TABLE 1.

PCR results for clinical isolates of Bordetella spp. used in this study

Bordetella species	Strains	Results of conventional IS481 PCR assay
B. pertussisa	E161, E194, E144, D946	+
B. parapertussis	B160, C518, B149, D568, E201	−
B. bronchisepticab	A345, D445, D760, E010, E023	−
B. holmesiic	C690, C692, C693, C694, D130	+

^aThe IS481 gene is present at 80 to 100 copies in B. pertussis (9).

^bThe IS481 gene is present as one copy in some strains of B. bronchiseptica (Gladbach et al., Abstr. 7th Int. Symp. Pertussis).

^cThe IS481 gene is present at 8 to 10 copies in B. holmesii (5).