Infectious diseases

Yellow fever

Yellow fever is an acute infectious disease, which is caused by arboviruses. The disease is transmitted by mosquitoes, is characterized by hemorrhagic syndrome, defeat the cardiovascular system, liver and kidneys. Yellow fever is common in tropical countries in Latin America and Africa. Depending on the type of carrier virologists isolated town (mosquitoes Aedes aegypty) and a rural or jungle (mosquitoes kind Haemagogus) forms. In the most severe cases, it can lead to death of the patient.

Symptoms

  • Headaches, back pain, limbs, nausea and vomiting.
  • Raising the temperature to 39-40°C.
  • Gastro-intestinal bleeding.
  • Chill.
  • Enlarged liver.
  • Jaundice.
  • Collapse.

Causes

Yellow fever is caused by arboviruses, which are resistant to antibiotics and can tolerate cold. Mosquitoes are carriers of the disease.

Treatment

Yellow fever is a contagious disease, so the authorities should be made aware of each case of the disease to prevent its spread. Still there are no effective drugs against yellow fever, so symptomatic treatment is applied. Doctors prescribe a diet with the necessary quantity of liquid and vitamins, in the vein droplets injected saline, sometimes do hemodialysis.

You can not help yourself. If you are going to a country with a tropical climate, you should be vaccinated against yellow fever.

If, after returning from the tropics you have symptoms of the disease, you should seek immediate medical attention.

Physician diagnosis and take appropriate action depending on the stage of the disease and its severity.

Course of the disease

The disease begins 5-7 days after the mosquito bite. Temperature rises to 39-40°C, the patient is restless, he has chill, headache and back muscles.

Soon, the face becomes red. Swollen lips, tongue become bright red. The patient’s condition is characterized by nausea and vomiting, gastrointestinal bleeding, insomnia, delirium m.

After 3 days in many patients, the temperature drops and the somewhat better condition. Nearly 15% of patients, temperature rises again at fourth day, symptoms of poisoning of the body: the liver increases, the spleen, kidneys and heart are affected. This is the second stage of the disease. Person acquires a pale yellow color, which is a symptom of the beginning of jaundice.

The gums become swollen and bleed. Bloody vomiting or bleeding from the intestine appears in the patient.

Despite the high temperature, the patient slow heart rate, blood pressure drops, possible collapse. About 80% of patients in the second stage (6-8 days) die from cardiovascular, renal or hepatic impairment. If a person survives, he starts to get better, unfortunately, not without residual effects, which usually manifest liver disease. After an illness the patient is acquired immunity.

In recent years, the prospects are good for treating a disease. Various antiviral drugs are synthesized and tested.

Is it a dangerous disease?

Yellow fever is a dangerous tropical disease, which can lead to death. Prevention: vaccination of people traveling to tropical countries, destruction of mosquitoes. With these activities, the disease can usually be controlled. The last major epidemic of yellow fever broke out in 1960-1962. We assume that it claimed the lives of 15-30 thousand people.

Before you travel to countries with tropical climates (eg, Africa and South America), you should be vaccinated, followed by 10 days, immunity develops and persists up to 10 years.