Ml. Landry et al., EFFECT OF DELAYED SPECIMEN PROCESSING ON CYTOMEGALOVIRUS ANTIGENEMIA TEST-RESULTS, Journal of clinical microbiology, 33(1), 1995, pp. 257-259
Blood samples held at either 4 degrees C or room temperature for 1 day
had similar mean decreases in number of cytomegalovirus antigenemia-p
ositive cells (52 to 55%) and similar false-negative test results (13
to 14%). After 2 days, samples held at 4 degrees C showed no further d
ecline, whereas samples held at room temperature had a mean 81% decrea
se in positive cells, a 32% false-negative rate, and a more marked det
erioration in cell morphology.