Abstract
During 2011–2013, a nationwide outbreak of chikungunya virus infection occurred in the Philippines. The Asian genotype was identified as the predominant genotype; sporadic cases of the East/Central/South African genotype were detected in Mindanao. Further monitoring is needed to define the transmission pattern of this virus in the Philippines.
Highlights
During 2011–2013, a nationwide outbreak of chikungunya virus infection occurred in the Philippines
The results suggested that circulating Asian genotype viruses in the Philippines were introduced from Indonesia before 2010
The 2011–2013 outbreak in the Philippines was caused mainly by the Asian genotype; the reason that this large outbreak was caused by this genotype is unknown
Summary
During 2011–2013, a nationwide outbreak of chikungunya virus infection occurred in the Philippines. Previous studies of chikungunya fever in the Philippines focused on clinical and serologic analyses [7], and recent reports on the molecular surveillance of CHIKV in the country were limited and analyzed only samples collected in 2012 [8,9]. Oshitani) conducted genetic analysis to characterize recent CHIKV infections that caused a large nationwide outbreak in the Philippines during 2011–2013.
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