[Syphilis. Part 1: Introduction, pathology and clinical aspects].

In Germany more than 3,500 people become infected with syphilis annually. As elsewhere in Western Europe there is a low level endemicity with a concentration among population subgroups with high rates of partner exchange, such as men who have sex with other men. In Germany after initially reduced numbers of cases, the incidence rate has increased after the turn of the millennium. In 2011 the incidence reached 4.5 cases per 100,000 inhabitants, which is the highest incidence since the introduction of the Infection Protection Act of 2001. Syphilis, like other sexually transmitted infections and diseases with its manifold clinical manifestations and complex diagnostics, is a large global problem for public health systems. The recent resurgence of syphilis presents a challenge for all physicians but particularly for dermatologists and venereologists because the skin and adjacent mucous membranes are initially affected. Rapid diagnosis, differential diagnosis, consequent treatment and monitoring can cure the disease. Prevention of misdiagnosis is essential otherwise severe, sometimes fatal cardiovascular complications, neurosyphilis and transfer to unborn and newborn children can occur. The synergy of syphilis and sexually transmitted human immunodeficiency virus (HIV) is of special importance. Syphilis together with genital herpes and other sexually transmitted genital and oral ulcers is an important pacemaker for HIV.