Epidemic Diseases

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Of the many diseases spread by insects, none are actually caused by the insects themselves but by other organisms passed on when they feed or bite. Insects are capable of spreading diseases caused by many different types of microorganisms including bacteria, viruses, protozoan and others. Mosquitoes have earned the title of "the most deadly creature on earth." This is due to the fact that they spread serious epidemic diseases such as Malaria, Yellow Fever, African Sleeping Sickness, and West Nile Virus. Malaria is one of the ten most common, yet deadly diseases in the world. It is a parasitic disease spread by the bite of Anopheles mosquito, which is active between dusk and dawn. Malaria occurs in over 100 countries and territories.…show more content…
This type of mosquito that usually carries the yellow fever is called Aedes aegypti. Among the two kinds, urban yellow fever is the cause of most yellow fever outbreaks. The symptoms of yellow fever are varied. The virus has an incubation period of three to six days. The first symptoms will be fever, muscle pain, backache, headache, shivers, and loss of appetite, nausea, and vomiting. Frequently a slow pulse accompanies the fever. Most people improve after three to four days, however in 15% of the cases; patients go into a toxic phase within 24 hours. Fever reappears, and they exhibit jaundice and abdominal pain with vomiting. Bleeding occurs from the mouth, eyes, nose and stomach. The kidneys fail to produce urine, and blood appears in the vomit and feces. Half of the patients who experience this toxic phase die in ten to fourteen days. Due to the fact that many of these symptoms are identical to malaria and other diseases native to the areas, yellow fever is difficult to recognize. Blood tests can identify the virus, but may not be easily available to people in poorer developing countries. A vaccine for yellow fever is available, and highly effective. The immunity can take effect within one week after vaccination, and protects a person for between ten years and possible for life. The World Health Organization is trying to convince countries in infected areas to incorporate the yellow fever vaccine into their
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