The Zoonotic and Vector-borne Disease program focuses on diseases in Washington state that can be transmitted from animals and bugs to people. We work with partners using a One Health approach to prevent and control these diseases.
Lowering the risk to our health depends on:
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Monitoring the pathogens that cause these diseases, including where they are and how they are changing over time
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Understanding environmental conditions and how they impact animals, bugs, and the pathogens they carry
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Understanding the distribution of vector and wildlife populations
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Understanding how and when humans are interacting with animals or bugs
Climate changes affect each of these factors, so ongoing disease monitoring is necessary.
What we do
The Zoonotic and Vector-borne Disease program works to lower disease risk and respond to public health events involving zoonotic, vector-borne, or environmental pathogens. We partner with federal, tribal, state, and local health departments. Our program:
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Collects data about zoonotic and vector-borne diseases in Washington and interprets what we find
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Responds to outbreaks of zoonotic and vector-borne diseases
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Prevents zoonotic and vector-borne diseases in humans and animals by educating the public and taking actions that reduce or eliminate the risk of disease
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Collaborates with many external partners on disease surveillance, which helps us understand what diseases exist in animal reservoirs, vectors, and the environment
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Improves our state’s public health systems to prevent and control zoonotic and vector-borne diseases
Data
- Zoonotic and Vector-borne Disease Dashboard
- Real-time rabies monitoring data
- Real-time West Nile virus monitoring data
- Tick data dashboard
- Annual Communicable Disease Reports
- Washington Tracking Network - Zoonotic Disease - Data showing the amount of zoonotic disease, such as West Nile virus in our state.
Resources
- Animal Transmitted Diseases - Zoonotic disease topics like rabies, hantavirus, West Nile virus, and tick-borne diseases.
- Notifiable condition reporting forms and guidelines
- One Health - Promotes multi-sectoral and cross-disciplinary collaboration to solve health challenges.
- Pests - Controlling pests such as rodents, bed bugs, mosquitoes, and ticks.
- Veterinarian Resources - Resources to help veterinarians to control zoonotic diseases.
- Zoonotic Disease Data and Reports - West Nile virus, plague, and reports.
- Zoonotic Disease Rules and Guidelines - Rabies vaccination requirement for pets, animal vendor and venue operator requirements, and other rules and guidelines.
Publications and partnerships
- Cryptococcus gatti
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- Galanis E, MacDougall L, Rose C, Chen SSA, Oltean HN, Cieslak P, DeBess E, Chong M, Sorrell TC, Baddley JW, Hoang LMN, Lockhart SR, Pappas PG, Phillips P. “Predictors of Cryptococcis gattii clinical presentation and outcome: An international study.” CID 80(5):1088-1094, Jan 2025
- Cryptococcus gattii in the United States: genotypic diversity of human and veterinary isolates (National Center for Biotechnology Information - NCBI)
- Whole genome sequence analysis of Cryptococcus gattii from the Pacific Northwest reveals unexpected diversity (NCBI)
- Treatment and outcomes among patients with Cryptococcus gattii infections in the United States Pacific Northwest (NCBI)
- MSG07: An International Cohort Study Comparing Epidemiology and Outcomes of Patients with Cryptococcus neoformans or Cryptococcus gattii Infections (NCBI)
- Dating the Cryptococcus gattii Dispersal to the North American Pacific Northwest (NCBI)
- Emergence of Cryptococcus gattii --- Pacific Northwest, 2004--2010 (CDC)
- Zoonotic Enteric Diseases
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- Notes from the Field: Outbreak of Multidrug-Resistant Salmonella Infections Linked to Pork — Washington, 2015 (Center for Disease Control - CDC)
- Strength of the association between antibiotic use and hemolytic uremic syndrome following Escherichia coli O157:H7 infection varies with case definition (NCBI)
- Importance of case age in the purported association between phylogenetics and hemolytic uremic syndrome in Escherichia coli O157:H7 infections (NCBI)
- High-Resolution Comparative Genomics of Salmonella Kentucky Aids Source Tracing and Detection of ST198 and ST152 Lineage-Specific Mutations (Frontiers in Sustainable Food Systems)
- Contribution and Interaction of Shiga Toxin Genes to Escherichia coli O157:H7 Virulence (NCBI)
- Case definitions of hemolytic uremic syndrome following Escherichia coli O157:H7 infection vary in validity (NCBI)
- An outbreak of Escherichia coli O157:H7 infections following a dairy education school field trip in Washington state, 2015 (NCBI)
- Geogenomic Segregation and Temporal Trends of Human Pathogenic Escherichia coli O157:H7, Washington, USA, 2005–20141 (NCBI)
- Rabies
