2022 Ehrlichia spp. Forecast

20220127 Capc Forecast Maps Display V1 Ehrlichiosis

Nationwide, the high prevalence areas for ehrlichiosis are less well-defined compared to other vector-borne pathogens. The maps represent multiples species of genus Ehrlichia that have differing geographical ranges. Nonetheless, prevalence is expected to be above normal for the majority of the United States with some interesting emerging risk areas.

  • The forecasted risks of Ehrlichia spp. in dogs remain high throughout the southwest, southcentral, and coastal Atlantic states.
  • We expect increasing numbers of seropositive dogs in central California, northern Idaho, and western Montana. Risks also continue in much of Colorado and many parts of Wyoming. Emerging new species of Ehrlichia have complicated the prevalence maps in parts of the Wisconsin and Minnesota and should emphasize the need for testing and prevention in these areas.

Considering the widespread prevalence of Ehrlichia spp. throughout much of the United States, the continued use of acaricides, routine examination of pets for the presence of ticks, and prompt removal remains imperative. Testing of symptomatic dogs can help monitor the prevalence of ehrlichiosis and will also help reinforce the use of available tick control products.

Year-round protection, annual testing

The best way to protect your patients is to advise owners of the importance of year-round prevention, even during the winter months. You can use the CAPC Parasite Prevalence Maps to support your recommendation by underscoring the risks in your area and in regions of the country your clients may travel with their pets. It is also critical to emphasize the importance of compliance and using products correctly.

CAPC Parasite Prevalence maps and Forecast maps are validated tools for increasing client willingness to engage in parasite prevention. Sign up to receive local alerts on parasite testing results down to the county level today by visiting the CAPC Parasite Prevalence Maps and selecting "Get Updates".

Monthly Pet Parasite Forecasts

Veterinary professionals and pet owners who want to monitor parasite activity in their county throughout the year, can also access 30-Day Parasite Forecast Maps at www.petdiseasealerts.org. These maps, developed exclusively by CAPC, provide a local forecast for every county in the continental United States on a monthly basis.

The Science Behind the Forecasts

Vector-borne disease is dynamic and ever changing, driven by multiple factors that affect the development of arthropod vectors and the pathogens they carry. Leading parasitologists work in collaboration with a team of statisticians to identify regions of the country that may experience higher parasite incidence in the months ahead. Numerous factors are analyzed, including the number of positive tests and the influence of weather patterns, vegetation indices, and human population density. Using this multi-disciplinary approach, we are leveraging everyone’s expertise to focus on a single common interest: forecasting the risk of exposure to vector-borne pathogens. While these forecasts predict the potential risk of a dog testing positive, they do not necessarily reflect the occurrence of clinical disease.

To learn more about the science behind the maps, full access to our manuscripts describing the methodology and fidelity of our forecasts can be found here.