Monkeypox (Mpox): Causes, Symptoms, Transmission, Treatment & Prevention

Introduction

Monkeypox, now officially referred to as Mpox, is a viral zoonotic disease that has gained global attention in recent years. It belongs to the same family of viruses as smallpox but is generally less severe. The disease is caused by the monkeypox virus, a member of the Orthopoxvirus genus.

Global awareness of Mpox increased significantly after outbreaks reported in multiple countries beyond Africa, prompting responses from organizations like the World Health Organization.

This article provides a complete overview of Mpox, including its causes, symptoms, transmission, diagnosis, treatment, and prevention.

What is Monkeypox (Mpox)?

Mpox is a viral infectious disease that primarily spreads from animals to humans but can also transmit between people. It was first identified in 1958 in laboratory monkeys, and the first human case was recorded in 1970.

Key Characteristics:

• Caused by the monkeypox virus

• Related to smallpox (but milder)

• Can cause rash, fever, and swollen lymph nodes

• Zoonotic in nature (animal to human transmission)

Types (Clades) of Monkeypox Virus

There are two genetic clades of the virus:

1. Clade I (Central African/Congo Basin)

   • More severe

   • Higher mortality rate

2. Clade II (West African)

   • Less severe

   • Responsible for most global outbreaks

Causes of Monkeypox

Monkeypox is caused by the monkeypox virus, which spreads through both animal and human contact.

Animal Sources:

• Rodents (primary reservoir)

• Monkeys

• Other wild animals

Risk Factors:

• Close contact with infected individuals or animals

• Handling contaminated materials

• Traveling to outbreak regions

Transmission of Monkeypox

Mpox spreads through several modes of transmission:

1. Human-to-Human Transmission

• Direct contact with skin lesions, rash, or body fluids

• Respiratory droplets during prolonged face-to-face contact

• Intimate or close physical contact

2. Animal-to-Human Transmission

• Bites or scratches from infected animals

• Handling bushmeat

• Contact with animal blood or fluids

3. Indirect Transmission

• Contaminated clothing, bedding, or surfaces

Symptoms of Monkeypox

The incubation period ranges from 5 to 21 days.

Early Symptoms:

• Fever

• Headache

• Muscle aches

• Back pain

• Fatigue

• Swollen lymph nodes (a key distinguishing feature)

Rash Development:

The rash typically appears 1–3 days after fever.

Rash Stages:

1. Macules (flat spots)

2. Papules (raised bumps)

3. Vesicles (fluid-filled)

4. Pustules (pus-filled)

5. Scabs (which fall off eventually)

Key Features:

• Rash often begins on the face and spreads

• Can affect palms, soles, and genital areas

• Lesions may be painful

Stages of Infection

1. Incubation Period – No symptoms, not contagious

2. Prodromal Stage – Fever and lymph node swelling

3. Rash Stage – Visible lesions and high infectivity

4. Recovery Stage – Scabs fall off and healing begins

Diagnosis of Monkeypox

Diagnosis is based on:

Clinical Evaluation:

• Characteristic rash

• Swollen lymph nodes

Laboratory Tests:

• PCR (Polymerase Chain Reaction)

• Viral DNA detection

Differential Diagnosis:

Mpox can resemble:

• Smallpox

• Chickenpox

• Measles

• Herpes infections

Treatment of Monkeypox

There is no specific cure, but most cases are self-limiting and resolve within 2–4 weeks.

Supportive Care:

• Hydration

• Pain management

• Fever control

Antiviral Medications:

• Tecovirimat (TPOXX)

• Cidofovir

These are used in severe or high-risk cases.

Prevention of Monkeypox

1. Vaccination

Vaccines originally developed for smallpox can protect against Mpox.

• JYNNEOS vaccine

• ACAM2000 vaccine

2. Personal Protection:

• Avoid close contact with infected individuals

• Practice good hygiene

• Use protective equipment in healthcare settings

3. Isolation:

• Infected individuals should isolate until lesions heal completely

Complications of Monkeypox

Although usually mild, Mpox can cause complications such as:

• Secondary infections

• Pneumonia

• Eye infections (which may lead to vision loss)

• Sepsis (rare)

High-risk groups include:

• Children

• Pregnant women

• Immunocompromised individuals

Monkeypox vs Smallpox

Feature	Monkeypox	Smallpox
Severity	Mild to moderate	Severe
Mortality	Low	High
Lymph nodes	Swollen	Not swollen
Rash similarity	Similar	More uniform
Vaccine	Smallpox vaccine effective	Specific vaccine

Global Situation and Outbreaks

Mpox was historically confined to Africa but spread globally in recent outbreaks. The World Health Organization declared it a public health concern during multi-country outbreaks.

Efforts include:

• Surveillance

• Vaccination campaigns

• Public awareness

Is Monkeypox Dangerous?

Most people recover without complications. However, severe illness can occur in vulnerable populations. Early detection and supportive care significantly improve outcomes.

Frequently Asked Questions (FAQs)

1. Is monkeypox contagious?

Yes, it spreads through close contact and respiratory droplets.

2. How long does monkeypox last?

Typically 2 to 4 weeks.

3. Can monkeypox be fatal?

Rarely, but possible in severe cases.

4. Is there a cure?

No specific cure, but treatment helps manage symptoms.

Conclusion

Monkeypox (Mpox) is an emerging infectious disease that requires awareness, early diagnosis, and preventive measures. While less severe than smallpox, it still poses a public health concern, especially during outbreaks.

Organizations like the World Health Organization continue to monitor and manage its spread globally. With proper hygiene, vaccination, and awareness, the risk of infection can be significantly reduced.