2022 Anaplasma spp. Forecast

20220127 Capc Forecast Maps Display V1 Anaplasmosis

The CAPC Prevalence and Forecast Maps represent actual and predicted exposure to both Anaplasma phagocytophilum and Anaplasma platys - infected ticks. The two pathogens are transmitted by different tick vectors (Ixodes spp. and Rhipicephalus sanguineus, respectively) with overlapping geographical ranges. The overlap in ranges prevents distinction between A. phagocytophilum and A. platys on the CAPC Prevalence and Forecast Maps. Prevention of both requires limiting exposure to tick habitats, routine use of acaricides, and regular tick checks of pets.

  • The seroprevalence of Anaplasma spp. in dogs continues to follow the expanding range of Ixodes scapularis. Major risks for dogs continue in the Northeast and upper Midwest. Veterinarians throughout these regions should reinforce the recommendations to their clients on the year-round use of tick preventives and encourage owners to check their dogs for ticks and remove them promptly. Annual testing can aid in assessing risk for dogs in hyper-endemic areas.
  • Focal areas of higher than average seroprevalence continue in portions of Virginia, West Virginia, and Texas. These areas and much of the surrounding regions have historically had a lower risk of exposure, so veterinarians and clients should remain particularly vigilant. As mentioned for Ehrlichia, the presence of more than one species of Anaplasma in some areas can create confusion, particularly in asymptomatic pets. Aggressive and compliant tick control can help eliminate some of the confusion.

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.