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This paper reports on a 71-year-old Caucasian male who underwent neurosurgery for an oligodendroglioma, followed by a cranial-sinus fistula and cerebrospinal fluid rhinorrhea. The clinical course was complicated due to an extensively drug-resistant Acinetobacter baumannii meningitis. The patient was treated with colistin methanesulfonate, intrathecal for 24 days and intravenous for 46 days. In addition, the patient received meropenem and teicoplanin to treat a bacterial aspiration pneumonia, probably caused by methicillin resistant Staphylococcus aureus and multi drug-resistant Klebiesella pneumoniae. Cerebrospinal fluid trough colistin levels resulted above the MIC of A. baumannii. Colistin cerebrospinal fluid accumulation over the treatment period was not reported. Meningitis was cured and A. baumannii eradicated. No side effects from the antimicrobial therapy were observed.
In conclusion, this case highlights the issues in treating infections caused by resistant Gram-negative bacteria and supports previous findings on the efficacy, pharmacokinetic and tolerability of intravenous and intrathecal colistin treatments.
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