Penicillium Marneffei: Types and Drug Susceptibility
Overview
Pharmacology
Affiliations
The PCR fingerprints of 30 Penicillium marneffei isolates from Chiang Rai in Northern Thailand and Bangkok in central Thailand were studied through use of single-nucleotide primers (GACA)4 and the phage M13 core sequence. Discrimination of fingerprint patterns was based on differences in the number of major bands. The P. marneffei isolates were divided into four types, i.e., A, B, C, and D. Type A was found in two isolates from Chiang Rai (6.7%). Types B and C respectively were found in two (6.7%) and one (3.3%) isolates from Bangkok. The predominate type D (83.3%) was found in isolates obtained from Chiang Rai and Bangkok. The PCR fingerprinting method was found to be useful for the epidemiological study of P. marneffei, a dimorphic opportunistic fungus and an emerging pathogen in the HIV pandemic. In vitro drug susceptibility testing by broth macrodilution to four antifungal agents against the yeast form of P. marneffei was performed. The MIC ranges for amphotericin B, fluconazole, itraconazole, and ketoconazole were 0.125-0.5, 4.0-8.0, < 0.032, and < 0.125 microgram/ml respectively.
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