“…As in other forms of periodontitis, PLS patients seem to have increased susceptibility to infections with periodontitisassociated pathogens such as A. actinomycetemcomitans (1,5,7,13,17,18,20,22,33,41,42,46,53,59,60,67,70,74,75,76). This facultative anaerobic gram-negative pathogen produces virulence factors to promote its colonization and survival (61).…”