... blood. The male, which feeds on nectar and water, has basic mouthparts. Females of this group prefer the blood of warm-blooded animals. When they bite, they inject some of their salivary fluid into the wound, causing swelling and irritation. Many inject infectious micro organisms and thus transmit such diseases as malaria, yellow fever, dengue, and filariasis. Malaria Malaria is a weakening infectious disease characterized by chills, shaking, and periodic bouts of intense fever. It is caused by single-celled parasites of the Plasmodium sort, malaria is transmitted from person to person by the bite of female mosquitoes. The disease today occurs mostly in tropical and subtropical countries, particularly sub-Saharan Africa and Southeast Asia. According to the World Health Organization, malaria is prevalent in over 100 countries. Each year, between 300 million and 500 million cases of malaria are diagnosed, and 1.5 million to 2.7 million people die of the disease. In recent years, malaria ...

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