Abstract
An alternative 16S rRNA-targeted oligonucleotide probe specific for Archaea was developed and used for detection of methanogens in anaerobic reactors. The designed probe was checked for its specificity by computer-aided comparative sequence analysis. For in situ application, optimal stringency conditions were adjusted by performing whole cell hybridization using target and nontarget organisms. Anaerobic sludge samples were examined by in situ hybridization for methanogenic populations. The relative abundance of methanogens was monitored with epifluorescence microscopy. Individual cells could be visualized with strong fluorescence signals after hybridization with the newly developed probe.
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