title: Low frequency of co-integration of two linked streptomycin-resistance markers in Pneumococcus.
mesh_terms: D002874:Chromosome Mapping; D004269:DNA, Bacterial; D004352:Drug Resistance, Microbial; D005796:Genes; D066298:In Vitro Techniques; D009154:Mutation; D013296:Streptococcus pneumoniae; D013307:Streptomycin
chemical_list: D004269:DNA, Bacterial; D013307:Streptomycin