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Microfilaria Exam

Item Value
Approval req'd? No
Available Stat? No
Test code P409M
Performed by Microbiology
In House Availability Monday-Friday, day shift only
Method Giemsa stain of thick and thin smears
Collection Instructions Call Microbiology at x3-1268 to arrange testing. Friday samples should be received by Microbiology by 1230 hours

Note the exact time of blood draw. Two samples should be drawn, one between 1000 and 1400 hours, the other between 2200 and 0200 hours (arrange outpatient blood draw at night with the Emergency Department).
Container type Lavender top
Amount to Collect 3 mL blood
Sample type EDTA whole blood
UCSF Rejection Criteria Improperly collected sample.
Processing notes Blood specimen may be held until the day shift for making smears.
Normal range Negative
Critical value Filiaria identified
Synonyms Loa loa; filaria; Wucheria
Stability Refrigerated 3 days
Turn around times 1-3 days
Additional information Requires appropriate symptoms including fever, and eosinophilia. Review the patient's history for possible periodicity and optimal time of sampling.

If direct smears are negative, Knott concentration technique is performed and an additional charge is billed. Concentration includes centrifugation of RBC lysates and staining with Giemsa (for nuclear detail) with microscopic speciation.

Also see entries for Onchocerca and for Parasites-Urine.
CPT coding 87207
LOINC code 10663-3
Last Updated 7/29/2014 8:40:49 AM
Entry Number 387
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