TABLE 1.

Proportional recoveries of suspected periodontal pathogens by three anaerobic culture systems

Bacterium	% of pathogens recovered						Pa	Proficiencyb
	Coy chamber		GasPak		AnaeroPack
	Mean (SD)	Range	Mean (SD)	Range	Mean (SD)	Range
Porphyromonas gingivalis	3.69 (7.28)	0–39.53	4.11 (8.29)	0–38.01	3.29 (6.85)	0–28.95	0.81
Prevotella intermedia	4.25 (7.82)	0–39.61	3.65 (7.14)	0–38.27	3.62 (6.34)	0–27.36	0.12
Bacteroides forsythus	1.09 (1.81)	0–8.84	1.67 (3.40)	0–22.22	0.99 (2.44)	0–14.89	0.0006	C or G > A
Campylobacter sp.	2.47 (5.02)	0–38.89	0.56 (1.42)	0–7.41	0.60 (1.74)	0–12.63	0.001	C > A or G
Eubacterium sp.	1.00 (1.95)	0–10.25	0.67 (1.16)	0–4.70	0.72 (1.37)	0–5.66	0.009	C > A or G
Fusobacterium sp.	2.84 (4.25)	0–26.88	2.94 (3.84)	0–25.21	3.98 (4.07)	0–17.98	0.0001	A > C or G
Peptostreptococcus micros	5.30 (7.49)	0–37.25	6.19 (8.10)	0–39.06	3.47 (4.72)	0–20.61	0.0001	C or G > A

^aBy nonparametric analysis of variance. 

^bC, Coy chamber; G, GasPak system; A, AnaeroPack system.