CSTE Peer-to-peer: Washington & Minnesota Departments of Health - PowerPoint Presentation

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CSTE Peer-to-peer: Washington & Minnesota Departments of Health

Liz Dykstra, PhD, BCE

Public Health Entomologist

Mosquito-Borne Arboviruses - WA

Disease

Human Cases

2018 - 2019# WA Mosquitoes Tested – 2019# WA Positive Pools – 2019SLE00-0/762WEE00-0/679WNV3*571,23127/1,616Chikungunya*12--Dengue*212--Zika*12--

*Travel-related

Reported Tick-borne Disease Cases in Humans, Washington, 2018-2019

DISEASE

2018 cases

2019 cases Lyme disease*1826Q fever23Tularemia**33Tick-borne Relapsing Fever25Spotted Fever Rickettsiosis03^Tick paralysis12*Majority out-of-state exposures; 1-3 in-state-exposures annually**None tick-related^First locally-acquired confirmed case of R. rickettsii in ~20 years

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Low incidencePathogen prevalence in tick populations include:Borrelia burgdorferi s.s.B. miyamotoiAnaplasma phagocytophilumProbableFrancisella tularensisRickettsia rickettsii

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High incidencePathogen prevalence in tick populations include:Borrelia burgdorferi s.s.B. miyamotoiB. mayoniiAnaplasma phagocytophilumEhrlichia chaffeensisFrancisella tularensisRickettsia rickettsiaPowassan fever virus

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Liz DykstraHanna OlteanElizabeth SchiffmanDave Neitzel

Goals

Understand a model for coordination between epidemiology and vector surveillance programs for vector-borne disease

Learn techniques for vector surveillance planning including field site selection and rationale for short term and long term sampling sites

Discuss the use and possible applications of vector data for human disease prevention

Activities

Overview of surveillance activities, projects, and collaborations hosted by the MDH vector-borne disease group.

Met the team, reviewed tick surveillance activities, and briefed on the various studies used to understand tick vector ecology and infection rates.

Primary tick surveillance activities, Tick phenology study, surveillance for established populations of ticks in new areas of the state, Study aimed at identifying new tick-borne disease agents (the Advanced Molecular Detection project), Active surveillance effort to review charts for patients symptomatically consistent with Lyme disease, Prospective study of persons diagnosed with B. mayonii or B. miyamotoi,Societal impact assessment of Lyme disease.

Activities

Reviewed MDH collaborations with the state’s only MCD, the Metropolitan Mosquito Control District.

Project, supported by Upper Midwestern Center of Excellence in Vector-Borne Diseases at the University of Wisconsin – Madison, using Mosquito Magnet® traps to sample mosquitoes in areas not covered by the MMCD

Reviewed approaches to human disease surveillance. The MDH system different from WA as MN is a centralized state. Allows for standardization in case interviewing, data collection, and data entry.Visited tick surveillance sites.

Lessons Learned

Better understanding of:

Vector surveillance in a high vector-borne disease risk state,

Maintenance of vector data, Human vector-borne disease surveillance and prevention,Differences between centralized vs local control,Advantages to having everyone on team in same location as well as co-located (same building) with PH Lab and Agriculture dept.

Washington ZD/VBD vs Minnesota VBD - 2017

Epidemiologist

Molly Peterson, Hanna Oltean, Liz Dykstra, Dave

Neitzel

, Elizabeth Schiffman and Jenna Bjork

Liz Dykstra, PhD, BCE

Public Health Entomologist

360-236-3388

elizabeth.dykstra@doh.wa.govMore Information at:www.doh.wa.gov