TABLE 3.

Matrix of simultaneous colonization by different heteroduplex types

Heteroduplex type	Observed frequencya (expected frequencyb) of simultaneous colonization by the indicated pairs of heteroduplex types
	hA7A1	h381	h23A4	hHG1691	h49417
hW83	9 (15.1)	3 (5.5)	6 (8.1)	2 (8.5)	4 (3.3)
	P = 0.02	P = 0.14	P = 0.30	P = 0.001	P = 0.63
h49417	4 (2.5)	1 (0.9)	2 (1.3)	1 (1.4)
	P = 0.26	P = 0.92	P = 0.54	P = 0.70
hHG1691	3 (6.3)	1 (2.3)	0 (3.4)
	P = 0.07	P = 0.28	P = 0.0005
h23A4	7 (6.1)	2 (2.2)
	P = 0.63	P = 0.87
h381	2 (4.1)
	P = 0.16

^aIn 149 colonized subjects. 

^bBased on the likelihood ratio chi-square test.