PUTATIVE PERIODONTOPATHOGENS IN DISEASED AND NONDISEASED PERSONS EXHIBITING POOR ORAL HYGIENE

The aim of the study was to assess the occurrence of some putative periodonto-pathogens in "test" and "control" sites in "diseased" and "non-diseased" persons, respectively, from an adult rural Kenyan population exhibiting poor oral hygiene and widespread loss of attachment (LA). 14 persons (< 35 years) were assigned to a "diseased" category on the basis of at least 4 sites with LA greater-than-or-equal-to 4 mm; at least 5 mm LA and a pocket greater-than-or-equal-to 4 mm interproximally in a lower incisor ("test" site): and less than 2 mm LA and no pocket greater-than-or-equal-to 4 mm distal to a lower canine or mesial to a lower first premolar ("control" site). Age-matched "non-diseased" persons were identified on the basis of no sites with LA > 2 mm and no pockets greater-than-or-equal-to 4 mm associated with LA. Paperpoint samples from test and control sites as well as a scraping sample from the dorsum of tongue were examined for presence of Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Bacteroides intermedius, B. melaninogenicus group, Capnocytophaga, Selenomonas spp., and Wolinella recta. P. gingivalis was found in 79% of test sites and 36% of control sites in "diseased" persons, and in 18% and 35% of test and control sites, respectively, in "non-diseased" persons. "No other bacterial group discriminated significantly between test and control sites or between diseased and non-diseased subjects. The surprisingly high occurrence of P. gingivalis in non-diseased subjects, both subgingivally and on tongue, indicates that deep periodontal pockets are not prerequisite ecological environments for P. gingivalis establishment.