Journal
JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY
Volume 34, Issue 3, Pages 203-211Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10295-006-0187-z
Keywords
biofilm; paper machine; 16S rRNA; quantitative RT-PCR; Meiothermus
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Colored biofilms cause problems in paper industry. In this work we used real-time PCR to detect and to quantitate members of the genus Meiothermus from the process samples and end products from 24 machines manufacturing pulp, paper and board in four countries. The results obtained from 200 samples showed the importance of members of the genus Meiothermus as ubiquitous biofoulers in paper machines. This genus was the dominant biofouler in some mills. From <= 10(4) to 10(11) copies of Meiothermus 16S rRNA genes were found per gram of process deposit (wet weight). Meiothermus spp. were found in paper and board products with colored defects and connection between deposit-forming microbes and end-product spots was shown. 16S rRNA gene sequences of 29 biofilm producing bacterial isolates from different mills were determined. Based on sequence data, 25 of the isolates were assigned to the genus Meiothermus, with Meiothermus silvanus and M. ruber as the most frequent species.
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