D. Reporting templates
Based on the need to now report data not only for FC citywide but also separately for each of the four zones (NW, NE, SE, SW; broken down using
College and Drake) the city has been divided into for the purpose of WNV surveillance and mosquito control, CSU had to generate a new reporting
template. This new reporting template is tailored to provide data relevant to the Level III and IV entomological triggers (see below) for control
measures in the “City of Fort Collins Program Response Guidelines to Mosquito Borne Arboviral Activity (March 2013 edition)”.
Level III
 Vector index > 0.75 and increasing
 Mosquito infection rates of > 3.0 per thousand (0.3%) and increasing
Level IV
 Vector index > 0.75.
 Sustained mosquito infection rates of > 5.0 per thousand (0.5%)
The new reporting format comprises a set of 6 tables to address the current week (1a, 2a, 3a) and to provide seasonal and historical context
(1b, 2b, 3b) (see full table formats on following pages)
 Table 1a. Vector Index for current week
 Table 1b. Vector Index for All Culex by week from June-August
 Table 2a. Vector abundance for current week
 Table 2b. Vector abundance for All Culex by week from June-August
 Table 3a. WNV infection rate per 1,000 females for current week
 Table 3b. WNV infection rate per 1,000 females for All Culex by week from June-August
1
Table 1a. Vector Index for current week
Week: 33
FC – Zone NW
FC – Zone NE
FC – Zone SE
FC – Zone SW
FC – Citywide
Mean abundance of
1
females per trap night
Cx.
Cx.
pipiens
tarsalis
5.78
15.70
20.47
2.56
12.53
Estimate for proportion of
2
females infected with WNV
Cx.
Cx.
pipiens
tarsalis
32.56
53.70
69.80
24.00
48.67
0.00316
0.00390
0.00308
0
0.00287
0
0.00183
0.00296
0.00484
0.00247
Cx.
3
pipiens
Vector Index
All
Cx.
4
5
tarsalis
Culex
0.018
0.061
0.063
0
0.036
0
0.098
0.207
0.116
0.120
0.018
0.159
0.270
0.116
0.156
0.100
0.028
0.128
12.89
24.97
0.00777
0.00112
LV
From Table 2a (CDC light trap catches only).
2
Derived from the data presented in Table 3a for estimated infection rate per 1,000 females (CDC light trap and gravid trap catches combined).
3
Vector Index for Cx. pipiens = (Mean abundance of Cx. pipiens females per trap night) x (Estimate for proportion of all Cx. pipiens females infected with WNV).
4
Vector Index for Cx. tarsalis = (Mean abundance of Cx. tarsalis females per trap night) x (Estimate for proportion of all Cx. tarsalis females infected with WNV).
5
Vector Index for All Culex = (Vector Index for Cx. pipiens) + (Vector Index for Cx. tarsalis).
1
Table 1b. Vector Index for All Culex by week from June-August
FC – Zone NW
Week
23
24
25
26
27
28
29
30
31
32
33
34
35
Current
year
0
0
0
0
0
0
0
0
NA
0.222
0.018
Historical
1
average
0.018
0
0
0
0
0
0.126
0.123
0.224
0.162
0.218
0.174
0.062
FC – Zone NE
Current
year
0
0
0
0
0
0
0
0
0.412
0.302
0.159
Historical
1
average
0.020
0
0.013
0
0.034
0.037
0.164
0.168
0.074
0.311
0.428
0.163
0.126
FC – Zone SE
Current
year
0
0
0
0
0
0
0
0.203
0.570
0.634
0.270
Historical
1
average
0.017
0.014
0
0.022
0.011
0.127
0.355
0.304
0.152
0.365
0.272
0.313
0.192
FC – Zone SW
Current
year
0
0
0
0
0
0
0
0
NA
0.020
0.116
1
Historical
1
average
0.014
0
0
0.014
0
0.012
0.041
0.102
0.072
0.107
0.051
0.074
0.198
2006-2013 (2003-2005 were excluded due to changes in trap locations from 2006 onwards).
2
FC – Citywide
Current
year
0
0
0
0
0
0
0
0.070
NA
0.352
0.156
Historical
1
average
0.021
0.004
0.003
0.010
0.012
0.051
0.193
0.191
0.131
0.259
0.255
0.192
0.149
LV
0
0
0
0
0
0
0
0.118
0.095
0.208
0.128
Table 2a. Vector abundance for current week (CDC light trap catches only)
Week: 33
FC – Zone NW
FC – Zone NE
FC – Zone SE
FC – Zone SW
FC – Citywide
Total number
females collected
Cx.
Cx.
All
pipiens tarsalis
Culex
52
157
307
23
539
293
537
1047
216
2093
Number
CDC light
trap nights
345
694
1354
239
2632
9
10
15
9
43
Mean abundance of females per
CDC light trap night
Cx.
Cx.
All
1
2
3
pipiens
tarsalis
Culex
5.78
15.70
20.47
2.56
12.53
32.56
53.70
69.80
24.00
48.67
38.33
69.40
90.27
26.56
61.21
464
899
1363
36
12.89
24.97
37.86
LV
1
Mean abundance of Cx. pipiens females per CDC light trap night = (Total number Cx. pipiens females collected) / (Number CDC light trap nights).
