Is a positive Christie-Atkinson-Munch-Peterson (CAMP) test sensitive enough for the identification of Streptococcus agalactiae?

Table 1 ID results of five suspected strains by four methods

Strain numbers	Biochemical identification		Fluorescent PCR		MALDI-TOF MS		16S rDNA identification
Strain numbers	Confidence (%)	ID results	Ct values^*	ID results	Log score values	ID results	Identity (%)	ID results
49	99	GBS	23 (positive)	GBS	2.221	GBS	100(6)^**	GBS
50	98	GBS	28 (grey zone)	GBS	2.478	GBS	100(6)	GBS
51	98	GBS	No Ct	No GBS	2.317	GBS	99(6)	GBS
53	99	GBS	27 (grey zone)	GBS	2.236	GBS	100(6)	GBS
54	99	GBS	27 (grey zone)	GBS	2.169	GBS	100(6)	GBS
ATCC 13813	99	GBS	23 (positive)	GBS	2.436	GBS	100(5) & 99(1)	GBS
ATCC 19615	99	S.pyogenes	No Ct	No GBS	2.382	S.pyogenes	100(6)	S.pyogenes
ATCC 25923	0	UNIORG***	No Ct	No GBS	2.357	S.aureus	100(6)	S.aureus

*Positive control: < 23, Negative control: =30 or No Ct
**Figures in brackets denote the number of similar sequences
***SMIC/ID-2 cards are dedicated to the identification of streptococcus and cannot identify staphylococci

ISSN: 1471-2334