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Year : 2012  |  Volume : 30  |  Issue : 2  |  Page : 222-226

Awareness of changing trends in epidemiology of dengue fever is essential for epidemiological surveillance


Department of Microbiology, Maulana Azad Medical College, New Delhi, India

Correspondence Address:
M Matlani
Department of Microbiology, Maulana Azad Medical College, New Delhi
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0255-0857.96699

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Dengue has become endemic in India with outbreaks occurring almost every year. The seroprevalence and serotypic data of the last 7 years in samples obtained from suspected dengue patients from a tertiary care hospital were analyzed. Out of 7846 serum samples received in the virology laboratory from suspected dengue cases during 2002 to 2008, 2366 (30.15%) were serologically confirmed. Serotyping was done using mRT-PCR. All the four serotypes were detected in 2003, while data in 2004, 2005 and 2006 revealed the the predominance of Den-3. In the year 2007 predominance of Den-2 was observed, whereas in 2008 Den-1 was the most common serotype isolated. Overall, Den-2 and Den-3 were the most predominant serotypes during 2003-2007 but Den-1 replaced these strains in the year 2008. Since the emergence of a new predominant strain can lead to the occurrence of an outbreak, presence of Den-1 in the year 2008 would pose an alarming situation before us. Well-targeted population-based epidemiological studies are urgently required to control dengue menace.






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