Streptomycin has been authorized for restricted use in the prevention of the fire blight disease of pome fruit orchards in the EU and Switzerland. This study addresses the important topic of the influence of the use of streptomycin in agriculture on the total bacteria community within the soil ecosystem. Soil samples were taken from soils under apple trees, prior to streptomycin application and...

With purified initiation-free polysomes of E. coli, whether endogenous or formed in vitro on phage R17 RNA, streptomycin causes partial inhibition of chain elongation. The degree of inhibition is constant over a broad range of streptomycin concentration and decreases markedly with increasing Mg(++) concentration. Hence, streptomycin evidently complexes readily with polysomal ribosomes, causing ...

A resistance (R) factor- containing strain of Escherichia coli which is known to inactivate streptomycin by adenylylation has been shown to be spectinomycin resistant. An osmotic shockate of this strain catalyzes the formation of the biologically inactive spectinomycin adenylate, in which the adenylyl residue is probably attached to a d-threo methylamino alcohol moiety of spectinomycin. Both th...

We studied the effect of many years of streptomycin use in apple orchards on the proportion of phyllosphere bacteria resistant to streptomycin and bacterial community structure. Leaf samples were collected during early July through early September from four orchards that had been sprayed with streptomycin during spring of most years for at least 10 years and four orchards that had not been spra...

The problem of drug resistance has become an important limiting factor in the therapeutic efficiency of streptomycin (Buggs et al., 1946; Finland et al., 1946; Bondi et al., 1946). We have previously shown in the case of streptomycin that of 13 strains tested all had the ability to throw off, spontaneously, variants resistant to streptomycin (Klein and Kimmelman, 1946; Klein, 1947). The destruc...

Several streptomycin-resistant mutants of Escherichia coli have been isolated which require exogenous isoleucine for growth. The majority of these strains were of streptomycin-dependent phenotype. If grown in the absence of streptomycin, these streptomycin-dependent auxotrophs (Sm(d-aux)) strains were unable to produce beta-galactosidase and aldolase activities and also failed to exhibit donor ...

ALTHOUGH the toxic effects of streptomycin on the eighth nerve are well known, it is perhaps not so widely appreciated that loss of vision may complicate the administration both of streptomycin and of chloramphenicol. A patient is described who became partially blind during combined streptomycin and chloramphenicol therapy and in whom streptomycin was at first considered to be the toxic agent. ...

The biological inactivation of streptomycin in acid and alkaline solution was first noted by Waksman and his coworkers (1). In a recent review, Waksman and Schatz (2) reported that solutions of crude streptomycin maintained their original potency during 15 to 17 days at 37’, but at 100’ about 50 per cent of the activity was lost in 10 minutes. However, the pH of the solutions was not indicated....