[Cinematographic representations of syphilis between the two world wars: seropositivity, treatment and charlatanism].

Following a series of anti-syphilitic propaganda films made between the two wars, the author questions the widely-held representations of syphilitic illness, of patients and of their management by society. He successively discusses the root of the concept of seropositivity, the treatment and of how the illness is represented, the struggle against quackery.