Date: Mon, 20 Aug 2007 14:59:42 0600

APPENDIX II-CI: Sensible, Documented Larval Program Saves the Residents of the City of Boulder from Many Cases of West Nile Virus, As Well As Saved from the Horror of Being Sprayed with Dangerous Pesticides- 8-20-07.

The residents of the City of Boulder are presented with bills from their mosquito control provider which list sites larvicided, amount and kind of materials used, with accompanying man hours worked. I wish that Longmont received such bills and had such an extensive larvicidal program, and that they had chosen the same mosquito control provider. Monthly bills submitted to the City of Longmont show no individual details at all.

Residents of Longmont have been sprayed over and over again with horrible pesticides since 2003. The results of this policy is seen in the fact that as of August 20, 2007, Boulder County has the highest number of human West Nile Virus cases in Colorado. This terrible and needless tragedy could have been avoided.

On August 20, 2007, 9 new cases were reported for Colorado: 89 percent were from the three most sprayed counties, Boulder, Larimer, and Weld; 55 Percent were from Boulder County, most from Longmont. Of the total 135 cases in Colorado, 64 percent are from these same three counties; 56 percent of all the neuroinvasive cases of West Nile Virus to date are also from these same three counties.

Date: Mon, 20 Aug 2007 14:59:42 ‑060 in Colorado0 Most of these are Longmont residents. The Proportion of Cases in the three most sprayed counties is similar.

From: rmpjc <rmpjc@earthlink.net>

To: susan l gold <susanlgold@yahoo.com>,

anne lee maziar <anne.maziar@colorado.edu>,

kirsten burris <kirsten.burris@frontrange.edu>,

brandon lundell <brandonlundell@juno.com>,

uma bacso <umabacso@indra.com>, jen sutton <jensutton2@juno.com>,

elsie klassen <asliimp@comcast.net>,

barb patton <barbpatton@earthlink.net>,

marc osborne <marcovlt@indra.com>, tom moore <trmoore@comcast.net>,

Tim Seastedt <Timothy.Seastedt@colorado.edu>,

stephanie clark <sclark1024@comcast.net>,

randy weiner <ecolaw@Bsuites.com>,

Mary Louise Chavers <kushi80306@yahoo.com>,

marty walter <walter@boulder.colorado.edu>,

kirk cunningham <kmcunnin@juno.com>,

kathleen christensen <kathjackrose@comcast.net>,

jim morris <jim@jimmorris.com>, jill sverdlove <jsverdlove@aol.com>,

cosima krueger <cardamomseed@aol.com>,

jim morris <jim@jimmorris.com>, jill sverdlove <jsverdlove@aol.com>,

cosima krueger <cardamomseed@aol.com>,

caitlin waddick <cwaddick@mindspring.com>,

betty ball <rmpjc@earthlink.net>, angela medbery <a.medbery@juno.com>

Subject: Fw: Weekly West Nile Virus Update‑August 14, 2007

Parts/Attachments:

1 OK ~219 lines Text (charset: ISO‑8859‑1)

2 Shown ~1,015 lines Text (charset: ISO‑8859‑1)

‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑

‑‑‑‑‑ Original Message ‑‑‑‑‑ From: Jonathan Koehn

To: Kevin Afflerbaugh ; Kathleen Alexander ; Andrew Bascue ; Don

Damico ; Yael Gichon ; Alice Guthrie ; Jonathan Koehn ; Joy Master ;

Kara Mertz ; Shireen Miller ; Dean Paschall ; Beth Powell ; Sarah Van

Pelt ; Elizabeth Vasatka ; rmpjc

Sent: Friday, August 17, 2007 3:19 PM

Subject: Fwd: Weekly West Nile Virus Update‑August 14, 2007

Jonathan Koehn

Environmental Affairs Manager

City of Boulder

303‑441‑1915

koehnj@bouldercolorado.gov

>>> Jonathan Koehn 8/17/2007 3:18 PM >>>

Hello Council Members,

Here is the update for the trapping week of August 14, 2007.

Summary

Boulder County Public Health (BCPH) confirmed that 3 mosquito samples

collected in the city of Boulder on Aug 8, tested positive for West

Nile Virus (WNV).

