Evaluation of Dirofilaria immitis antigen detection comparing heated and unheated serum in dogs with experimental heartworm infections

Table 3 Difference in the number of days from infection to confirmed positive test result between the two antigen tests (PetChek® versus DiroCHEK®) within each serum type

Serum Tested	Difference in # Days from Infection to Positive Result^a PetChek® – DiroCHEK®							p-value
	N	Mean (days)	SD^b	Min	Max	95% CI^c
	N	Mean (days)	SD^b	Min	Max	L ^d	U ^d
Heated	12	4.6	12.8	˗16	28	˗3.5	12.7	0.2405
Unheated	12	0.2	4.5	˗7	8	˗2.7	3.0	0.9009

^aBig Head™ and JYD-34 isolate data were combined for each analysis
^bSD = standard deviation
^c95% CI = 95% Confidence Interval around the mean difference
^dL = lower bound of 95% confidence interval; U = upper bound of 95% confidence interval

ISSN: 1756-3305