A test for the venereal disease lymphogranuloma inguinale [Described 1925. After Wilhelm Siegmund Frei (1885-1943), Professor of Dermatology at Berlin, Germany. He settled in New York, USA.]
A diagnostic test for the venereal disease lymphogranuloma venereum. A small quantity of the virus, inactivated by heat, is injected into the patient’s skin. If the disease is present a small red swelling appears at the site of injection within 48 hours.