The city samples that tested positive were from the following

locations:

. city trap containing Culex erythrothorax mosquitoes at Christensen

Park (3100 Kings Ridge Blvd.);

. pooled city sample containing Culex tarsalis mosquitoes from traps

at Tom Watson Park (6180 N. 63rd), Locust/10th near Foothills

Community Park and Christensen Park (3100 Kings Ridge Blvd); and

. a pooled city sample containing Culex erythrothorax mosquitoes from

traps at Locust/10th near Foothills Community Park, South Boulder

Recreation Center (1360 Gillaspie), Gerald Stazio Ballfields (2445

Stazio) and Tom Watson Park (6180 N. 63rd).

You may notice that two of these positive samples were reported from

Culex erythrothorax mosquitoes. In past years the state has wanted

only C. tarsalis and C. pipiens mosquitoes submitted; this is the

first year for C. erythrothorax. This is also the first time a C.

erythrothorax sample has tested positive for WNV in Boulder County.

As a reminder, adult spraying is included in the plan as a

contingency measure only if monitoring suggests the level of WNV

activity poses a significant threat to human health. The City Council

approved emergency pesticide spraying for adult mosquito control only

when a threshold is met based on several factors including the number

of disease carrying mosquitoes, the presence of West Nile Virus in

those mosquitoes and human and bird cases of WNV. One of the

thresholds used by the city of Boulder is the vector index level. The

current vector index level is at .26 which is still well below the

.75 threshold approved by the Boulder city council as the critical

level that could trigger adult mosquito control.

In past years, if a pooled sample tested positive, the traps were

submitted separately the following week to pinpoint exactly where the

positive mosquitoes were coming from to minimize any possible adult

spraying. The pooled samples from last week will not be separated

this week however because the vector index level is still well below

our threshold and it is late enough in the season that BCPH would no

longer recommend emergency spraying.

The city of Boulder sent out a news release Thursday informing the

community of the testing positives, explaining why this does not mean

that we will spray for mosquitoes and reminding residents to protect

themselves from mosquitoes.

The CDPHE is now reporting 41 positive mosquito pools from Boulder

County; positives have been reported throughout the county but the

majority of positives are from the Longmont area.

As of August 16, the CDPHE is reporting 110 cases of WNV in the

state, a significant increase since last week. Twenty‑five cases are

from Boulder County; twenty‑one have been WNV fever but unfortunately

three are meningitis and one is encephalitis. We now know that at

least one of the WNV cases in Boulder County lives in the city of

Boulder. There have been three deaths from WNV this year; one is from

Boulder County and two from Denver. For a complete listing of cases

by county please refer to the following link:

http://www.cdphe.state.co.us/dc/zoonosis/wnv/HUMAN_WNV_07.HTML

Adult Mosquito Trap Data

Date

Total Number of Mosquitoes

Number of Culex Mosquitoes

Percent Culex Mosquitoes

Number of non‑Culex mosquitoes

WNV presence

June 5

656

5.3%

621

June 12

372

6.5%

348

June 19

1049

107

10.2%

942

June 26

1038

164

15.8%

874

July 3

1348

542

40.2%

806

1052

295

28%

757

Yes

July 24

1254

706

56.3%

548

July 31

858

320

37.3%

538

August 7

833

157

18.8%

676

Yes

August 14

501

17.2%

415

This week we captured 501 mosquitoes in our 16 city traps and 86 were

Culex (17.2% of total). The total number of mosquitoes, the number of

Culex and percent of Culex were all lower than the previous week of

surveillance.

Three pools of Culex mosquitoes were submitted to the Colorado

Department of Public Health and Environment (CDPHE) for WNV testing.

Results were not yet available for this week.

Mosquito Larval Control Information

Between August 7 and August 13, 275 sites were visited; 6 sites had

non‑vector mosquitoes and 36 received Bti treatments for Culex

mosquitoes.

Comparisons to last year

The total mosquito numbers (958 in 2006; 501 in 2007), the number of

Culex (427 in 2006; 86 in 2007) and the percent Culex (44.5% for

2006; 17.2% for 2007) are all lower than this week in 2006.

If you have any questions, please contact Jonathan Koehn,

Environmental Affairs Manager or Kathleen Alexander, Integrated Pest

Management Coordinator.

Have a great weekend,

Jonathan

Jonathan Koehn

Environmental Affairs Manager

City of Boulder

303‑441‑1915

koehnj@bouldercolorado.gov