Monitoring Antibiotic Residues and Corresponding Antibiotic Resistance Genes in an Agroecosystem

Table 4

Antibiotic-resistant bacteria in CFUs isolated from sediment and soil samples cultured on R2A agar plates with/without antibiotics after a 24 h incubation at 30°C.

	Plate counts of antibiotic-resistant bacteria (in CFU × 10^2)
	Sed. #1	Sed. #2	Sed. #3	Sed. #4	Soil #1	Soil #2
Control
Tetracycline (TC)			ND		ND	ND
Chlortetracycline (CTC)	ND		ND	ND		ND
Sulfamethazine (SMT)
Sulfamethoxazole (SMX)
Sulfathiazole (STZ)

Different letters in each row indicate a significant difference at 0.05.
Not detected.