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    The mycological and molecular study of Hortaea werneckii isolated from blood and splenic abscess.
    Mycopathologia 2005 Jun;159(4):495-500
    Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
    Hortaea werneckii is an environmental dematiaceous fungus found in the halophilic environment. It causes tinea nigra. We report the isolation of H. werneckii from blood and splenic abscess of two patients with acute myelomonocytic leukaemia. H. werneckii grew at room temperature but not at 37 degrees C, it was identified by biochemical tests, growth characteristics and the presence of conspicuous collarette intercalary on dividing yeast cells. The use of specific oligonucleotide primer Hor-F (5'-TGGACACCTTCA TAACTCTTG-3') and Hor-R (5'-TCACAACGCTTAGAGACGG-3') confirmed the two isolates were H. werneckii. The sequence for 281 nucleotide of HW299 and HW403 were 99% identical but differed only in one nucleotide. In vitro anti-fungal susceptibility testing showed that the isolates were resistant to amphotericin B and flucytosine.

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    Specific oligonucleotide primers for identification of Hortaea werneckii, a causative agent of tinea nigra.
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    Research Center for Pathogenic Fungi and Microbial Toxicoses, Chiba University, Chiba, Japan.
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    Research Center for Pathogenic Fungi and Microbial Toxicoses, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8673, Japan.
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    Department of Dermatology, Ryukyu University School of Medicine, Okinawa, Japan.
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    Centraalbureau voor Schimmelcultures (CBS) Baarn, The Netherlands.
    The black yeast Hortaea werneckii is known to be a causative agent of human tinea nigra but is also found in the environment. Strains from dissimilar sources were studied by polymerase chain reaction fingerprinting of nuclear DNA, using primers annealing to repetitive and random sequences. The seven groups found correspond to those known from restriction fragment length polymorphism (RFLP) studies of the mitochondrial DNA of the same strains. Read More