Uzbekistan Causes Symptoms and Treatment for Children and Adults

Yaws is an infectious skin disease that affects children and people living in hot and humid areas. It appears as sores and bumps on the skin, and sometimes causes pain in the bones and joints. Although the disease may seem mild at first, it can lead to serious problems if left untreated, such as bone or facial deformities and chronic ulcers.In this article by Dalili Medical, we will go through everything step by step about yaws: the causes that make people susceptible, the symptoms you need to know for early detection, diagnostic methods, antibiotic treatments, and the most important prevention strategies to protect yourself and your children.

❓ What is yaws?
Yaws is an infectious bacterial disease that affects the skin and bones, caused by the bacterium Treponema pallidum pertenue.
It most commonly occurs in children living in hot and humid regions.

❓ Is yaws contagious?
✔️ Yes, yaws is highly contagious and can be transmitted from one person to another through:

Direct contact with infected skin.
Direct contact with wounds or sores on the skin.

❓ Is yaws dangerous?
❗ It can become serious if left untreated, potentially causing complications affecting the skin and bones.
✔️ However, it can be easily treated in the early stages and usually does not cause serious problems if addressed promptly.

❓ Is there a definitive treatment for yaws?
✔️ Yes, yaws can be completely cured using antibiotics such as:

Benzathine penicillin G
Azithromycin
A single dose is often sufficient to completely eliminate the infection.

❓ Is there a vaccine for yaws?
❌ No, there is currently no vaccine to prevent yaws.
✔️ Prevention relies on personal hygiene, proper wound care, and early detection and treatment of cases.

❓ How long does it take to recover from yaws?

Mild cases: 2 weeks to 1 month
Advanced cases: Longer periods may be required depending on the severity of the infection and adherence to treatment.

❓ Can yaws recur after treatment?
✔️ Yes, recurrence can occur in two cases:

If the person is exposed to a new infection.
If treatment is not followed properly or completed as prescribed.

❓ Can adults get yaws?
✔️ Adults can be infected, but the disease is much more common in children.

❓ Does yaws cause deformities?
❗ Yes, in late-stage cases, it may cause:

Bone deformities
Changes in facial appearance
These complications usually occur only if the disease is left untreated for a long time.

❓ Is yaws transmitted through food or air?
❌ No, it is not transmitted through food or air.
✔️ Transmission occurs only through direct contact with infected skin.

Who is most at risk for yaws?

Children:
Children are the most vulnerable group, usually aged 2–15 years. This is due to close contact during play, minor skin injuries, and lack of awareness about personal hygiene.
People living in rural and remote areas:
Living in hot, humid areas increases the risk of infection, especially with crowded homes and schools, poor ventilation, and limited access to clean water.
Close contacts of infected people:
Anyone living or interacting closely with infected individuals is at higher risk, including:
Family members
Close friends of infected children
People who come into direct contact with infected wounds or sores
All these factors increase the likelihood of transmission and spread of the infection.

Causes of yaws

Bacterial infection:
The main cause of yaws is the transmission of the bacterium Treponema pallidum pertenue from an infected person to a healthy person. This usually occurs through:

Direct contact with the skin, especially if there are cuts or scratches.
Play among children in areas where infections are present.

2. Direct Contact

Yaws is not transmitted through air or food. It requires direct contact with infected skin.
This can happen easily in crowded places or communal living situations.

3. Hot and Humid Environment

The disease is more common in:

Tropical and hot regions.
Areas with high humidity and elevated temperatures.
✅ These conditions allow the bacteria to survive and spread more easily.

4. Poor Personal Hygiene

Lack of regular bathing, failure to clean wounds, and sharing personal items increase the risk of infection.

5. Poverty and Poor Living Conditions

Crowded homes
Limited healthcare access
Lack of health education
All these factors contribute to the wider spread of the disease.

Types of Yaws

Yaws is not classified into separate types, but it progresses through different stages, each with distinct symptoms, all caused by the same bacterium, Treponema pallidum pertenue.

1. Primary Yaws

This is the initial stage after infection.

Appearance:

A single sore or bump on the skin, sometimes moist.
Often resembles a "raspberry-like" lesion.

Location:

Usually on the legs, arms, or face.

✅ This stage is highly contagious.

2. Secondary Yaws

If the disease is not treated during the primary stage, it spreads across the body.

Symptoms:

Skin rash in various areas.
Multiple bumps on the skin.
Pain in bones and joints.
Thickened skin, especially on the feet.

✅ This stage is also contagious.

3. Latent Yaws

This is the “dormant” stage.

Appearance:

No visible symptoms; the person may seem healthy.

