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: 32
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
3.00
20.90
15.40
1.89
11.26
Estimate for proportion of
2
females infected with WNV
Cx.
Cx.
pipiens
tarsalis
24.56
145.00
182.80
24.78
107.81
0
0.00474
0.00467
0.01064
0.00532
0.00904
0.00140
0.00307
0
0.00271
Cx.
3
pipiens
Vector Index
All
Cx.
4
5
tarsalis
Culex
0
0.099
0.072
0.020
0.060
0.222
0.203
0.562
0
0.292
0.222
0.302
0.634
0.020
0.352
0.070
0.138
0.208
7.49
44.11
0.00941
0.00312
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
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
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
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
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
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
Table 2a. Vector abundance for current week (CDC light trap catches only)
Week: 32
FC – Zone NW
FC – Zone NE
FC – Zone SE
FC – Zone SW
FC – Citywide
Total number
females collected
Cx.
Cx.
All
pipiens tarsalis
Culex
27
209
231
17
484
221
1450
2742
223
4636
Number
CDC light
trap nights
248
1659
2973
240
5120
9
10
15
9
43
Mean abundance of females per
CDC light trap night
Cx.
Cx.
All
1
2
3
pipiens
tarsalis
Culex
3.00
20.90
15.40
1.89
11.26
24.56
145.00
182.80
24.78
107.81
27.56
165.90
198.20
26.67
119.07
277
1632
1909
37
7.49
44.11
51.59
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
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
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
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
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
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
Table 3a. WNV infection rate per 1,000 females for current week (CDC light trap and gravid trap catches combined)
Week: 32
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
36
222
258
444
1453
1897
464
2756
3220
72
223
295
1016
4654
5670
631
1668
2299
Total number pools
examined
Cx.
Cx.
All
pipiens
tarsalis
Culex
9
11
20
19
34
53
23
65
88
8
9
17
59
119
178
44
55
99
Total number
WNV-infected pools
Cx.
Cx.
All
pipiens
tarsalis
Culex
0
2
2
2
2
4
2
8
10
1
0
1
5
12
17
5
5
10
Estimate for WNV infection
1
rate per 1,000 females
Cx.
Cx.
All
pipiens tarsalis
Culex
0.00
9.04
7.87
4.74
1.40
2.18
4.67
3.07
3.32
10.64
0.00
3.20
5.32
2.71
3.18
9.41
3.12
4.72
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
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
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
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
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
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