Vector Borne Diseases – Yellow Fever 01

Categories: Health

YFWhat is yellow fever?

Yellow fever is a viral infectious disease that is transmitted to humans through the bite of infected mosquitoes. Though many cases of yellow fever are mild and self-limiting, yellow fever can also be a life-threatening disease causing hemorrhagic fever and hepatitis (hence the term “yellow” from the jaundice it can cause).

This viral disease occurs in tropical areas of Africa and South America, and each year there are an estimated 200,000 cases of yellow fever worldwide, leading to approximately 30,000 deaths. An increase in the number of cases of yellow fever in the last few decades has led to campaigns aimed at improving public awareness and disease prevention for this re-emerging infectious disease.

How is yellow fever transmitted?

Yellow fever is caused by a virus. When the virus gets into a human body, it replicates and spreads to various parts of the body. Yellow fever is transmitted to humans by the bite of infected mosquitoes. ( Aedes and Haemagogus mosquitoes)

What are yellow fever symptoms and signs?

After infection with the yellow fever virus, many individuals will experience no apparent manifestations of the disease; while others will go on to develop a mild, self-limiting flu-like illness characterized by the following symptoms and signs:

  • fever,
  • chills,
  • generalized muscle aches,
  • back pain,
  • headache,
  • malaise,
  • weakness,
  • lack of appetite,
  • nausea,
  • vomiting.

Most improve after approximately three to four days. However, some patients may, after about 24 hours, enter a second phase of the disease This toxic phase of the disease is more severe. In addition to the above symptoms, the following symptoms and signs may also develop:

  • abdominal pain,
  • jaundice,
  • bleeding from the gums, nose, eyes, and/or stomach,
  • blood in the stool (black stool) and blood in the vomit (black vomit),
  • easy bruising of the skin,
  • kidney failure,
  • confusion,
  • seizures,
  • coma,
  • death.

We will in the next post conclude on Yellow Fever.

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