(4) Streptomycin Explanation: Streptomycin is an antibiotic drug, the first of a class of drugs called amino glycosides to be discovered, and it was the first antibiotic remedy for tuberculosis. It is derived from the actinobacterium Streptomyces griseus. Streptomycin is a bactericidal antibiotic. Streptomycin cannot be given orally, but must be administered by regular intramuscular injections.