Table 3.

Sensitivities and specificity of the SDFK40 for the detection of P. falciparum, retrospective samples

Results of microscopy corrected by PCR	Number	Identified as P. falciparum by SDFK40	% Sensitivity (95% C.I.)	% Specificity (95% C.I.)
All P. falciparum samples	172	111	67.9 (60.1-75.1)
Pure gametocytemia	13	3	23.1 (5.0-23.8)
Asexual parasite density 0-100/μl	22	2	9.1 (1.1-29.2)
Asexual parasite density 101-1,000/μl	55	24	43.6 (30.3-57.7)
Asexual parasite density >1,000/μl	82	82	100.0 (95.6-100.0)
Asexual parasite density >100/μl	137	106	77.4 (69.5-84.1)
All other species and no parasites seen	169	2*		98.8 (95.8-99.9)

* Both were P. malariae samples