[Ecthyma, a known disease, of which little is known (author's transl)].

The symptoms of ecthyma are described. Treatment directed against secondary bacterial infection may consist in parenteral or local administration of antibiotics. Experimental inoculation of two commercial vaccines showed that reinoculation will take within 2-3 and five months after the first vaccination. The two vaccines produced a serological response, even after reinoculation. The fact that humoral antibodies are found to be present, is not indicative of the degree of immunity. Inoculation by scarifications will introduce pathogenic virus in a herd without producing a form of immunity, the degree and length of which are known. The virus used on vaccination will spread among the herd.