Yellow Fever: Symptoms and Causes
A specific species of mosquitoes carry the virus that causes yellow fever. Common symptoms in moderate cases include fever, headache, nausea, and vomiting. However, yellow fever can worsen and lead to bleeding, as well as issues with the heart, liver, and kidneys. When yellow fever is more severe, it may cause fatality in up to 50% of cases.
There is no specific treatment for yellow fever. However, getting vaccinated prior to visiting a region where the virus is known to occur can shield you from contracting the illness.
Symptoms of Yellow Fever
There are few symptoms or indicators for the first three to six days after contracting yellow fever (the initial phase). Following this, the infection goes through an acute phase and, in rare situations, a potentially fatal and toxic phase.
Initial Stage
In this primary phase, the following symptoms may appear:
- Fever
- Headache
- Muscle aches in the back and knees
- Sensitivity to light
- Nausea
- Vomiting
- Loss of appetite
- Dizziness
- Redness of eyes, face or tongue
Later Stage
There may be a day or two after the acute phase when signs and symptoms subside, but some people with acute yellow fever then enter the toxic phase. The acute signs and symptoms of yellow Fever was recur during the toxic phase, along with increasingly severe and life-threatening ones. These may include:
- Jaundice is the yellowing of the skin and the whites of the eyes.
- Stomach pain, nausea, and even bloody vomiting
- Reduced urination
- Nose bleeding, mouth, and eye bleeding
- Sluggish heartbeat
- Failure of Kidneys and liver
- Brain malfunction, such as coma, seizures, and delirium
Yellow fever's toxic phase can be dangerous
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Get A Second OpinionWhen to see a doctor?
Visit a doctor when the fever persists for a long time and signs or symptoms of the toxic phase start developing. Also, if you are travelling to a place where yellow fever is more common, keep your doctor informed.
Causes of Yellow Fever
- The Aedes aegypti mosquito spreads the virus that causes yellow fever. These mosquitoes reproduce in even the cleanest water and thrive in and around human settlements. This virus is known to affect humans and monkeys.
- Once a mosquito bites a host carrying this disease, the yellow fever virus circulates through its bloodstream before settling in the salivary glands.
- Once bitten, the yellow fever virus enters the host's bloodstream, and symptoms may start to appear soon.
Risk Factors of Yellow Fever
- If you visit a location where mosquitoes continue to spread the yellow fever virus, you could be at risk of contracting the illness.
- Even while there have been no recent reports of infected people in most regions, this doesn't always mean that you're safe. It's possible that local populations have received yellow fever vaccinations and are immune to the illness or that yellow fever cases simply haven't been found and reported.
- If you plan to visit such a region, get vaccinated against yellow fever at least a few weeks before your trip to ensure your safety.
- The yellow fever virus can infect anyone, although older persons or persons with reduced immunity are more likely to become critically ill.
Prevention of Yellow Fever
Preventing yellow fever involves proactive measures:
- Vaccination: The most effective protection against yellow fever.
- Avoiding mosquito bites: Use repellents and wear protective clothing.
- Environmental precautions: Ensure homes are well-screened or air-conditioned, use mosquito nets, and sanitize surroundings.
Diagnosis of Yellow Fever
Yellow fever symptoms are frequently confused with those of dengue fever, typhoid fever, malaria, and other viral hemorrhagic fevers. Thus, diagnosing yellow fever based only on signs and symptoms is usually a bit challenging.
Your medical professional will most likely:
- Inquire about your past trips and medical history.
- Take a blood sample for analysis.
If you have yellow fever, the virus itself may be found in your blood. If not, blood testing can also find antigens and other elements unique to the virus.
Treatment of Yellow Fever
There is no antiviral medication for a definitive yellow fever cure. Instead, supportive care in a hospital is critical:
- Administering fluids and oxygen
- Stabilizing blood pressure
- Performing dialysis for kidney failure
- Providing plasma transfusions to aid blood clotting
- Treating secondary infections
Doctors also recommend staying indoors to avoid mosquito bites and prevent further spread.
Lifestyle Changes to Prevent Yellow Fever
Adopt the following lifestyle changes in your daily routine-
- Use mosquito repellents consistently.
- Wear long sleeves and trousers when outdoors.
- Avoid staying in bushy areas during peak mosquito activity.
- Regularly sanitize and pest control your home and garden.
Dos and Don'ts
To manage this illness, along with its associated infections and symptoms, appropriate therapy and a set of dos and don'ts must be adhered to.
|
Do’s |
Don’ts |
|
Visit a doctor immediately if your symptoms persist |
Self treat fever |
|
Use mosquito repellent |
Forget to close windows or other gaps in the evening |
|
Get vaccinated against yellow fever |
Forget to take medications |
|
Wear protective clothing |
Send your child to playing without applying repellents |
|
Wash your hands after cleaning the garden or plants |
Forget to go for routine checkups |
|
Create awareness about yellow fever |
Go in bushy or dark areas in the evening |
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Book an AppointmentCare at Medicover Hospitals
Our team of doctors and medical specialists at Medicover Hospitals is highly trusted and has extensive experience in offering compassionate healthcare services. With the use of advanced tools and technology, our diagnostic department can perform the tests necessary to diagnose yellow fever, and a treatment plan is created.
Our outstanding group of general physicians accurately diagnoses and treats this illness, leading to favorable yellow fever treatment results.
Citations
https://www.sciencedirect.com/science/article/abs/pii/S1473309901000160
Frequently Asked Questions
Why is it called yellow fever?
Yellow fever is named for one of its characteristic symptoms, jaundice, which causes the skin and eyes to turn yellow due to liver damage caused by the virus.
What is the difference between malaria and yellow fever?
Malaria and yellow fever are both mosquito-borne diseases, but they are caused by different pathogens and have distinct symptoms and treatment approaches. Malaria is caused by Plasmodium parasites, while yellow fever is caused by the yellow fever virus. Symptoms of malaria include fever, chills, and flu-like illness, while yellow fever typically presents with fever, jaundice, and muscle pain. Treatment and prevention methods also differ between the two diseases.
How is yellow fever transmitted?
Yellow fever is transmitted primarily through the bite of infected mosquitoes, particularly the Aedes aegypti species. When a mosquito bites an infected person or animal, it can acquire the virus and transmit it to other individuals during subsequent bites.
Is yellow fever contagious?
Yellow fever is not directly contagious from person to person. It is primarily transmitted through the bite of infected mosquitoes. However, in rare cases, the virus can be transmitted from person to person through blood transfusion or organ transplantation from an infected donor.
Is yellow fever airborne?
Yellow fever is not considered an airborne disease. It is primarily transmitted through the bite of infected mosquitoes, particularly the Aedes aegypti species. Transmission occurs when an infected mosquito bites a person and transfers the virus through its saliva into the bloodstream.
How often do you need to update your yellow fever vaccine?
The yellow fever vaccine provides long-lasting protection, and a single dose is generally considered to provide immunity for at least 10 years, possibly even for a lifetime. However, some countries require a booster dose every 10 years for individuals at continued risk of exposure to yellow fever.
