Determination of minimal inhibitory concentration (MIC) of herb extracts against S. agalactiae
showed that the aqueous extract of A. paniculata had the lowest MIC value (31.25 μg/mL). Aqueous extract of A. sativum was
the only herb extract with a MIC >500 μg/mL. Based on mortalities in 2 weeks after intraperitoneal S. agalactiae injection, the
median lethal dose (LD50) of S. agalactiae for Nile tilapia (Oreochromis niloticus) was 3.79×105 CFU/mL.