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E-book Mosquitoes management : Between environmental and health issues
According to the World Health Organization (http://www.who.int/mediacentre/factsheets (updated, October 2017)), mosquitoes are responsible for roughly 750,000 deaths worldwide each year (60% from malaria). Four hundred years BC, Hippocrates described the symptoms of malaria, and the anti-malarial properties of quinine have been known to the Western world since the late 16th century when it was brought back from Latin America by Jesuits who quickly began to commercialize the medicine.But it was not until 1870 that Cuban researcher Carlos Finlay first hypothesized that the yellow fever virus was transmitted by mosquitoes – a hypothesis that was confirmed a decade later. Then came the research of Scotsman Patrick Manson, of Ronald Ross, a Britain born in India (winner of the Nobel Prize in 1902), and of Frenchman Alphonse Laveran (Nobel Prize in 1907) describing how mosquitoes vector different diseases. On the heels of this medical research, a vaccine against yellow fever was developed in the 1930s. While not perfect, vaccination has allowed yellow fever epidemics to be controlled. There is however still no vaccination against malaria, chikungunya or Zika virus, and the dengue vaccination is in its infancy. Moreover, the synthetic antimalarial drugs that have replaced quinine since the 1940s now face parasite resistance.The limited success of prophylaxis in the past and still today means that vector control (VC) remains the main prevention strategy, at times alongside more or less effective curative treatments.In countries in the South, vector-borne diseases are still a heavy burden on the population and vector control is a cornerstone of prevention strategies. And yet, the implementation of control measures is often confronted with the silent nature of most of these diseases. A large majority of people infected by mosquitoes that vector pathogens (viruses, parasites, bacteria, rickettsia, helminths) may not have any symptoms at all. In the least developed countries of the South, many sick people never consult a physician. And since the first symptoms of all these diseases are flu-like, differential diagnosis is difficult without complex bioanalysis. In countries in the North, on the other hand, health issues related to mosquitoes disappeared in the mid-20th century alongside overall improvements in living conditions and public health, and mosquito management has since shifted towards ensuring the comfort of populations and tourism-related concerns. Much emphasis has been placed on the widespread development of insecticides, with funding from both public authorities and private actors.
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