BMC infectious diseases · 2019
Challenges and clinical relevance of molecular detection of Bordetella pertussis in South Africa.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Moosa Fahima, du Plessis Mignon, Wolter Nicole, Carrim Maimuna, Cohen Cheryl, von Mollendorf Claire, Walaza Sibongile, Tempia Stefano, Dawood Halima, Variava Ebrahim, von Gottberg Anne
Аннотация
BACKGROUND: We assessed the utility of a multi-target, real-time PCR assay for Bordetella pertussis detection and diagnosis in patients with severe respiratory illness (SRI), influenza-like illness (ILI), and asymptomatic controls.
METHODS: Real-time PCR detection of IS481, pIS1001, hIS1001 and ptxS1 was performed on nasopharyngeal specimens (SRI, ILI and controls) and induced sputum (SRI) collected from June 2012 to May 2016 through respiratory illness surveillance. Using PCR cycle threshold (Ct) value cut-offs, IS481 positive cases were classified as confirmed (Ct < 35) or possible (Ct 35-39) pertussis disease.
RESULTS: Among 12,922 samples, 146 (1.1%) were IS481 positive of which 62% (90/146) were classified as confirmed. The attributable fraction (AF) was 92.2% (95% CI, 65.6 to 98.2%) and 90.5% (95% CI, 57.5 to 97.9%) amongst SRI and ILI PCR-confirmed pertussis cases, respectively. Amongst possible pertussis cases, AF was 36.9% (95% CI, - 142.3 to 83.6%) and 67.5% (95% CI, - 30.6 to 91.9%) in the SRI and ILI groups, respectively.
CONCLUSION: All IS481 positive specimens could be considered as B. pertussis infection, and potentially pertussis disease with supportive clinical information.
METHODS: Real-time PCR detection of IS481, pIS1001, hIS1001 and ptxS1 was performed on nasopharyngeal specimens (SRI, ILI and controls) and induced sputum (SRI) collected from June 2012 to May 2016 through respiratory illness surveillance. Using PCR cycle threshold (Ct) value cut-offs, IS481 positive cases were classified as confirmed (Ct < 35) or possible (Ct 35-39) pertussis disease.
RESULTS: Among 12,922 samples, 146 (1.1%) were IS481 positive of which 62% (90/146) were classified as confirmed. The attributable fraction (AF) was 92.2% (95% CI, 65.6 to 98.2%) and 90.5% (95% CI, 57.5 to 97.9%) amongst SRI and ILI PCR-confirmed pertussis cases, respectively. Amongst possible pertussis cases, AF was 36.9% (95% CI, - 142.3 to 83.6%) and 67.5% (95% CI, - 30.6 to 91.9%) in the SRI and ILI groups, respectively.
CONCLUSION: All IS481 positive specimens could be considered as B. pertussis infection, and potentially pertussis disease with supportive clinical information.