⚠️ Notes:

The bacteria remain in the body.
The disease may reappear later if treatment is not followed.

4. Tertiary Yaws

This is the most severe stage, appearing years after initial infection.

⚠️ Symptoms:

Bone deformities
Erosion of the nose or face
Chronic ulcers

❌ Usually not contagious, but extremely dangerous.

Symptoms of Yaws

Yaws symptoms develop gradually and differ according to the stage of the disease.

Primary Stage

After infection with Treponema pallidum pertenue:

Skin sore or bump:

Small red or brown lesion.
Sometimes resembles a “raspberry-like” growth.
Usually appears on legs, hands, or face.
May enlarge and ooze fluid over time.

Secondary Stage

If untreated, the disease spreads:

Skin rash: Spots or bumps across the body; may be painful or slightly itchy.
Bone and joint pain: Common in children; can affect walking.
Thickened skin: Especially on the feet; skin becomes rough and hard.

Late Stage (Neglected Cases)

Appears years later if left untreated:

⚠️ Deformities: Bone or facial deformities
⚠️ Chronic ulcers: Open wounds that are slow to heal

Signs to watch for:

Unhealing sores
Spreading bumps
Child complaining of unexplained leg pain

✅ In these cases, see a doctor immediately.

Diagnosis of Yaws

Diagnosis requires careful steps to distinguish it from other skin diseases.

Clinical Examination

Inspect the sores or bumps for their appearance, location, and spread.
Ask about contact with infected individuals and environmental conditions (humidity, crowding, children).
The characteristic shape of the lesion provides a strong indicator of infection.

Laboratory Tests

Antibody tests: Detect the bacteria in the body, e.g.,
- VDRL
- RPR
  (Similar tests used for syphilis due to related bacteria)
Confirmatory tests (optional):
- TPHA
- Sample analysis from the lesions in some cases

Differential Diagnosis

Distinguish yaws from:

Syphilis
Other bacterial skin diseases
Common skin infections

⚠️ Early diagnosis is critical to prevent disease progression, deformities, and transmission.

Risks of Yaws

Due to Treponema pallidum pertenue, the disease can lead to:

Bone deformities: Gradual erosion, leg curvature, difficulty walking (especially in children)
Facial and nasal deformities: Tissue destruction, facial changes, psychological effects
Chronic ulcers: Open wounds, slow healing, risk of secondary infections
Mobility impairment: Joint pain, walking difficulties, possible disability in severe cases
Infection spread: Infected children can transmit it to others during play
Psychosocial impact: Embarrassment, social isolation, reduced self-confidence

Treatment of Yaws with Medications

Treatment mainly relies on antibiotics to kill the bacteria and prevent spread.

First-line Treatment

Benzathine Penicillin G (injection)

Usually, a single dose is enough.
Highly effective with rapid results.
Most commonly used, especially in mild cases.

Alternative for penicillin allergy:
Azithromycin (oral tablets)

Taken by mouth, usually single dose or as prescribed.
Easy for children to use.

Other alternatives if necessary:

Doxycycline
Tetracycline

Treatment Duration

Early stages: Usually a single dose is sufficient.
Advanced stages: May require follow-up or additional doses.

⚠️ Important:

All close contacts (family, nearby children) should be examined and sometimes treated even if asymptomatic, to prevent reinfection.

Complete Recovery

✔️ Early stages: The disease can be cured completely.
❗ Late stages: Antibiotics stop bacterial activity, but deformities may remain.

⚠️ Warning:

Do not take antibiotics without a medical diagnosis.
Completing the prescribed doses is critical for full recovery.

Recovery Timeline

Early cases: Improvement within 3–7 days; sores and bumps disappear in 2–4 weeks; full recovery usually within a month.
Moderate cases: Skin symptoms improve over weeks; bone pain may take longer; recovery within 1–2 months.
Late cases: Bacteria eliminated after treatment; deformities may persist; additional treatment or surgery may be needed.

When does treatment start working?

Usually within 24–48 hours of taking antibiotics.
Infection decreases rapidly after treatment.

⚠️ Factors affecting recovery speed:

Stage of the disease at treatment start
Patient’s immune system strength
Adherence to prescribed doses
Hygiene and wound care

✅ Important advice:

Follow up with the doctor after treatment to confirm complete recovery.
Sometimes a repeat test is needed to ensure the infection is fully cleared.

Prevention of Yaws

Preventing yaws is simple if a few key steps are followed, as the disease spreads mainly through direct contact with infected skin.

Personal hygiene:

Regular bathing
Washing hands thoroughly with soap and water
Cleaning skin after play or contact with others
✅ Proper hygiene significantly reduces transmission risk.