Mansonelliasis: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Mansonelliasis?
A primary care doctor is often the first doctor a patient sees for this problem. If the infection is confirmed, the doctor may send the patient to an infectious disease doctor, who treats infections caused by parasites, bacteria, and viruses.
What it is
Mansonelliasis is an infection caused by tiny worms called filarial worms. Filarial worms are parasites, meaning living things that survive inside another creature. The worms belong to a group called Mansonella. They are spread to people through the bites of small insects. Many people who carry these worms never feel sick at all.
Symptoms
Most people with Mansonelliasis have no symptoms. When symptoms do happen, they are often mild. Some people get itchy skin or small bumps on the skin. Some people develop a fever or joint pain. Because symptoms are often mild or missing, many people do not know they have the infection.
Causes and who gets it
Mansonelliasis is caused by worms that enter the body through an insect bite. The infection is found in parts of Africa, Central America, South America, and the Caribbean. People who live in or travel to these areas have a higher chance of getting infected, especially if they stay a long time.
How doctors diagnose it
Doctors diagnose Mansonelliasis by looking for the worms in a sample of the patient's blood. The worms release tiny baby worms into the bloodstream, which a lab can see under a microscope. Sometimes the doctor needs blood taken at a certain time of day, because the baby worms appear in the blood in patterns.
Treatment
Treatment depends on the type of Mansonella worm and the symptoms a person has. When treatment is needed, doctors use medicines that kill the worms or stop them from reproducing. A doctor will explain the options and watch for side effects during treatment.
When to see a doctor
Anyone who has traveled to or lived in a tropical area should watch for unexplained itching, skin bumps, swelling, or a fever. If these happen, it is a good idea to talk to a doctor, and to tell them where and when the travel happened.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance for visits. Either type can be a good starting point for this condition. They can order lab tests and manage mild cases directly, and will refer the patient to a specialist if needed.
Common questions
Is Mansonelliasis contagious from person to person?
No. The worms only spread through the bite of an infected insect. A person with the infection cannot pass it directly to another person.
Can Mansonelliasis be prevented?
The best way to lower the risk is to avoid insect bites in areas where the infection is found. Using insect repellent, wearing long sleeves and pants, and sleeping in screened or air-conditioned rooms can help.
Is Mansonelliasis dangerous?
For most people, the infection causes mild problems or none at all. Some people do develop symptoms that need treatment. So it is worth talking to a doctor if you have concerns.
How long does the infection last?
The worms can live in the human body for years, sometimes without causing symptoms. With treatment, many people see their symptoms improve. Still, results differ from person to person.
Sources
- NIH Genetic and Rare Diseases Information Center - Mansonelliasis
- Centers for Disease Control and Prevention - Mansonellosis
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
