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Detection of influenza viruses in respiratory specimens in 2017

Detection of influenza viruses in respiratory specimens in 2017

Week
number

Date

No. of specimen tested

Type A subtype H1

Type A subtype H3

Type A subtype H5

Type A subtype H7

Type A subtype H9

Type B

Type C

No.

%

No.

%

No.

%

No.

%

No.

%

No.

%

No.

%
1 01/01 - 07/01 3777 12 0.32 212 5.61 0 0.00 1 0.03 0 0.00 8 0.21 2 0.05
2 08/01 - 14/01 3999 21 0.53 279 6.98 0 0.00 1 0.03 0 0.00 22 0.55 7 0.18
3 15/01 - 21/01 3780 16 0.42 288 7.62 0 0.00 0 0.00 0 0.00 3 0.08 2 0.05
4 22/01 - 28/01 3464 24 0.69 261 7.53 0 0.00 0 0.00 0 0.00 19 0.55 2 0.06
5 29/01 - 04/02 4405 35 0.79 320 7.26 0 0.00 0 0.00 0 0.00 20 0.45 5 0.11
6 05/02 - 11/02 4104 25 0.61 317 7.72 0 0.00 0 0.00 0 0.00 14 0.34 3 0.07
7 12/02 - 18/02 4209 18 0.43 342 8.13 0 0.00 0 0.00 0 0.00 22 0.52 2 0.05
8 19/02 - 25/02 4321 22 0.51 345 7.98 0 0.00 0 0.00 0 0.00 28 0.65 4 0.09
9 26/02 - 04/03 4103 30 0.73 329 8.02 0 0.00 0 0.00 0 0.00 20 0.49 6 0.15
10 05/03 - 11/03 4222 16 0.38 308 7.30 0 0.00 1 0.02 0 0.00 28 0.66 4 0.09
11 12/03 - 18/03 4167 19 0.46 255 6.12 0 0.00 0 0.00 0 0.00 31 0.74 9 0.22
12 19/03 - 25/03 4095 37 0.90 220 5.37 0 0.00 0 0.00 0 0.00 31 0.76 7 0.17
13 26/03 - 01/04 4116 35 0.85 150 3.64 0 0.00 0 0.00 0 0.00 44 1.07 3 0.07
14 02/04 - 08/04 4084 35 0.86 154 3.77 0 0.00 0 0.00 0 0.00 37 0.91 11 0.27
15 09/04 - 15/04 3202 30 0.94 124 3.87 0 0.00 0 0.00 0 0.00 46 1.44 6 0.19
16 16/04 - 22/04 4951 84 1.70 244 4.93 0 0.00 0 0.00 0 0.00 68 1.37 22 0.44
17 23/04 - 29/04 3948 128 3.24 224 5.67 0 0.00 0 0.00 0 0.00 39 0.99 11 0.28
18 30/04 - 06/05 4121 145 3.52 238 5.78 0 0.00 0 0.00 0 0.00 51 1.24 9 0.22
19 07/05 - 13/05 4157 126 3.03 314 7.55 0 0.00 0 0.00 0 0.00 54 1.30 9 0.22
20 14/05 - 20/05 4366 125 2.86 421 9.64 0 0.00 0 0.00 0 0.00 40 0.92 4 0.09
21 21/05 - 27/05 4412 95 2.15 471 10.68 0 0.00 0 0.00 0 0.00 52 1.18 16 0.36
22 28/05 - 03/06 4691 107 2.28 566 12.07 0 0.00 0 0.00 0 0.00 58 1.24 11 0.23
23 04/06 - 10/06 4456 96 2.15 540 12.12 0 0.00 0 0.00 0 0.00 35 0.79 11 0.25
24 11/06 - 17/06 4429 80 1.81 596 13.46 0 0.00 0 0.00 0 0.00 38 0.86 16 0.36
