Granuloma Inguinale (Klebsiella granulomatis): Symptoms, Treatment and UK Advice

Granuloma inguinale, also known as donovanosis, is a chronic bacterial infection that primarily affects the skin and mucous membranes of the genital and anal regions. It is caused by the Gram-negative bacterium Klebsiella granulomatis. While it is significantly more common in tropical and subtropical climates, cases are occasionally diagnosed in the United Kingdom, often related to international travel or migration from endemic areas.

The infection is characterised by the development of small, painless nodules that eventually break down into open, red, velvety sores. In the UK, sexual health clinicians follow guidance from the British Association for Sexual Health and HIV (BASHH) to ensure that patients receive appropriate antibiotic therapy and follow-up care. Because the ulcers are painless, many patients delay seeking help, which can lead to complications such as secondary infections or extensive scarring.

The symptoms of granuloma inguinale appear gradually, with an incubation period ranging from one week to several months. Recognising the early signs is vital for preventing the spread of the infection and avoiding long-term damage.

• Small Red Bumps: The first sign is often a small, firm, painless pimple or nodule.
• Beefy-Red Ulcers: These nodules eventually erode into ulcers that are bright red, bleed easily when touched, and have a 'velvety' texture.
• Lack of Pain: A distinguishing feature of donovanosis is that the ulcers are usually not painful unless a secondary bacterial infection occurs.
• Foul Odour: As the condition progresses, the lesions may emit a distinct, unpleasant smell.
• Spreading: Without treatment, the ulcers can spread to the groin or the anal area, potentially causing significant tissue destruction.

Granuloma inguinale is primarily transmitted through vaginal, anal, or oral sexual contact. It is considered moderately contagious, often requiring repeated exposure for transmission to occur. However, non-sexual transmission via skin-to-skin contact is theoretically possible, though rare. In the UK, it is classified as a sexually transmitted infection (STI), and partner notification is a standard part of clinical management to prevent further community transmission.

It is important to note that the presence of genital ulcers, such as those caused by granuloma inguinale, increases the risk of acquiring or transmitting other infections, including HIV, due to the break in the skin's protective barrier.

Diagnostic Procedures

In a UK clinical setting, diagnosis typically involves taking a swab or a small tissue sample (biopsy) from the edge of an active ulcer. This sample is examined under a microscope using special stains to look for Donovan bodies—the characteristic clusters of bacteria found within immune cells. Blood tests are not used to diagnose this specific condition, as the bacteria are best identified directly from the lesion.

Treatment Options

According to NICE (National Institute for Health and Care Excellence) and BASHH guidelines, the primary treatment is a prolonged course of antibiotics. Standard options include:

• Azithromycin: Often the first-line choice, typically taken once a week for several weeks.
• Doxycycline: An alternative that may be taken twice daily for at least three weeks.
• Ciprofloxacin or Erythromycin: Used in cases where primary treatments are not suitable.

Treatment must continue until the ulcers have completely healed. Stopping medication early increases the risk of the infection returning (relapse).

Discussing genital symptoms can be difficult for many patients. Using a service like OnlineDoctor24 allows you to speak to a GP online in the UK from the comfort and privacy of your home. If you notice any unusual lumps, red sores, or changes in your genital health—especially if you have recently travelled abroad—an online consultation is a proactive first step.

An online doctor can review your symptoms, provide factual information about potential causes, and advise you on the necessary steps for testing and physical examination. While some STIs can be managed with home-sampling kits, suspected granuloma inguinale usually requires a physical assessment and specific clinical staining that may not be included in standard '6-in-1' STI kits. A UK online GP can provide a referral to a local specialist sexual health clinic for definitive diagnosis while maintaining your confidentiality.

With the correct antibiotic regime, the prognosis for granuloma inguinale is excellent. However, if left untreated, the chronic inflammation can lead to permanent scarring, narrowing of the urethra or anus (strictures), and genital swelling (elephantiasis) due to lymphatic obstruction. Prevention involves consistent use of condoms, though they may not protect against sores located outside the area covered by the condom. Regular sexual health screenings are recommended for anyone with new or multiple partners.