HomeMy WebLinkAboutMemo - Mail Packet - 8/23/2022 - Memorandum From Matt Parker Re: West Nile Virus (Wnv) - Week 32 Update 1745 Hoffman Mill Road
PO Box 580, Fort Collins, CO 80522-0580
MEMORANDUM
Date: August 16, 2022
To: Mayor and City Councilmembers
From: Matt Parker, Sr. Supervisor, Natural Areas
Amy Resseguie, Lead Specialist, Communications & Public Involvement
Through: Kelly DiMartino, City Manager
Tyler Marr, Interim Deputy City Manager
CC: Seve Ghose, Director, Community Services
Mike Calhoon, Director, Parks
Katie Donahue, Director, Natural Areas
Ginny Sawyer, Sr. Project Manager
Subject: West Nile virus (WNV) Week 32 Update
Summary:
mosquito treatments. Regionally, WNV continues to amplify, specifically in the Berthoud area.
However, local data shows a 5-trap area with a vector index value of 0.51, below
threshold of 0.75.
Current Vector Index:
Week No: 32 Vector Index
Threshold:
Previous Week Vector
Index:
Current Vector
Index:
FC Zone NW NA 0.00 0.06
FC Zone NE NA 0.00 0.10
FC Zone SE NA 0.27 0.14
FC Zone SW NA 0.18 0.19
FC Citywide NA 0.15 0.14
Floating Zone 0.75 0.66 0.51
Current Conditions: Six traps detected WNV-positive mosquitoes, with a continued focus in the
southeast area of the city. While the previous application seemingly pushed down both
abundance and the infection rate, the abundance is beginning to rebuild. Overnight temperature
decreases will begin to slow mosquito reproduction; however, that will not significantly occur
until the last week of August and first week of September.
City of Fort Collins
Process for Spray Recommendations: Current WNV conditions do not exceed the policy
thresholds identified for adult mosquito spraying applications. However, when
network shows WNV activity beyond the threshold of 0.75, the LCDHE makes a
recommendation that the City conduct an application to treat adult mosquitoes. When an
application is recommended, areas of concern are identified based on data from a minimum of 5
traps. Identified treatment areas may be sub-zone or may cross zone boundaries.
Outreach and Public Awareness:
Public outreach is underway including social media posts, utility bill inserts and other
advertising.
Drain standing water, Dress in long pants and sleeves to deter biting, Defend with EPA-
approved repellant, and avoid the high mosquito activity time between Dusk & Dawn.
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