10 résultats pour "malaria"
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Malaria.
last long and is unlikely to be fatal. Infants and children are especially vulnerable to malaria because they have not yet built up immunity to the parasite. Some peoplehave genetic traits that help them resist malaria. Sickle-cell anemia and thalassemia, for example, are inherited blood disorders linked to malaria resistance. Travelers who lack immunity to malaria should take precautionary measures when visiting areas where the disease is prevalent. Such measures include using insectrepellents,...
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Malaria
4 La malaria est transmise par un moustique : l'anophele. Les seules formes capables de se developper chez l'in- secte sont des formes sexuees males et femelles (game- tes) qui sont produites pendant le cycle de division. Les gametes absorbes par le moustique se combinent pour produire d'autres formes parasitaires qui se fixent dans les glandes salivaires de ('animal. Lors de la piquIre, de Ia salive est injectee a Ia victime, apportant les parasites qui ensemenceront son sang. 5 Pendant longtem...
- Malaria - Biologie.
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Paludisme - Malaria.
Quelle est la cause du paludisme ? Le paludisme est dû à tr ois types principaux de plasmodiums. Chaque type est plus ou moins dangereux pour l'homme selon les complications qu'il provoque . Introduit à l'occasion d'une piqûre d'anophèle, le parasite pénètre dans un globule rouge où il proli fère. Le gl ob ule écla te e t les plasmodiums lib érés vo nt à leur tour proliférer dans d'autres globu les. Quand le nombre de pa...
- Anophèle: Le moustique responsable de la malaria.
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Human Disease.
disease can be transmitted through food infected with mutated proteins. B Spread of Infectious Disease Some pathogens are spread from one person to another by direct contact. They leave the first person through body openings, mucous membranes, and skin wounds,and they enter the second person through similar channels. For example, the viruses that cause respiratory diseases such as influenza and the common cold are spreadin moisture droplets when an infected person coughs or sneezes. A hand that...
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Race - biology.
distributed as a cline, generally varying along a north-south line. Skin color is lightest in northern Europeans, especially in those who live around the Baltic Sea, andbecomes gradually darker as one moves toward southern Europe, the Mediterranean, the Middle East, and into northern Africa and northern subtropical Africa. Skin isdarkest in people who live in the tropical regions of Africa. The lack of clear-cut discontinuities makes any racial boundary based on skin color totally arbitrary. Sim...
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Demokratische Republik Kongo - geographie.
Volkes (20. Mai), der Tag der Unabhängigkeit (30. Juni), der Geburtstag des Präsidenten (14. Oktober), der Veteranentag (17. November) und der Jahrestag der ZweitenRepublik (24. November) gefeiert. 3.3 Soziales Das Nationale Institut für Soziale Sicherheit zahlt den fest angestellten Erwerbstätigen Pensionen und soziale Leistungen. In den neunziger Jahren brach dieGesundheitsversorgung mehr oder weniger zusammen. Die Lebenserwartung beträgt bei Männern 55,3 Jahre, bei Frauen 59,9 Jahre (2008)....
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Africa.
The highest elevations in Africa are found in the various ranges of East Africa. After Kilimanjaro, the next highest peaks are Mount Kenya (5,199 m/17,057 ft), north ofKilimanjaro in central Kenya; Margherita Peak (5,109 m/ 16,762 ft) in the Ruwenzori Range on the border between Uganda and the Democratic Republic of the Congo(DRC); Ras Dashen (4,620 m/ 15,157 ft) in the Ethiopian Highlands of northern Ethiopia; Mount Meru (4,565 m/ 14,977 ft), close to Kilimanjaro in Tanzania; and MountElgon (4,...
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Africa - Geography.
The highest elevations in Africa are found in the various ranges of East Africa. After Kilimanjaro, the next highest peaks are Mount Kenya (5,199 m/17,057 ft), north ofKilimanjaro in central Kenya; Margherita Peak (5,109 m/ 16,762 ft) in the Ruwenzori Range on the border between Uganda and the Democratic Republic of the Congo(DRC); Ras Dashen (4,620 m/ 15,157 ft) in the Ethiopian Highlands of northern Ethiopia; Mount Meru (4,565 m/ 14,977 ft), close to Kilimanjaro in Tanzania; and MountElgon (4,...