Possible reflex to RMSF, IgG, IFA
Establish the diagnosis of infection due to Rickettsia in the spotted fever group
Spin
Gold serum separator (SST) tube
Ambient (preferred) - 14 days
Refrigerated - 14 days
Frozen - 14 days
Enzyme immunoassay (EIA) with indirect fluorescent antibody (IFA) titer on positives
Negative: <1:64
Positive: 1:64
Recent/active: >1:64