Susceptibility of three clinical isolates of Actinomodura madurae to α-pinene, the bioactive agent of Pinus pinaster turpentine oil

Abstract

In vitro susceptibility of the turpentine oil obtained from Pinus pinaster oleoresin was evaluated against three Sudanese clinical isolates of Actinomadura madurae, which is the main causative agent of actinomycetoma. The minimum inhibitory concentrations (MICs) of the oil ranged from 100.3 to 124.8 μL/mL, and the minimum microbicidal concentrations (MMCs) were between 100.3 and 150.0 μL/mL. α-Pinene exhibited prominent bioactivity with MICs ranging between 3.3 and 5.0 μL/mL, while its MMC was 10.0 μL/mL against the same clinical isolates. Pinus pinaster turpentine oil and α-pinene might be useful agents in the treatment of mycetoma caused by A. madurae.