ABSTRACT
The chromogenic cephalosporin nitrocefin was used to detect the presence of beta-lactamase in cerebrospinal fluid of patients suffering from ampicillin-resistant Haemophilus influenzae meningitis. Five samples of spinal fluid containing ampicillin-resistant isolates were studied, and all had beta-lactamase activity. When samples of spinal fluid containing 33 ampicillin-sensitive isolates and 234 sterile specimens were tested, no beta-lactamase activity was detected.
| Antimicrob. Agents Chemother. | Clin. Microbiol. Rev. |
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| Clin. Vaccine Immunol. | ALL ASM JOURNALS |
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