Table 6.

Diagnostic values of different methods with a real-time polymerase chain reaction as the gold standard

	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	PLR
Serology (IgM antibodies)	80.00	98.63	88.89	97.30	58.40
Serology (fourfold increase IgG antibodies)	90.00	97.26	81.82	98.61	32.85
Culture	90.00	100.00	100.00	98.65

Date are presented as percentage.

RT-PCR: real-time polymerase chain reaction; PPV: positive predictive value; NPV: negative predictive value; PLR: positive likelihood ratio.