What is Chancroid? Diagnosis and Treatment

Written by Medicover Team and Medically Reviewed by Dr Sateesh Pydi , General Medicine

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Chancroid is a sexually transmitted bacterial infection caused by Haemophilus ducreyi that leads to painful sores or ulcers on the genital area. The infection spreads through direct sexual contact with an infected person and is more common in regions with limited access to healthcare. Symptoms may include painful genital ulcers, swollen lymph nodes in the groin, and tenderness that can interfere with daily activities.

Diagnosis is based on clinical examination, medical history, and laboratory tests to rule out other sexually transmitted infections. Early treatment with appropriate antibiotics can effectively cure the infection, relieve symptoms, prevent complications, and reduce the risk of transmission to others.

What are the Causes and Transmission of Chancroid?

Chancroid Causes

The primary cause of chancroid is the bacterium Haemophilus ducreyi. This Gram-negative bacterium is highly infectious and primarily affects the genital area. The infection is typically localized, causing ulcerative lesions that are both painful and infectious.

Chancroid Transmission

Chancroid is transmitted through direct sexual contact with an infected individual. The bacterium enters the body through micro-abrasions in the skin or mucous membranes during sexual activity. It is crucial to note that chancroid can be transmitted from both symptomatic and asymptomatic carriers, making it challenging to control its spread.

What are the Symptoms of Chancroid?

Initial Symptoms

The incubation period for chancroid ranges from one to fourteen days after exposure. The initial symptom is typically a small, red bump on the genitalia, which soon evolves into a painful ulcer. This ulcer is often soft and has ragged edges.

Progressive Symptoms

If left untreated, the ulcers can increase in size and number. In men, these ulcers are usually found on the foreskin, shaft, or head of the penis. In women, they may appear on the labia, vaginal area, or perineum. The ulcers are accompanied by painful swelling of the lymph nodes in the groin, a condition known as inguinal lymphadenopathy. In some cases, these swollen lymph nodes can rupture, forming abscesses.

When should you see a Doctor for Chancroid?

You should seek medical attention if you develop symptoms suggestive of chancroid, as early diagnosis and treatment can help relieve symptoms, prevent complications, and reduce the risk of spreading the infection to others. Timely evaluation by General Medicine specialists can help confirm the diagnosis, rule out other sexually transmitted infections, and recommend appropriate antibiotic treatment.

Painful Genital Ulcers: One or more painful sores or ulcers on the genitals that do not heal should be evaluated promptly.
Swollen Groin Lymph Nodes: Painful or enlarged lymph nodes in the groin, especially if they become swollen or drain pus, require medical attention.
Pain During Urination or Sexual Activity: Discomfort while urinating or during sexual intercourse may indicate an underlying sexually transmitted infection.
Persistent Genital Pain or Discharge: Ongoing pain, tenderness, or abnormal discharge from the genital area should not be ignored.
Recent Unprotected Sexual Contact: Individuals who have had unprotected sex or contact with a partner diagnosed with a sexually transmitted infection should undergo evaluation.
Ulcers That Worsen or Spread: Increasing size, number, or severity of genital ulcers despite home care requires prompt medical assessment.
Fever or Signs of Infection: Fever, chills, or worsening redness and swelling around the ulcers may indicate complications that require immediate treatment.
Recurrent or Unexplained Genital Sores: Anyone with recurring genital ulcers or uncertain symptoms should consult General Medicine specialists for proper diagnosis and treatment.

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How is Chancroid Diagnosed?

Clinical Examination

Diagnosis of chancroid typically begins with a clinical examination. The appearance of the ulcers and the patient's sexual history are critical factors in the initial assessment.

Laboratory Tests

To confirm the diagnosis, laboratory tests are essential. These may include:

Culture Tests: A sample from the ulcer is cultured to identify Haemophilus ducreyi.
PCR (Polymerase Chain Reaction): This test amplifies the DNA of the bacterium, providing a definitive diagnosis.
Gram Stain: This can be used to identify the Gram-negative bacteria, although it is less specific than culture or PCR.

Differential Diagnosis

Chancroid must be differentiated from other ulcerative STIs such as herpes simplex virus (HSV) and syphilis. This often requires additional tests, including serological tests for syphilis and viral cultures for HSV.

What are the Treatment Options for Chancroid?

Antibiotic Therapy

The primary treatment for chancroid is antibiotic therapy. Effective antibiotics include:

Azithromycin: A single oral dose of 1 gram.
Ceftriaxone: A single intramuscular dose of 250 mg.
Erythromycin: 500 mg orally four times a day for seven days.
Ciprofloxacin: 500 mg orally twice a day for three days.

Pain Management

Analgesics and topical anesthetics can manage pain associated with chancroid ulcers. Keeping the ulcer clean and dry can also help alleviate discomfort.

Treatment of Complications

In cases where inguinal lymphadenopathy leads to abscess formation, aspiration, incision, and drainage may be necessary. These procedures should be performed under sterile conditions to prevent secondary infections.

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How does Chancroid Affect Women?

Symptom Presentation

Chancroid can present differently in women compared to men. Ulcers may be less noticeable and can be mistaken for other types of sores or lesions. This can delay diagnosis and treatment, increasing the risk of complications.

Complications in Women

Women with chancroid are at higher risk for secondary infections and complications such as:

Phagedenic Ulcers: Deep, necrotic ulcers that can cause significant tissue damage.
Fistula Formation: Abnormal connections between the genital tract and other organs.
Increased HIV Transmission Risk: The presence of genital ulcers increases susceptibility to HIV infection.

How can Chancroid be Prevented?

Safe Sexual Practices

The most effective way to prevent chancroid is through safe sexual practices. This includes:

Consistent Condom Use: While not 100% effective, condoms significantly reduce the risk of transmission.
Limiting Sexual Partners: Reducing the number of sexual partners decreases the likelihood of encountering an infected individual.
Regular STI Screening: Routine screenings help in early detection and treatment, reducing the spread of STIs.

Public Health Measures

Public health initiatives aimed at education and awareness can also play a crucial role in preventing chancroid. These measures include:

Sexual Health Education: Informing individuals about the risks and symptoms of STIs.
Access to Medical Services: Ensuring access to diagnostic and treatment services for STIs.

What are the Complications of Chancroid?

Short-Term Complications

If left untreated, chancroid can lead to several short-term complications, including:

Severe Pain and Discomfort: Ulcers can become increasingly painful, affecting daily activities.
Secondary Infections: Open ulcers are susceptible to secondary bacterial infections.

Long-Term Complications

Chronic or untreated chancroid can result in long-term complications such as:

Scarring and Disfigurement: Persistent ulcers can lead to significant scarring.
Genital Lymphedema: Chronic lymph node inflammation can cause long-term swelling in the genital area.