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Year : 2020  |  Volume : 38  |  Issue : 3  |  Page : 288-292

Utility of a multiplex real-time polymerase chain reaction for combined detection and serotyping of dengue virus in paediatric patients hospitalised with severe dengue: A report from Chennai

1 Department of Pediatrics, Kanchi Kamakoti CHILDS Trust Hospital, Chennai, Tamil Nadu, India
2 Department of Pediatrics, The CHILDS Trust Medical Research Foundation, Chennai, Tamil Nadu, India

Correspondence Address:
Dr. Anand Manoharan
The CHILDS Trust Medical Research Foundation, Kanchi Kamakoti CHILDS Trust Hospital, 12-A, Nageswara Road, Nungambakkam, Chennai - 600 034, Tamil Nadu
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijmm.IJMM_20_249

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Objective: Molecular detection and serotyping are rapid, sensitive and accurate techniques for early diagnosis of paediatric dengue. The present study evaluates multiplex real-time polymerase chain reaction (PCR) for diagnosis of dengue virus in children hospitalised with severe dengue (SD) and attempts to establish an association of clinical severity with specific serotypes. Methods: Four hundred and eighty-five samples were received from hospitalised paediatric patients with suspected dengue from March 2019 to February 2020. Multiplex real time PCR was employed for diagnosis. An in-house real-time PCR that combined diagnosis and serotyping was established. Non-structural protein 1 (NS1) assay and real-time PCR were assessed for their accuracy in diagnosing severe paediatric dengue. Results: Three hundred and twenty-five (67%) patients were positive for dengue RNA by real-time PCR. All four serotypes were identified throughout the year; dengue serotype 2 (DEN-2) was predominant (61%) followed by DEN-3, 20%. Compared to the commonly used NS1 testing, multiplex real-time PCR showed greater sensitivity in diagnosing SD. Conclusions: Compared to NS1, multiplex real-time PCR is a rapid and accurate diagnostic test for children hospitalised with SD. DEN-2 was the predominant serotype in severe cases. Continued surveillance of serotypes should be carried out year-round in endemic areas.


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2004 - Indian Journal of Medical Microbiology
Published by Wolters Kluwer - Medknow

Online since April 2001, new site since 1st August '04