TABLE 1.

Virus isolation results using serum samples from ZIKV-infected tree shrews

Sample no.	Initial viral loads		After passage in C6/36 cells		Result assessmenta
	CT value	Log RNA copies/ml	CT value	Log RNA copies/ml
01	28.94	6.37	34.83	4.62	Negative
13	31.22	5.74	37.48	3.89	Negative
14	30.87	5.84	33.23	5.07	Negative
17	31.92	5.55	32.98	5.14	Negative
20	30.45	5.95	22.59	8.03	Positive
21	29.92	6.10	16.85	9.63	Positive
22	28.74	6.42	16.83	9.63	Positive
23	28.98	6.35	19.66	8.85	Positive
24	30.02	6.07	17.61	9.42	Positive
25	30.31	5.99	33.39	5.02	Negative

^aAn increase in the RNA copy number of at least 100-fold was defined as positive for virus isolation (in bold).