Myanmar dengue outbreak associated with displacement of serotypes 2, 3, and 4 by dengue 1

In 2001, Myanmar (Burma) had its largest outbreak of dengue-15,361 reported cases of dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS), including 192 deaths. That year, 95% of dengue viruses isolated from patients were serotype 1 viruses belonging to two lineages that had diverged from an ear...

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Bibliographic Details
Published in:Emerging infectious diseases 2004-04, Vol.10 (4), p.593-597
Main Authors: Thu, Hlaing Myat, Lowry, Kym, Myint, Thein Thein, Shwe, Than Nu, Han, Aye Maung, Khin, Kyu Kyu, Thant, Kyaw Zin, Thein, Soe, Aaskov, John
Format: Article
Language:English
Subjects:
Australia - epidemiology
Dengue - epidemiology
Dengue - virology
dengue hemorrhagic fever
dengue phylogeny
Dengue virus
Dengue Virus - classification
Disease Outbreaks
Humans
Myanmar
Phylogeny
Serotyping
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Summary:In 2001, Myanmar (Burma) had its largest outbreak of dengue-15,361 reported cases of dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS), including 192 deaths. That year, 95% of dengue viruses isolated from patients were serotype 1 viruses belonging to two lineages that had diverged from an earlier, now extinct, lineage sometime before 1998. The ratio of DHF to DSS cases in 2001 was not significantly different from that in 2000, when 1,816 cases of DHF/DSS were reported and dengue 1 also was the most frequently isolated serotype. However, the 2001 ratio was significantly higher than that in 1998 (also an outbreak year) and in 1999, when all four serotypes were detected and serotypes 1, 2, and 3 were recovered in similar numbers. The large number of clinical cases in 2001 may have been due, in part, to a preponderance of infections with dengue 1 viruses.
ISSN:1080-6040
1080-6059
DOI:10.3201/eid1004.030216