The sensitivity of salmonellae and shigellae to streptomycin

290 Salmonella and 120 Shigella strains were examined for their susceptibility to Streptomycin using the turbidimetric method and a new procedure which utilizes an indicator system. Of the Salmonellae which frequently cause salmonella fever or septicemia, only a few strains of S. paratyphi B and S. choleraesuis showed a high resistance, while for the inhibition of numerous S. typhi and S. montevideo strains large amounts of Streptomycin were necessary. The difficulties arising in the management of salmonellosis with Streptomycin due to less sensitive strains were discussed.