TABLE 2.

Comparison of disk diffusion results on BGA and RL−C by using the direct suspension method

Antimicrobial agent	BGA		RL−C
	No. of isolates	Zone diameters (mm)	No. of isolates	Zone diameters (mm)
Erythromycin	5	6	5	6
	47	42–46	47	43–46
Rifampin	52	26–31	52	16–24
Chloramphenicol	52	33–40	52	30–42
Trimethoprim-sulfamethoxazole	52	21–31	52	23–30