A method for determining the sensitivity of at least one nonparaffinophilic microorganism from a specimen obtained from a patient to different antimicrobial agents and predetermined quantities thereof, said method comprising:
- a receptacle adapted to contain (i) an aqueous solution;
- (ii) an amount of antimicrobial agent to be tested;
- and (iii) said specimen;
- means for adjusting said aqueous solution to mimic the in vivo clinical conditions of said patient;
- and
- a slide coated with a carbon source, said slide being adapted to being placed in said receptacle, whereby observation of the growth of said nonparaffinophilic microorganism from said specimen on said slide can be used to determine the concentration of said antimicrobial agent necessary to resist said nonparaffinophilic microorganism growth on said slide.