Evolution of mouse intestinal and blood immunoglobulins after oral route vaccination

: The authors have studied the mice immunoglobulins level after vaccination by oral route with a killed-pathogenic strain of Salmonella typhimurium and an avirulent mutant of the same bacteria. The obtained results show an increase of the intestinal IgA and IgG1 levels and a slighter one of sera IgG between the 10 th and 30 th day following immunization. No correlation was observed concerning the IgM, IgG and IgA levels and the mice protection against a challenge of pathogenic bacteria.