jueves, 10 de febrero de 2011

FORMAS DE CONTAGIO

The malaria affects more persons who are more capable to the mosquito bites or who live in zones of high risk. Some persons are more prone to this disease due to their location or attractive smell for the mosquitos that transmit the disease.
According to David Smith of the US National Institutes of Health in Bethesda (Maryland) only 20 % of the population of certain areas of the sub-Saharan Africa registers 80 % of the infections of malaria. The identification of these persons of high risk might give the keys in order that the sanitary authorities contain the spread of the disease of the most efficient way.
Some obvious factors as living in poor houses without mosquito nets or to live in swampy areas facilitate the contagion, but the smell and the chemists that the people detach with the sweat or the breath are also a very important factor, because it attracts in major or minor measure to the mosquitos that spread the disease.
This happens even in the first world, where there are persons that the mosquitos find tastier than different, but in the third world the consequences of the bite can be very serious.

The malaria infects 300 million persons in the world every year, most in Sub-Saharan áfrica, and at the moment there is no a vaccine 100 % effective.


La malaria se contagia a través de la picadura de un mosquito Anofeles infectado. 
Con ciertas especies de malaria, se pueden producir formas latentes que pueden provocar recaídas de la malaria meses o años más tarde. La malaria también puede transmitirse a través de transfusiones de sangre de personas infectadas o por utilizar agujas o jeringas contaminadas. La única forma posible de contagio directo entre humanos es que una mujer embarazada lo transmita por vía trasplacentaria al feto.
La malaria no se transmite de persona a persona. No se puede adquirir la malaria por tener contacto casual con personas infectadas. El pensamiento erróneo acerca de esto, da lugar a constante discriminación social.







Reference: Smith D. L., Dushoff J., Snow R. W.& Hay I.. Nature, 438. 492 – 495 (2005).





video


http://www.anlis.gov.ar/inst/consulta/infecciosas/malaria/malaria.htm#es%20trasmitida

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