2
Mean abundance of Cx. tarsalis females per CDC light trap night = (Total number Cx. tarsalis females collected) / (Number CDC light trap nights).
3
Mean abundance of All Culex females per CDC light trap night = (Total number All Culex females collected) / (Number CDC light trap nights).
Table 2b. Vector abundance for All Culex by week from June-August
FC – Zone NW
Week
23
24
25
26
27
28
29
30
31
32
33
34
35
Current
year
3.22
1.33
3.44
2.44
22.56
39.22
27.00
94.11
NA
27.56
38.33
Historical
1
average
2.02
2.31
6.77
12.68
31.85
49.17
58.82
42.96
45.53
43.06
25.43
18.62
8.27
FC – Zone NE
Current
year
1.10
0.90
6.90
11.50
61.90
116.20
57.20
236.40
263.90
165.90
69.40
Historical
1
average
5.86
8.73
18.15
38.60
69.76
80.96
87.35
106.32
74.63
55.75
49.56
38.14
18.56
FC – Zone SE
Current
year
2.27
1.20
6.60
16.07
58.27
74.33
36.33
213.67
191.23
198.20
90.27
Historical
1
average
8.59
12.88
23.08
35.39
40.90
66.50
73.48
61.07
43.18
38.77
28.43
23.15
9.84
FC – Zone SW
Current
year
1.00
0.67
0.44
2.22
12.89
14.56
6.44
52.89
NA
26.67
26.56
1
Historical
1
average
0.22
0.63
2.13
6.27
12.48
12.97
21.88
12.08
12.95
13.12
6.90
6.11
3.65
2006-2013 (2003-2005 were excluded due to changes in trap locations from 2006 onwards).
3
FC – Citywide
Current
year
1.93
1.05
4.72
9.26
42.14
64.21
32.98
160.28
NA
119.07
61.21
Historical
1
average
5.21
7.07
14.20
25.01
42.47
54.78
63.27
58.46
45.38
38.66
28.28
22.45
10.36
LV
3.11
2.00
6.03
9.84
54.69
42.05
30.59
75.94
83.86
51.59
37.86
Table 3a. WNV infection rate per 1,000 females for current week (CDC light trap and gravid trap catches combined)
Week: 33
FC – Zone NW
FC – Zone NE
FC – Zone SE
FC – Zone SW
FC – Citywide
LV
Total number individuals
examined
Cx.
Cx.
All
pipiens tarsalis
Culex
323
293
616
253
537
790
676
1048
1724
206
217
423
1458
2095
3553
712
899
1611
Total number pools
examined
Cx.
Cx.
All
pipiens
tarsalis
Culex
14
11
25
16
17
33
24
30
54
10
12
22
64
70
134
40
38
78
Total number
WNV-infected pools
Cx.
Cx.
All
pipiens
tarsalis
Culex
1
0
1
1
1
2
2
3
5
0
1
1
4
5
9
5
1
6
Estimate for WNV infection
1
rate per 1,000 females
Cx.
Cx.
All
pipiens tarsalis
Culex
3.16
0
1.64
3.90
1.83
2.54
3.08
2.96
3.05
0
4.84
2.41
2.87
2.47
2.65
7.77
1.12
3.95
1
Maximum likelihood estimate (MLE) for WNV infection rate per 1,000 females calculated using the CDC PooledInfRate 4.0 plug-in for Excel.
Table 3b. WNV infection rate per 1,000 females for All Culex by week from June-August
FC – Zone NW
Week
23
24
25
26
27
28
29
30
31
32
33
34
35
Current
year
0
0
0
0
0
0
0
0
NA
7.87
1.64
Historical
1
average
9.00
0
0
0
0
0
2.02
3.03
5.06
4.07
8.85
9.82
7.66
FC – Zone NE
Current
year
0
0
0
0
0
0
0
0
1.52
2.18
2.54
Historical
1
average
4.62
0
0.74
0
0.48
0.56
1.77
1.58
1.08
5.74
8.26
4.49
6.80
FC – Zone SE
Current
year
0
0
0
0
0
0
0
0.88
2.88
3.32
3.05
Historical
1
average
2.25
1.09
0
0.61
0.25
1.92
4.59
5.22
3.69
9.70
11.00
12.13
20.00
FC – Zone SW
Current
year
0
0
0
0
0
0
0
0
NA
3.20
2.41
1
Historical
1
average
53.30
0
0
2.30
0
0.90
1.84
8.74
5.46
8.23
7.68
12.41
53.69
2006-2013 (2003-2005 were excluded due to changes in trap locations from 2006 onwards).
4
FC – Citywide
Current
year
0
0
0
0
0
0
0
0.41
NA
3.18
2.65
Historical
1
average
4.19
0.60
0.25
0.41
0.28
0.98
2.91
3.37
2.95
6.83
9.24
8.68
14.33
LV
0
0
0
0
0
0
0
1.56
1.14
4.72
3.95