Lymphogranuloma venereum (LGV) : Swiss AIDS Federation

Lymphogranuloma venereum (LGV)

The sexually transmitted infection lymphogranuloma venereum (LGV) is caused by subtypes of the bacterium Chlamydia trachomatis. Until the early 2000s, LGV was very rare in Switzerland. Since then, however, there has been an increase in infections, particularly among HIV-positive men who have sex with men.

How is lymphogranuloma venereum transmitted?

LGV is transmitted through vaginal, oral or anal intercourse, as well in group sex situations, for example through shared sex toys.

What are its symptoms and its consequences?

LGV is characterized by pronounced symptoms, initially as an ulcer (lump, open wound) in the area of the anal or vaginal mucosa or on the penis (rarely inside the mouth). Later symptoms include extremely painful swelling and redness in the groin (rarely on the neck), which can open and release pus. Fever and a strong feeling of illness are also common. Infestation of the anus and rectum manifests through severe pain during bowel movements as well as mucus and blood in the stool. In the absence of treatment or late treatment, the infection can cause severe lesions which require surgical intervention.

How is lymphogranuloma venereum tested for?

The diagnosis for LGV is usually made by the doctor. If an LGV test is necessary, it initially involves analysis of a mucosal swab of the affected areas for chlamydia, followed by LGV subtype testing. In the absence of symptoms, routine testing for LGV is not recommended.

How is lymphogranuloma venereum treated?

The infection can be cured with antibiotics. Changes to the skin and internal scarring may have to be treated surgically.

Should sexual partners get treatment as well?

The person concerned should consider, together with her or his doctor, where the infection came from and whom it might already have been passed on to. Those sexual partners should be informed about the diagnosis, so they can get a medical exam and, if necessary, treatment.

In case of an ongoing sexual relationship, both partners need to be treated simultaneously. Consistent treatment takes three weeks.

How can the (re)infection be prevented?

If you have changing or multiple sexual partners during the same time period, talk to your doctor or another specialist about sexually transmitted infections (including HIV) and get advice on whether tests may be necessary, and if so, which ones.

In case of an infection, provides tips on how to inform your partner.

Source: Federal Office of Public Health (FOPH) 2022,

Data protection, cookies and privacy

This website complies with Swiss data protection legislation. More information in our "Privacy Statement".

Data protection, cookies and privacy

This website complies with Swiss data protection legislation. Your privacy is important to us and we process your data in accordance with these regulations. You will find further information in our "Privacy Statement". By using our website, you consent to the processing of your data in accordance with these regulations.

Necessary cookies

Necessary cookies are essential for the proper functioning of our website. They enable you to navigate our website, access secure areas and use basic functions. Without these cookies, our website cannot function properly. They do not store any personally identifiable information and are usually defined as a response to your actions, such as setting your privacy preferences, logging in or filling out forms. You can set your browser to block these cookies, but some parts of our website may not work properly if you do.

Analytics cookies

Analytics cookies help us improve our website by collecting information about how it is used. They help us understand how visitors interact with our website, which pages are most popular and how they get to our website. This information is collected anonymously and in aggregate form, which means that it does not contain any personally identifiable information. We use this information to continually improve our website, its content and the user experience. If you prefer not to allow these cookies, you can disable them, but this may affect the quality of your experience on our website.

Integrated content

We use third-party services to provide features and display useful content on our website. For example, for integrated videos, we use YouTube, which sets cookies to analyse video traffic and improve your user experience. You can accept or reject these cookies.

Your cookie preferences have been saved.