Abstract
An examination of 99 field and reference strains of Citrobacter freundii showed 79% of them to be resistant to cephaloridine and sensitive to carbenicillin, while 96% of 45 field and reference strains of Citrobacter koseri examined were sensitive to cephaloridine and resistant to carbenicillin. Susceptibility tests with these two antibiotics are therefore useful in separating the two species of Citrobacter.
MeSH terms
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Ampicillin / pharmacology
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Arginine / metabolism
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Carbenicillin / pharmacology*
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Cephaloridine / pharmacology*
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Citrobacter / classification
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Citrobacter / drug effects*
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Citrobacter / metabolism
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Escherichia / drug effects*
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Hydrogen Sulfide / metabolism
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Indoles / metabolism
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Malonates / metabolism
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Microbial Sensitivity Tests
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Ornithine / metabolism
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Penicillin Resistance*
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Species Specificity
Substances
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Indoles
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Malonates
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Ampicillin
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Arginine
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Ornithine
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Carbenicillin
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Cephaloridine
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Hydrogen Sulfide