25 18/06 - 24/06 4441 58 1.31 820 18.46 0 0.00 0 0.00 0 0.00 35 0.79 9 0.20
26 25/06 - 01/07 4883 79 1.62 1414 28.96 0 0.00 0 0.00 0 0.00 34 0.70 10 0.20
27 02/07 - 08/07 6153 97 1.58 2026 32.93 0 0.00 0 0.00 0 0.00 68 1.11 16 0.26
28 09/07 - 15/07 6753 108 1.60 2560 37.91 0 0.00 0 0.00 0 0.00 73 1.08 18 0.27
29 16/07 - 22/07 6839 102 1.49 2496 36.50 0 0.00 0 0.00 0 0.00 52 0.76 21 0.31
30 23/07 - 29/07 6791 42 0.62 2326 34.25 0 0.00 0 0.00 0 0.00 34 0.50 10 0.15
31 30/07 - 05/08 5742 21 0.37 1391 24.23 0 0.00 0 0.00 0 0.00 37 0.64 7 0.12
32 06/08 - 12/08 5099 23 0.45 852 16.71 0 0.00 0 0.00 0 0.00 32 0.63 12 0.24
33 13/08 - 19/08 4590 47 1.02 489 10.65 0 0.00 0 0.00 0 0.00 45 0.98 6 0.13
34 20/08 - 26/08 4214 25 0.59 299 7.10 0 0.00 0 0.00 0 0.00 50 1.19 2 0.05
35 27/08 - 02/09 3835 17 0.44 121 3.16 0 0.00 0 0.00 0 0.00 43 1.12 5 0.13
36 03/09 - 09/09 3774 25 0.66 69 1.83 0 0.00 0 0.00 0 0.00 38 1.01 4 0.11
37 10/09 - 16/09 4046 25 0.62 57 1.41 0 0.00 0 0.00 0 0.00 59 1.46 6 0.15
38 17/09 - 23/09 4123 7 0.17 49 1.19 0 0.00 0 0.00 0 0.00 52 1.26 7 0.17
39 24/09 - 30/09 3898 9 0.23 22 0.56 0 0.00 0 0.00 0 0.00 45 1.15 5 0.13
40 01/10 - 07/10 3560 10 0.28 13 0.37 0 0.00 0 0.00 0 0.00 32 0.90 8 0.22
41 08/10 - 14/10 3838 7 0.18 26 0.68 0 0.00 0 0.00 0 0.00 49 1.28 6 0.16
42 15/10 - 21/10 3653 2 0.05 26 0.71 0 0.00 0 0.00 0 0.00 41 1.12 5 0.14
43 22/10 - 28/10 3348 7 0.21 17 0.51 0 0.00 0 0.00 0 0.00 50 1.49 3 0.09
44 29/10 - 04/11 4171 9 0.22 27 0.65 0 0.00 0 0.00 0 0.00 62 1.49 4 0.10
45 05/11 - 11/11 3891 2 0.05 21 0.54 0 0.00 0 0.00 0 0.00 54 1.39 11 0.28
46 12/11 - 18/11 3780 8 0.21 11 0.29 0 0.00 0 0.00 0 0.00 48 1.27 10 0.26
47 19/11 - 25/11 3667 14 0.38 9 0.25 0 0.00 0 0.00 0 0.00 58 1.58 16 0.44
48 26/11 - 02/12 3792 11 0.29 23 0.61 0 0.00 0 0.00 0 0.00 69 1.82 15 0.40
49 03/12 - 09/12 3882 9 0.23 15 0.39 0 0.00 0 0.00 0 0.00 85 2.19 10 0.26
50 10/12 - 16/12 4094 18 0.44 18 0.44 0 0.00 0 0.00 0 0.00 104 2.54 21 0.51
51 17/12 - 23/12 4085 13 0.32 24 0.59 0 0.00 0 0.00 0 0.00 172 4.21 37 0.91
52 24/12 - 30/12 4518 41 0.91 34 0.75 0 0.00 0 0.00 0 0.00 343 7.59 23 0.51
 
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.