Journal
TROPICAL MEDICINE AND INFECTIOUS DISEASE
Volume 6, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/tropicalmed6030152
Keywords
dengue; Flavivirus; serotype-1; primary infection; dengue warning signs
Categories
Funding
- Japan Agency for Medical Research and Development (AMED) [JP19fm0108003, 20wm0225010h0101]
- Mahidol University
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Dengue fever is a neglected tropical disease transmitted primarily by mosquitoes, leading to a spectrum of clinical manifestations. With increased global travel and tourism, individuals naive to dengue viruses are at risk of infection.
Dengue is an overlooked tropical disease for which billions of people are at risk. The disease, caused by a Flavivirus with four distinct serotypes, is transmitted primarily by urban Aedes mosquito species. The infection leads to a spectrum of clinical manifestations, with the majority being asymptomatic. Primary dengue fever and, to a greater extent, a subsequent infection with a different serotype is associated with increased severity. Increased global travel and recreational tourism expose individuals naive to the dengue viruses, the most common arboviral infections among travelers. We describe a cluster of possible primary acute dengue infections in a group of 12 individuals who presented to Bangkok Hospital for Tropical Diseases in 2017. Infection was confirmed by dengue NS1 antigen and multiplex real-time RT-PCR. Nine individuals required hospitalization, and four developed dengue warning signs. Leukocytes, neutrophils, and platelets declined towards defervescence and were negatively correlated with day of illness. Six clinical isolates were identified as dengue serotype-1, with 100% nucleotide identity suggesting that these patients were infected with the same virus.
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