Diagnosis  
Species Generalized aggressive periodontitis Severe chronic periodontitis Healthy P-value
Capnocytophaga ochracea 35 (94.6) 51 (96.2) 95 (78.5) .002*
Dialister pneumosintes 30 (81.1) 44 (83.0) 72 (59.5) .002*
Mogibacterium timidum 23 (62.2) 49 (92.5) 93 (76.9) .002*
Treponema amylovorum 25 (67.6) 23 (43.4) 42 (34.7) .002*
Micromonas micros 33 (89.2) 52(98.1) 91(75.2) .001*
Selenomonas sputigena 33 (89.2) 50  (94.3) 88 (72.7) .001*
Actinobacillusactinomycetemcomitans 16 (43.2) 35 (66) 35 (28.9) .000*
Porphyromonas gingivalis 35 (94.6) 51 (96.2) 67 (55.4) .000*
Treponema denticola 32 (86.5) 51(96.2) 68 (56.2) .000*
Eikenella corrodens 10 (27.0) 0 (.0) 61 (50.4) .000*
Fusobacterium nucleatum 28 (75.7) 49 (92.5) 69 (57.0) .000*
Porphyromonas endodontalis 23 (62.2) 14 (26.4) 70 (57.9) .000*
Prevotella intermedia 24 (64.9) 46 (86.8) 45 (37.2) .000*
Slackia exigua 23 (62.2) 40 (75.5) 12 (9.9) .000*
Treponema maltophilum 30 (81.1) 37 (69.8) 52 (43.0) .000*
Treponema medium 28 (75.7) 40 (75.5) 44 (36.4) .000*
Treponema vincentii 17 (45.9) 5 (9.4) 27 (22.3) .000*
Prevotella tannerae 17 (45.9) 30 (56.6) 61 (50.4) .589
Eubacterium saphenum  1 (2.7) 0  (0.0) 1 (0.8) .419
Campylobacter rectus 33 (89.2) 50 (94.3) 101 (83.5) .131
Centipeda periodontii 20 (54.1) 42 (79.2) 76 (62.8) .031
Prevotella nigrescens 23 (62.2) 42 (79.2) 102 (84.3) .015
Capnocytophaga sputigena 25 (67.6) 40 (75.5) 63 (52.1) .009
Tannerella forsythensia 37 (100.0) 52 (98.1) 106 (87.6) .009
Treponema socranskii 28 (75.7) 50 (94.3) 87 (71.9) .004
Table 2: The distribution of bacteria detected in plaque samples of subjects according to the type of periodontal disease.