Syphilis in experimental animals. Introduction Syphilis is a chronic infectious disease of humans and animals, which is caused by Treponema pallidum. It manifests itself in the form of four clinical and morphological forms: fixed, fresh, latent, stage of an incomplete episode (early congenital, late congenital). Specific prevention: a preparation from chimera bodies containing antibiotics is used to treat infectious skin and mucous lesions (ulcers, papules, plaques) caused by syphilis. Using this drug, you can also prevent the development of syphilis after sexual intercourse, where there has already been contact with a patient with syphilis