The specific genes that than enable the parasite called Wolbachia to infect insects by hijacking their reproduction have been identified by teams of biologists from Vanderbilt and Yale Universities. Wolbachia is the world most successful parasite, but most people have never heard of it. That’s because because it only infects bugs – millions upon millions […]
A single-dose dengue vaccine, tested in a small clinical trial, was 100 percent effective in protecting human volunteers from a strain of the most prevalent mosquito-borne virus in the world. The vaccine, developed at the National Institutes of Health, was tested in a trial led by researchers at the Johns Hopkins University Bloomberg School of […]
Dengue Fever (DF) and dengue hemorrhagic fever (DHF) are caused by related virus serotypes (DEN-1, DEN-2, DEN-3, and DEN-4), of the genus Flavivirus. Once contracted the individual is immune to that particular serotype for life. A person can contract more than one dengue infection during his/her lifetime.
Both diseases are considered tropical diseases and all four involve human and the Aedes mosquito. The illnesses can be a mild nonspecific viral syndrome or it can be a severe and fatal hemorrhagic disease.
Risk Factors for dengue Infection
– The history of prior dengue infection of the patient
– Age of the patient
– The particular strain of the dengue virus
A pandemic of dengue began in Southeast Asia after WWII and spread around the world since that time. Dengue viruses are not emerging in the Pacific and the Americas.