Table 3.

Semiquantitative analysis of CSF-VDRL and CSF-TRUST

		CSF-TRUST (n)
Method	Titre	−	1 : 1	1 : 2	1 : 4	1 : 8	1 : 16	≥1 : 32	Subtotal
CSF-VDRL (n)	−	620	0						620
	1 : 1	19	28	2					49
	1 : 2	2	25	24	2				53
	1 : 4	1	2	19	18	1			41
	1 : 8			0	20	16	1		37
	1 : 16				2	10	7	0	19
	≥1 : 32					1	3	1	5
	Subtotal	642	55	45	42	28	11	1	824

Shadowed boxes indicate samples with identical titres of CSF-VDRL and CSF-TRUST.

Open boxes indicate samples having twofold dilution difference between CSF-VDRL and CSF-TRUST.

Upward diagonals indicate CSF-VDRL-reactive, but CSF-TRUST non-reactive (n=22).

Horizontal strike boxes indicate that CSF-VDRL titres are significantly higher than CSF-TRUST titres (n=5).

−, Negative; CSF-TRUST, toluidine red unheated serum test on cerebrospinal fluids; CSF-VDRL, venereal disease research laboratory test on cerebrospinal fluids.