Detection of parainfluenza viruses in respiratory specimens in 2023

Week number	Date	No. of specimen tested	Parainfluenza 1		Parainfluenza 2		Parainfluenza 3		Parainfluenza 4
Week number	Date	No. of specimen tested	No.	%	No.	%	No.	%	No.	%
1	01/01 - 07/01	1724	0	0.00	0	0.00	3	0.17	0	0.00
2	08/01 - 14/01	3143	0	0.00	0	0.00	13	0.41	2	0.06
3	15/01 - 21/01	2455	0	0.00	0	0.00	7	0.29	1	0.04
4	22/01 - 28/01	1465	0	0.00	0	0.00	10	0.68	2	0.14
5	29/01 - 04/02	1814	0	0.00	0	0.00	14	0.77	1	0.06
6	05/02 - 11/02	1859	0	0.00	0	0.00	23	1.24	1	0.05
7	12/02 - 18/02	1725	0	0.00	0	0.00	25	1.45	2	0.12
8	19/02 - 25/02	1651	1	0.06	0	0.00	21	1.27	3	0.18
9	26/02 - 04/03	1442	1	0.07	1	0.07	18	1.25	1	0.07
10	05/03 - 11/03	1512	1	0.07	0	0.00	27	1.79	0	0.00
11	12/03 - 18/03	1705	4	0.23	0	0.00	36	2.11	0	0.00
12	19/03 - 25/03	2102	2	0.10	0	0.00	49	2.33	0	0.00
13	26/03 - 01/04	2412	4	0.17	0	0.00	59	2.45	2	0.08
14	02/04 - 08/04	2886	2	0.07	0	0.00	71	2.46	2	0.07
15	09/04 - 15/04	5426	10	0.18	1	0.02	134	2.47	13	0.24
16	16/04 - 22/04	6784	11	0.16	1	0.01	94	1.39	12	0.18
17	23/04 - 29/04	7598	9	0.12	2	0.03	86	1.13	12	0.16
18	30/04 - 06/05	7832	19	0.24	0	0.00	72	0.92	14	0.18
19	07/05 - 13/05	8464	13	0.15	3	0.04	40	0.47	17	0.20
20	14/05 - 20/05	8440	25	0.30	1	0.01	56	0.66	18	0.21
21	21/05 - 27/05	8268	14	0.17	1	0.01	61	0.74	14	0.17
22	28/05 - 03/06	7245	20	0.28	2	0.03	67	0.92	27	0.37
23	04/06 - 10/06	4949	8	0.16	2	0.04	34	0.69	28	0.57
24	11/06 - 17/06	5304	11	0.21	1	0.02	30	0.57	43	0.81
25	18/06 - 24/06	4700	17	0.36	0	0.00	31	0.66	53	1.13
26	25/06 - 01/07	5103	20	0.39	1	0.02	36	0.71	54	1.06
27	02/07 - 08/07	4697	15	0.32	1	0.02	22	0.47	54	1.15
28	09/07 - 15/07	4620	9	0.19	1	0.02	21	0.45	37	0.80
29	16/07 - 22/07	5085	11	0.22	1	0.02	26	0.51	32	0.63
30	23/07 - 29/07	5211	1	0.02	0	0.00	18	0.35	26	0.50
31	30/07 - 05/08	5050	10	0.20	2	0.04	18	0.36	15	0.30
32	06/08 - 12/08	5135	3	0.06	1	0.02	11	0.21	12	0.23
33	13/08 - 19/08	5385	8	0.15	2	0.04	13	0.24	12	0.22
34	20/08 - 26/08	5461	7	0.13	0	0.00	28	0.51	7	0.13
35	27/08 - 02/09	4378	5	0.11	0	0.00	15	0.34	7	0.16
36	03/09 - 09/09	6732	10	0.15	3	0.04	33	0.49	6	0.09
37	10/09 - 16/09	6399	6	0.09	3	0.05	24	0.38	5	0.08
38	17/09 - 23/09	6569	13	0.20	4	0.06	39	0.59	8	0.12
39	24/09 - 30/09	6329	12	0.19	5	0.08	28	0.44	13	0.21
40	01/10 - 07/10	7204	9	0.12	3	0.04	43	0.60	18	0.25
41	08/10 - 14/10	5804	11	0.19	4	0.07	24	0.41	12	0.21
42	15/10 - 21/10	5909	8	0.14	0	0.00	29	0.49	9	0.15
43	22/10 - 28/10	5549	16	0.29	3	0.05	40	0.72	5	0.09
44	29/10 - 04/11	6306	66	1.05	13	0.21	49	0.78	21	0.33
45	05/11 - 11/11	6188	96	1.55	13	0.21	70	1.13	25	0.40
46	12/11 - 18/11	5494	59	1.07	8	0.15	70	1.27	14	0.25
47	19/11 - 25/11	6027	45	0.75	10	0.17	79	1.31	20	0.33
48	26/11 - 02/12	5929	60	1.01	10	0.17	57	0.96	29	0.49
49	03/12 - 09/12	5828	66	1.13	6	0.10	75	1.29	25	0.43
50	10/12 - 16/12	5882	52	0.88	6	0.10	87	1.48	17	0.29
51	17/12 - 23/12	5442	33	0.61	9	0.17	73	1.34	12	0.22
52	24/12 - 30/12	6642	29	0.44	3	0.05	97	1.46	18	0.27

Remarks:

1. For specimens received from 10 February 2014 onwards, molecular testing has replaced viral culture. Please interpret the data and trends in light of the enhanced sensitivity of molecular testing, and hence positive detection rates.

2. Figures are subject to minor adjustments.

3. Multiple specimens may have been received for testing from the same patient.
4. As a result of disruptions in laboratory testing from early 2020 to early 2023, please interpret the data with caution.