International Journal of Systematic and Evolutionary Microbiology, Vol 52, 1647-1654, Copyright © 2002 by Society for General Microbiology

Meiothermus taiwanensis sp. nov., a novel filamentous, thermophilic species isolated in Taiwan

M. Y. Chen, G. H. Lin, Y. T. Lin and S. S. Tsay
Department of Botany, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, 106 Taipei, Taiwan, ROC

Two novel filamentous bacterial isolates, strains WR-30(T) and WR-220, with an optimum growth temperature of approximately 55--60 degrees C were isolated from Wu-rai hot springs in the northern part of Taiwan. These isolates were aerobic, thermophilic, non-sporulating, red-pigmented and heterotrophic and formed extremely long, filamentous trichomes from cells of different lengths. Phylogenetic analysis of 16S rDNA, DNA--DNA hybridization, morphological and biochemical features and fatty acid composition revealed that the isolates represent a novel species of the genus Meiothermus. The name Meiothermus taiwanensis sp. nov. is proposed for this novel species. The type strain of M. taiwanensis is strain WR-30(T) (=ATCC BAA-399(T)=CCRC 17170(T)=DSM 14542(T)); strain WR-220 (=ATCC BAA-400=CCRC 17171=DSM 14543) is a reference strain.

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