Abstract
Conclusions
1. Methyl- and thiourea are bacteriostatic for Gram-negative bacteria. 2. The substitution of an -XHa group by-CH3 in urea results in no demonstrable increase in antibacterial activity. 3. The replacement of the = O group in urea by -Sincreases markedly the antibacterial activity. 4. Methyl urea, in the concentrations studied, does not potentiate the sulfonamides. It does have a moderate antagonistic effect on p-aminobenzoic acid.
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