Diseases

Malaria: The causes

Malaria is a disease of infectious cause, parasitic more precisely. The parasite involved in malaria is Plasmodium. There are several different genera: Plasmodium Falciparum, Plasmodium vivax, Plasmodium ovale, Plasmodium malariae. It is transmitted to humans by the bite of a female (anopheles) mosquito that carries the parasite into its salivary glands.

As soon as the Plasmodium is passed into the blood of an individual, it is lodged in the cells of the liver to multiply. Then the liver cells burst and release thousands of parasites in the blood.

Then the plasmodium invades the red blood cells and multiplies again. This is when the red blood cell bursts and releases thousands of parasites that will invade other red blood cells. The destruction of these red blood cells causes malaria attacks (outbreaks of the disease).

When a female mosquito bites an infected subject, by pumping blood, it infects itself in turn and can transmit the parasite to another human individual. These mosquitoes are most prevalent at night, from bedtime to sunrise.

Incubation, ie the time between infection with the mosquito and the appearance of the first symptoms, varies with the parasite. It is 7 days to 2 months for Plasmodium Falciparum, and 10 days to 3 years for Plasmodium Vivax and Ovale. The disease may even appear 10 years later for Plasmodium Malariae.

The transmission of malaria can also be made directly from one individual to another: from the mother to her fetus through transplacental transmission, among drug addicts who exchange their syringes, during a blood transfusion, etc. .

Popular Posts

Category Diseases, Next Article

Andropause: the causes - Diseases
Diseases

Andropause: the causes

As menopause in women around the age of 50, when the cessation of hormonal activity of the ovaries leads to a cessation of menstruation and definitive sterility (accompanied in some women sleep problems, hot flashes, mood disorders ...) men see their testosterone levels decrease at the time of andropause
Read More
Type 1 diabetes: the causes - Diseases
Diseases

Type 1 diabetes: the causes

What are the causes of type 1 diabetes? The natural history that leads to type 1 diabetes seems to occur in several stages: the beta cells of the pancreas that make insulin are destroyed by the body's defense system (the immune system). The secretory functions of insulin then gradually and discreetly alter, the destruction process usually evolving over several years
Read More
Dislocation of the shoulder: Sources and notes - Diseases
Diseases

Dislocation of the shoulder: Sources and notes

Steven Cutts, Mark Prempeh, Steven Drew, Anterior Shoulder Dislocation, R Coll Surg Engl. 2009 January; 91 (1): 2-7. - Byron Chalidis, Nick Sachinis, Christos Dimitriou, Pericles Papadopoulos, Efthimios Samoladas, John Pournaras, Has the management of shoulder dislocation changed over time? Int Orthop
Read More
Tasteless Diabetes: Sources and Notes - Diseases
Diseases

Tasteless Diabetes: Sources and Notes

Author: Nathalie Mathieu. Expert consultant: Pr Philippe Chanson, Head of the Endocrinology Department, Bicêtre Hospital, Kremlin-Bicêtre. Sources: - Diabetes insipidus, NIH publication, No. 08-4620, last updated March 2012. - Bichet DG: Diabetes insipidus, pp 995-1013. In: Song P. and Young J., (Eds).
Read More