In the tropics malaria is a major killer, especially of young children in areas of intense transmission of Plasmodium fakiparum: there may be a million or more such deaths in Africa every year.' In parts of the world with no transmission of malaria (fig 1) returning travellers and visitors, infected elsewhere, continue to develop the illness. Twelve patients died of malaria in Britain in 1991; ...

Chikungunya virus (CHIKV) has been previously reported in many African and Asian areas, but it recently reemerged strongly in countries bordering the Indian Ocean as well as caused an outbreak in northern Italy. In Germany, where potential CHIKV vectors are not yet established, CHIKV infection is mandatorily notifiable. Cases reported from 2006 through 2009 were analyzed for travel characterist...

INTRODUCTION Spotted fever group rickettsioses are an interesting group of infections, which are increasing in incidence worldwide. CASE PRESENTATION Here we describe an imported case to the United Kingdom occurring in a patient who had recently visited Kruger National Park in South Africa - a highly endemic area for Rickettsia infections. Initial treatment with doxycycline failed but the pat...

To the Editor: Imported malaria has become a major public health challenge in China. Despite an 89.8% decrease in total cases from 2008 (26,873) through 2012 (2,729), the proportion of imported malaria cases has increased from 14.7% to 89.0% (1). We analyzed the malaria situation in China in 2012 by using data obtained from the national information reporting system of infectious diseases. In th...

The nonpopulation conserving SIR (SIR-NC) model to describe the spread of infections in a community is studied. Unlike standard model, this does not assume population conservation. Although similar form SIR, SIR-NC admits closed solution while allowing us mortality and also provides different, arguably more realistic, interpretation parameters. Numerical comparisons with standard, conserving, a...

Dengue is acute viral disease transmitted to humans by Aedes mosquitoes (Ae. aegypti, Ae. albopictus). Dengue virus belongs to the family Flaviviridae, genus Flavivirus. There are four dengue virus serotypes (1-4) which are maintained endemically. The disease is endemic in tropical and subtropical areas between latitudes 35 degrees N and 35 degrees S. Infections may be asymptomatic or may produ...