An evaluation was carried out of the types of Streptococcus spp. (excluding Streptococcus pyogenes) isolated from infectious skin diseases, and their susceptibilities to eight antimicrobial drugs of the Streptococcus spp. isolated. The types of diseases were also evaluated. A total of 29 Streptococcus spp. were identified and Streptococcus agalactiae was the most common. Streptococcus spp. were found to be susceptible to the eight antimicrobials used except gentamicin; susceptibility to gentamicin varied according to species. Susceptibility to beta-lactams was 100% and this drug should be considered the antimicrobial of choice in Streptococcus spp. treatment.