Diagnostic Section: 
Test Fee: 
Setup Days: 
Monday, Tuesday, Wednesday, Thursday, Friday
Turn Around Time: 
1 day
Shipping Requirements: 
Label all samples. Ship overnight with cold packs in an insulated container. Serum can be shipped refrigerated or frozen, Whole blood can only be shipped refrigerated. Ship Monday-Thursday only. Glass or plastic tube with no anticoagulant additives.
Specimen Requirements: 

1 ml Serum from Whole Blood. Whole Blood Clotted, Red Top Tube. Whole Blood Clotted, Serum Separator Tube.

Collection Protocol: 

Collect serum from clotted blood in a non-additive tube (e.g. plain red top or serum separator). When possible, transfer clear serum off the clot into a new tube. Excessively hemolyzed or lipemic samples are not acceptable for this test.

Additional Information: 

Detection of antibodies to Neorickettsia risticii (formerly Ehrlichia risticii), the causative agent of Potomac horse fever, by indirect fluorescent antibody test. Test performed at 1:20, 1:40, 1:80, 1:160, 1:320, and 1:640 dilutions. Results available same day for samples received in the lab by 11:30 am. Results can be available same day with the addition of a STAT Fee for samples received in the lab after 11:30 and by 1:00 pm. Otherwise the samples will be held until the next scheduled testing day.