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In Vitro Susceptibilities of Naegleria fowleri Strain HB-1 to Selected Antimicrobial Agents, Singly and in Combination

The overall prognosis of primary amoebic meningoencephalitis remains poor. The results of this study support previous finding that amphotericin B is the most efficacious drug against the Naegleria species in in vitro testing. In addition, the methyl ester of amphotericin B, a new derivative, also appears to be an effective agent. Of the drug combinations studied, amphotericin B plus minocycline and amphotericin B plus tetracycline showed synergy. The clinical significance of these findings remains to be determined.