International Journal of Microbiology

Research Article

Characterization of Streptomyces Isolates Associated with Estuarine Fish Chanos chanos and Profiling of Their Antibacterial Metabolites-Crude-Extract

Table 1

Preliminary screening using cross streak and evaluation of antibacterial activity using double-layer agar diffusion.
IsolatesInhibition zone (mm)
S. aureusB. cereusE. coliP. aeruginosa
Cross streakDouble-layer agarCross streakDouble-layer agarCross streakDouble-layer agarCross streakDouble-layer agar
SCA-7−−+++12.9 ± 0.47−−−−
SCA-6++11.6 ± 0.72−−−−−−
SCA-13+++14.6 ± 0.70++−−−−−
AIA-1−−++−−−−−
AIA-6−−++−−−−−
AIA-5+−−−−−−−
SCA-4−−++−+−−−
SCA-10−17.9 ± 0.50−−−−−−
SCA-9−20.6 ± 0.37−−++−+−
SCA-5+++19.5 ± 0.32+++10. 9 ± 0.28++13.5 ± 0.83+−
SCA-11+++20.6 ± 0.53+++9.8 ± 0.09+++14.9 ± 0.63++10.3 ± 0.64
AIA-12+++16.3 ± 0.77+++−++−−−
AIA-13−13.8 ± 0.49+++9.5 ± 0.06−−−−
SCA-12+10.6 ± 0.49+−++−−−
AIA-10+++21.4 ± 1.47++14.3 ± 0.62+++13.3 ± 1.04+−
AIA-9−13.0 ± 0.11−−−−−−
AIA-15−−+−−−−−
AIA-16−14.2 ± 0.09++−+−−−
SCA-8+++18.8 ± 0.14++12.2 ± 0.40++16.3 ± 1.24+−
AIA-17++18.7 ± 0.24++−++8.6 ± 0.47−−
SCA-16−−−−−−+−
SCA-17−−−−−−++−
SCA-18−9.9 ± 0.57−−−−−−
SCA-19−13.5 ± 1.61−−−−−−
SCA-20+−−−−−−−
SCA-21−−+−−−−−
SCA-22−15.9 ± 0.29−9.4 ± 0.26−−−−
SCA-23−−+−−−−−
(−): no inhibition; (+): weak inhibition; (++): moderate inhibition; (+++): good inhibition; value was mean ± SD (standard deviation) from three replication; (−): no zone of inhibition.