Table 2.

Donor and Recipient Transmission Classification Based on Dengue Virus (DENV) Test Results

Transmission Category, Case No.	Component	Donor			Blood Recipient
		IgM Result	IgG Result	VL (copies/mL)	Before Transfusion		After Transfusion
					NAT Result	IgM Result	IgM Result; Day of Sample Collection	NAT-Based VL (copies/mL); Day(s) of Sample Collection
Probable
1	PLT	−	+	200	NR	−	−; 5	48; 5
2	Plasma	−	+	2720	NR	−	−; 6	200; 6
3	RBC	−	+	1546	NR	NA	−; 5	100; 5
4	RBC	−	−	84 400	NA	NA	+; 5	100; 5
5	PLT	+	+	36	NA	NA	−; 6	64 700; 6
Possible
6*
Unit 1	Plasma	+	+	48	NR	−	+; 15	−; 15
Unit 2	Plasma	−	+	200	NR	−	+; 15	−; 15
Nontransmission casesa
7	RBC	−	+	4010	+ (200)	−	+; 4	−; 4, 11
8	PLT	NA	NA	NA	NR	+	−; 9	−; 9, 14, 19
9	RBC	−	+	200	NR	+	−; 7	−; 7
10
Unit 1	Plasma	−	+	12	NR	−	+; 4	−; 4, 11, 18
Unit 2	Plasma	−	+	339	NR	+	+; 6	−; 6, 13
Unit 3	Plasma	−	+	48	NR	+	+; 7	−; 7
11	RBC	−	+	48	NR	NA	+; 5	−; 5, 11
Nontransmission
12	PLT	+	−	852	NR	NA	−; 3	−; 3
13	RBC	+	+	49 500	NR	NA	−; 6	−; 6
14	Plasma	+	+	24	NR	NA	−; 4	−; 4
15	RBC	+	+	100	NR	−	−; 8	−; 8
16	PLT	−	+	1200	NR	−	−; 6	−; 6, 20
17	RBC	−	+	15 210 000	NR	−	−; 9	−; 9
18	PLT	−	+	1987	NR	−	−; 9	−; 9
19	PLT	−	+	200	NR	NA	−; 6	−; 6, 13
20	RBC	−	+	200	NR	NA	−; 7	−; 7, 12
21	RBC	−	+	200	NA	NA	−; 7	−; 7
Inconclusive
22	Plasma	−	+	27	NA	NA	+; 17	NR; 17

Abbreviations: −, negative; +, positive; IgG, immunoglobulin G; IgM, immunoglobulin M; NA, not available; NAT, nucleic acid test; NR, nonreactive; PLT, platelets; RBC, red blood cells; VL, virus load.

^a All had signs of infection before transfusion of the DENV RNA–positive unit.

* Two DENV RNA-positive units were transfused on the same day.