We performed a retrospective extended-spectrum β-lactamase (ESBL) molecular characterization of Proteus mirabilis isolates recovered from urine of spinal cord injury patients. A incorrectly detected TEM-24-producing clone and a new weakly expressed TEM-derived ESBL were discovered. In such patients, ESBL detection in daily practice should be improved by systematic use of a synergy test in strains of P. mirabilis resistant to penicillins.
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Crémet et al. (2011) studied this question.
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