Fig. 2

Colonies appeared on the SCNA plates with or without supplementation of meropenem by plating 100 µL of the river sediments of 1: 100 dilution. (a), (b) and (c); actinomycete colonies appeared on the control SCNA plates, plates where 4 µg/mL and 4 µg/mL of meropenem was added, respectively. d The number of CFU/gram of soil of when the suspension of 1:100 dilution was plated on to the SCNA plates supplemented with different concentration of meropenem