Minimum Inhibitory Concentration (MIC) Profile in Bacterial Isolates from Street Food

In the present study, a total of 14 bacterial isolates were obtained from food stalls on public roads in the City of Puebla, Mexico; these bacteria can cause serious infections in public health. Antimicrobial susceptibility was evaluated with 12 different antibiotics. The purpose of the project was to determine the Minimum Inhibitory Concentration (MIC) of antibiotics for isolates exhibiting antimicrobial susceptibility using an adapted E-test technique. The main genera found in the samples were Escherichia, Klebsiella, Salmonella, and Pseudomonas, with Klebsiella being the most prevalent. Cephalothin exhibited the highest inhibition rate against the isolates, with an MIC of 2 µg/mL, indicating that a high dose is required to achieve adequate inhibition. This provides information on clinically relevant antibiotic resistance and on the agents responsible for significant gastrointestinal infections.