Dengue infection is caused by the dengue virus that belongs to the family Flaviviridae.
There are 4 serotypes (DENV-1, DENV-2, DENV-3, DENV-4). Each serotype provides specific lifetime protective immunity against reinfection of the same serotype, but only temporary (within 2-3 months of the primary infection) and partial protection against other serotypes.
It is transmitted to humans through the bites of infected Aedes mosquitoes. It is primarily transmitted by female Aedes aegypti, a tropical and subtropical species. Humans are the main host of the virus.
After 4-10 days of incubation period, illness begins immediately.
Baseline body mass index (BMI) and, to a lesser extent, school socioeconomic status are associated with subsequent weight status in schoolchildren, according to a study. Lifestyle behaviours show a lower effect as compared with prior BMI, but children with a healthier lifestyle have a reduced risk of overweight and obesity at follow-up.
Use of electronic vapour products (EVP), or vaping, has been associated with an increased likelihood of engaging in sexual and substance-use risk behaviours among US teenagers, according to data from the 2017 National Youth Risk Behaviour Survey presented at the Paediatric Academic Societies (PAS) 2019 Meeting.
Parenteral antibiotic therapy duration for bacteraemic urinary tract infection (UTI) in young infants may be safely shortened, according to a recent study showing that recurrence and readmission or emergency department revisitation rates are comparable between a ≤7-day and a longer therapy course.