Tick Infection Rate By Region

Pathogen prevalence within tick populations — what percentage of ticks in each region and species actually carry each disease, and why those numbers vary so much between locations and years. This article assumes the reader already knows which ticks and diseases are present in their region (owned by `tick-risk-by-geography`); the question here is the narrower follow-up: of the ticks that *are* present, how often are they actually infected, and what does that mean for personal risk assessment.

This article is still in our research and editorial process and will be published soon. The shape of what it will cover is captured below.

Questions this article will answer

• What percentage of ticks carry Lyme disease, RMSF, or alpha-gal, and does it vary by region?
• What percentage of deer ticks in the Northeast carry Lyme disease?
• Does the tick infection rate vary within a state or county, not just by region?

While you wait — related published articles

• Tick Risk By Geography — owns the canonical answer to which tick species and diseases are present in each region and where to find local data, and is the indispensable upstream context for this article. The infection-rate question only makes sense once a reader knows which ticks are present in their area; this article assumes that frame and answers the narrower follow-up — of the ticks that *are* present, what percentage actually carry each pathogen, and why does that number vary so much between locations and years. Treat `tick-risk-by-geography` as the canonical reference for the where-are-they question and defer to it for any geographic-distribution claim.

Or browse the broader topic: Understanding Your Personal Risk