GUIDELINES FOR THE TREATMENT OF MALARIA IN SOUTH AFRICA 2016

The Department of Health and the South African Malaria Elemination Committee (SAMEC)

South Africa has played a leading role in the control of malaria for almost a century and has dramatically reduced its burden of malaria since 2000. This has paved the way for our commitment to eliminate malaria READ MORE ...

 

Tuesday, 07 June 2016 00:00

Dengue/haemorrhagic fever

Dengue is the most common mosquito-borne viral disease of humans that in recent years has become a major international public health concern. Globally, 2.5 billion people live in areas where dengue viruses can be transmitted. The geographical spread of both the mosquito vectors and the viruses has led to the global resurgence of epidemic dengue fever and emergence of dengue hemorrhagic fever (dengue/DHF) in the past 25 years with the development of hyperendemicity in many urban centers of the tropics.

Transmitted by the main vector, the Aedes aegypti mosquito, there are four distinct, but closely related, viruses that cause dengue. Recovery from infection by one provides lifelong immunity against that serotype but confers only partial and transient protection against subsequent infection by the other three. There is good evidence that sequential infection increases the risk of more serious disease resulting in DHF.

DHF was first recognized in the 1950s during the dengue epidemics in the Philippines and Thailand. By 1970 nine countries had experienced epidemic DHF and now, the number has increased more than fourfold and continues to rise. Today emerging DHF cases are causing increased dengue epidemics in the Americas, and in Asia, where all four dengue viruses are endemic, DHF has become a leading cause of hospitalization and death among children in several countries.

 

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