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- Paris K, Hamlet A, Lipton B, Oltean HN. “Evaluation of Surveillance for Suspected Human Exposure to Rabies, Washington State, USA, 2018-2023.” E-pub ahead of print, Public Health Reports, October 2025
- Bat rabies in Washington State: Temporal-spatial trends and risk factors for zoonotic transmission (2000–2017) (Public Library of Science ONE - PLOS ONE)
- Tickborne Diseases
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- Eisen RJ, Foster E, Kjemtrup A, Saunders MEM, Brown J, Green L, Cervantes K, Prusinski M, White J, Barbarin AM, Williams C, Kwit N, Bernick J, Gaines D, Dykstra E, Oltean HN, Dotseth E, Lee X, Osborn R. “Perspectives from federal and state health departments on their participation in and the utility of Ixodes scapularis (Acari:Ixodidae) and Ixodes pacificus tick and tick-borne pathogen surveillance in the United States.” Journal of Medical Entomology 62(2):289-300. Mar 2025
- Soft Tick Relapsing Fever — United States, 2012–2021
- Epidemiology of Lyme disease in low-incidence states (Science Direct)
- Tickborne Relapsing Fever — United States, 1990–2011 (NCBI)
- Ecology and Epidemiology of Tickborne Pathogens, Washington, USA, 2011–2016 (NCBI)
- Rickettsia and Anaplasma species in Dermacentor andersoni ticks from Washington (NCBI)
- Multistate Survey of American Dog Ticks (Dermacentor variabilis) for Rickettsia Species (NCBI)
- Human-Biting Ixodes Ticks and Pathogen Prevalence from California, Oregon, and Washington (NCBI)
- Valley Fever/Coccidioidomycosis
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- Williams S, Benedict K, Jacksin BR, Rajeev M, Cooksey G, Ruberto I, Williamson T, Sunenshine RH, Osborn B, Oltean HN, Reik RR, Freedman MS, Spec A, Carey A, Schwartz IS, Medina-Garcia L, Bahr NC, Kuran R, Heidari A, Thompson GR, Johnson R, Galgiani JN, Chiller T, Toda M. “Estimated burden of Coccidioidomycosis in the United States – 2019.” JAMA Netw Open 8(6):e2513572, June 2025
- Surveillance for Coccidioidomycosis, Histoplasmosis, and Blastomycosis During the COVID-19 Pandemic — United States, 2019–2021
- Coccidioidomycosis Acquired in Washington State (Oxford University Press - OUP)
- Coccidioides immitis Identified in Soil Outside of Its Known Range — Washington, 2013 (NCBI)
- Valley Fever: Finding New Places for an Old Disease: Coccidioides immitis Found in Washington State Soil Associated With Recent Human Infection (NCBI)
- Utility of Whole-Genome Sequencing to Ascertain Locally Acquired Cases of Coccidioidomycosis, Washington, USA (NCBI)
- Update on the Epidemiology of coccidioidomycosis in the United States (OUP)
- A survey of veterinarians’ knowledge, attitudes and practices regarding an emerging disease: Coccidioidomycosis in Washington State (Wiley Online Library)
- Notes from the Field: Multistate Coccidioidomycosis Outbreak in U.S. Residents Returning from Community Service Trips to Baja California, Mexico — July–August 2018 (CDC)
- Suspected Locally Acquired Coccidioidomycosis in Human, Spokane, Washington, USA (NCBI)
- Knowledge, attitudes, and practices regarding coccidioidomycosis among healthcare providers in four counties in Washington State, 2017 (OUP)
- Factors Influencing Distribution of Coccidioidoides immitis in Soil, Washington State, 2016 (American Society for Microbiology - ASM)
- Q Fever
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- First reported multistate human Q fever outbreak in the United States, 2011 (NCBI)
- Presence and persistence of Coxiella burnetii in the environments of goat farms associated with a Q fever outbreak (NCBI)
- Epizootiological investigation of a Q fever outbreak and implications for future control strategies (NCBI)
- West Nile Virus
- Avian Flu
- Other
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- Oltean HN*, Butler WK*, Dykstra EA, Saunders E, Salzer JS, Commins SP. “Onset of alpha-gal syndrome following tick bite in Washington State.” EID 31(4):829-32, Apr 2025.
- Oltean HN, Lipton B, Black A, Snekvik K, Haman K, Buswell M, Baines AE, Rabinowitz PM, Russell SL, Shadomy S, Ghai RR, Rekant S, Lindquist S, Baseman J. “Developing a One Health data integration framework focused on real-time pathogen surveillance and applied genomic epidemiology.” One Health Outlook 7(9), Feb 2025.
- Inouye W, Oltean HN, McMillan M, Schnitzler H, Lipton B, Peterson JM, Dietrich EA, Respicio-Kingry L, Morrow G. “Tularemia associated with harbor seal necropsy – Kitsap County, Washington, October 2023.” MMWR 73(33):731-2. Aug 2024
- Application of environmental sampling to investigate a case of avian chlamydiosis in a pet store and breeding facility leading to mass bird exposures
- Baylisascaris procyonis Roundworm Infection in Child with Autism Spectrum Disorder, Washington, USA, 2022
- Francisella tularensis Bone and Joint Infections: United States, 2004-2023
- Fatal Infection Associated with Equine Exposure — King County, Washington, 2016 (CDC)
- Fly Reservoir Associated with Wohlfahrtiimonas Bacteremia in a Human (NCBI)
- Notes from the Field: Baylisascaris procyonis Encephalomyelitis in a Toddler — King County, Washington, 2017(CDC)
Contact us
Local Health Jurisdictions in Washington State can request technical assistance:
- Email the Zoonotic program for more information (zd@doh.wa.gov).
- 206-418-5500: Phone (24-hour contact)
- 206-364-1060: Secure FAX
- 1-877-539-4344: 24-hour contact (inside Washington State only)
Washington residents or healthcare providers should contact their local health jurisdictions for assistance.