Marta Heloisa LOPES COMPARISON OF METHODS TO IDENTIFY Neisseria meningitidis IN ASYMPTOMATIC CARRIERS |
topic_facet |
Carrier state Neisseria meningitidis PCR Asymptomatic carriage Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
SUMMARY Neisseria meningitidis is a cause of several life-threatening diseases and can be a normal commensal in the upper respiratory tract of healthy carriers. The carrier rate is not well established especially because there is no standard method for the isolation of N. meningitidis. Therefore, the aim of this study was to compare identification methods for the carrier state. Two swabs were collected from 190 volunteers: one was cultured and the other had DNA extracted directly from the sample. The Polymerase Chain Reaction (PCR) was performed to determine species and serogroups and compared the results between the methods. PCR for species determination used two pairs of primers and when there was only one amplicon, it was sequenced. The culture technique was positive in 23 (12.1%) subjects while the direct extraction method was positive in 132 (69.5%), p < 0.001. Among the 135 subjects with positive N. meningitides tests, 88 (65.2%) were serogroup C; 3 (2.2%) serogroup B; 5 (3.7%) were positive for both serogroup B and C, and 39 (28.9%) did not belong to any of the tested serogroups. In this study, PCR from DNA extracted directly from swabs identified more N. meningitidis asymptomatic carriers than the culture technique. |
format |
Article in Journal/Newspaper |
author |
Camila F. RIZEK André Machado LUIZ Gracilene Ramos de ASSIS Silvia Figueiredo COSTA Anna Sara LEVIN Marta Heloisa LOPES |
author_facet |
Camila F. RIZEK André Machado LUIZ Gracilene Ramos de ASSIS Silvia Figueiredo COSTA Anna Sara LEVIN Marta Heloisa LOPES |
author_sort |
Camila F. RIZEK |
title |
COMPARISON OF METHODS TO IDENTIFY Neisseria meningitidis IN ASYMPTOMATIC CARRIERS |
title_short |
COMPARISON OF METHODS TO IDENTIFY Neisseria meningitidis IN ASYMPTOMATIC CARRIERS |
title_full |
COMPARISON OF METHODS TO IDENTIFY Neisseria meningitidis IN ASYMPTOMATIC CARRIERS |
title_fullStr |
COMPARISON OF METHODS TO IDENTIFY Neisseria meningitidis IN ASYMPTOMATIC CARRIERS |
title_full_unstemmed |
COMPARISON OF METHODS TO IDENTIFY Neisseria meningitidis IN ASYMPTOMATIC CARRIERS |
title_sort |
comparison of methods to identify neisseria meningitidis in asymptomatic carriers |
publisher |
Universidade de São Paulo (USP) |
url |
https://doi.org/10.1590/S1678-9946201658060 https://doaj.org/article/a664fb331eb1456295818b26006b2e65 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Revista do Instituto de Medicina Tropical de São Paulo, Vol 58, Iss 0 |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652016005000244&lng=en&tlng=en https://doaj.org/toc/1678-9946 1678-9946 doi:10.1590/S1678-9946201658060 https://doaj.org/article/a664fb331eb1456295818b26006b2e65 |
op_doi |
https://doi.org/10.1590/S1678-9946201658060 |
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Revista do Instituto de Medicina Tropical de São Paulo |
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