PCR Amplification from Fixed Tissue Indicates Frequent Involvement of Brachyspira aalborgi in Human Intestinal Spirochetosis |
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| Authors: | Andrew S J Mikosza Tom La C Josephine Brooke Christian F Lindboe Peter B Ward Ralf G Heine John G Guccion W Bastiaan de Boer and David J Hampson |
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| Institution: | Division of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, Western Australia 6150, Australia. |
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| Abstract: | PCR procedures amplifying portions of the 16S rRNA and NADH oxidase genes of Brachyspira aalborgi and Serpulina pilosicoli were applied to DNA extracted from paraffin-embedded human colonic or rectal tissues from 30 Norwegian, Australian, and U.S. patients, 16 of whom had histologic evidence of intestinal spirochetosis (IS). B. aalborgi-specific sequences were identified by PCR in 10 of the IS patients (62.5%) but none of the others, while S. pilosicoli sequences were not detected in tissues from any patient. Direct sequencing of products from three of the positive samples provided further confirmation of the presence of B. aalborgi. B. aalborgi may be a more common cause of intestinal spirochetosis than has been previously thought. |
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