In order to use an appropriate inoculum concentration in the agar disc diffusion tests, a standard growth curve for each microorganism was prepared. Briefly, the overnight culture of each microorganism, obtained as described above, was diluted 100 times in 10 ml MHB for bacteria and SLM for the yeast. The test tubes containing the diluted cell suspension were incubated at 37 C for bacteria and 30 C for the yeast. Optical density was measured at 420 nm every hour for E. coli, S. aureus and P. aeruginosa and every 2 h for C. albicans. The corresponding microbial growth (CFU/ml) was determined by plating 100 ll of a serial dilution of each suspension
on Plate Count Agar (Oxoid, CM0003) for bacteria and on SDA for the yeast. Each dilution was plated in duplicate and the plates were incubated for 24 h at 37 C for bacteria and 48 h at 30 C for the yeast.
In order to use an appropriate inoculum concentration in the agar disc diffusion tests, a standard growth curve for each microorganism was prepared. Briefly, the overnight culture of each microorganism, obtained as described above, was diluted 100 times in 10 ml MHB for bacteria and SLM for the yeast. The test tubes containing the diluted cell suspension were incubated at 37 C for bacteria and 30 C for the yeast. Optical density was measured at 420 nm every hour for E. coli, S. aureus and P. aeruginosa and every 2 h for C. albicans. The corresponding microbial growth (CFU/ml) was determined by plating 100 ll of a serial dilution of each suspensionon Plate Count Agar (Oxoid, CM0003) for bacteria and on SDA for the yeast. Each dilution was plated in duplicate and the plates were incubated for 24 h at 37 C for bacteria and 48 h at 30 C for the yeast.
การแปล กรุณารอสักครู่..