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Filifactor alocis, a Gram‐positive anaerobic rod, is now considered one of the marker organisms associated with periodontal disease. Although there was heterogeneity in its virulence potential, this bacterium was shown to have virulence properties that may enhance its ability to survive and persist in the periodontal pocket. To gain further insight into a possible mechanism(s) of pathogenesis, the...
Extracytoplasmic function (ECF) sigma factors are known to play an important role in the bacterial response to various environmental stresses and can significantly modulate their pathogenic potential. In the genome of Porphyromonas gingivalis W83, six putative ECF sigma factors were identified. To further evaluate their role in this organism, a PCR‐based linear transformation method was used to inactivate...
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