He investigated its positive anti-bacterial effect on many organisms, and noticed that it affected bacteria such as staphylococci and many other Gram-positive pathogens that cause scarlet fever, pneumonia, meningitis and diphtheria, but not typhoid fever or paratyphoid fever, which are caused by Gram-negative bacteria, for which he was seeking a cure at the time.
22.
He is also remembered for his work with vaccines, and his successful inoculations of the French Army against typhoid fever and paratyphoid fever, types A and B . He started these vaccinations in 1910, and they were continued during World War I . Marshals Joseph Joffre ( 1852 1931 ) and Ferdinand Foch ( 1851 1929 ) paid homage to Vincent and his medical work that saved countless lives.
23.
Those who travel to countries with poor sanitation should receive a live attenuated typhoid vaccine Ty21a ( Vivotif ), which, in addition to the protection against typhoid fever, and may provide some protection against paratyphoid fever caused by the " S . enterica " serotypes A and B . Evidence from a study of international travelers in Israel also indicates the vaccine may prevent a fraction of infections by the serotype A, although no trial confirms this.
