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Science 16 March 1945:
Vol. 101. no. 2620, pp. 276 - 277
DOI: 10.1126/science.101.2620.276
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Articles

ON THE NATURE OF REFRACTORINESS OF CERTAIN GRAM-NEGATIVE BACILLI TO PENICILLIN

GREGORY SHWARTZMAN

The suseeptibility of certain strains of E. coli and Salmonella is significantly greater in synthetic medium than in meat infusion broth. Casein hydrolysate, asparagine, glutamic acid to a lesser degree, and possibly some other aminoacids partially antagonize the effect of penicillin upon E. coli in synthetic medium. The antagonism of casein hydrolysate and asparagine can be removed in greater part by methionine. The observations suggest that the refractoriness of Gram-negative bacilli to penicillin is at least to some extent extrinsic in nature.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
CONCERTED ANTIBIOTIC EFFECT OF PENICILLIN, METHIONINE, THREONINE AND METHIONINE SULFOXIDE UPON BRUCELLA, EBERTHELLA, SALMONELLA, AND SHIGELLA.
G. SHWARTZMAN (1945)
Science 102, 148-150
   Abstract »    PDF »
INFECTIOUS DISEASES: ELEVENTH ANNUAL REVIEW OF SIGNIFICANT PUBLICATIONS.
H. A. REIMANN (1945)
Arch Intern Med 76, 114-129
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)