TABLE 3.

Distribution of serum specimens according to the presence of IgM to phase II C. burnetii, LCN-PCR result, and time interval from onset of symptoms

Category or characteristicNo. of specimens
Days 1 to 14Days 15 to 28Later than 28 daysTotal
Tested sera661420100
Positive LCN-PCR and titer of IgM to phase II C. burnetii of ≥1:500022
Positive LCN-PCR and titer of IgM to phase II C. burnetii of <1:50160016
Subtotal positive LCN-PCR160218
Negative LCN-PCR and titer of IgM to phase II C. burnetii of ≥1:509101837
Negative LCN-PCR and titer of IgM to phase II C. burnetii of <1:50414045
Subtotal negative LCN-PCR50141882