TABLE 1.

Comparison of results of μ-capture IgM test based on the baculovirus-expressed antigen and Progen Immunozym FSME IgM and Focus Technologies dengue fever virus IgM capture ELISA

Reference test resulta	TBEV ME IgM result		No. of samples
	IgM negative	IgM positive
TBEV IgM negative, HI negative	88	0	88
TBEV IgM negative, HI positive	12	0	12
TBEV IgM positive, HI positive	2b	48	50
Dengue virus IgM positive, TBEV IgM negative	6	1	7

^aHI, hemagglutination inhibition.

^bIncludes two sera from one person positive for rheumatoid factor (see text).