use was made of four groups of six pigs each , weighing 40 to 50 kg to follow up the toxicity of pharmachim 's apramycin in the form of water-soluble powder of apramycin sulfate , given at the rate of ( nil ) , 300 , 500 , and 1,000 mg per liter of drinking water in the course of 35 days .
C0052231
toxicity
C0521895
apramycin sulfate