Table 4.

Base pair differences in ITS region sequences between M. intracellulare (Min-A, -B, -C, and -D) and M. chimaera (MAC-A) and the MAC X species M. colombiense (MAC-U)

ITS region sequencea	Base pair differences with ITS sequevar ofb:
	22	55	73	76	137	138	148	216	220	229	230	232	237	239	244	264	268	269	270	272
Min-A	T	C	G	C	G	A	A	G	A	A	G	G	T	C	G	C	G	G	T	T
Min-B	•	•	•	•	•	•	•	•	•	G	C	•	•	•	•	•	•	•	•	•
Min-C	•	•	•	•	•	•	•	•	•	G	T	•	•	•	•	•	•	•	•	•
Min-D	•	•	•	T	•	•	•	•	•	•	•	•	•	•	•	•	•	•	•	•
MAC-A	C	T	A	•	A	G	Tc	A	G	G	T	Ac	C	T	A	T	A	A	C	C
MAC-U	•	T	A	•	•	•	•	A	G	A	T	•	C	T	A	•	•	•	•	•

^aNote the similarity of the two MAC X species (M. chimaera and M. colombiense) and their dissimilarity with the four ITS sequences of M. intracellulare.

^b•, same base pairs as in Min-A.

^cBase pair difference unique among the M. avium complex (12).