Abstract
Lyme disease (LD), anaplasmosis, babesiosis and other tick-borne
diseases (TBDs) attributed to /Ixodes/ ticks are thought to be widely
underreported in the United States. To identify TBD cases diagnosed in
2009, but not reported to the Minnesota Department of Health (MDH),
diagnostic and procedural billing codes suggestive of tick-borne
diseases were used to select medical charts for retrospective review in
medical facilities serving residents of a highly endemic county in
Minnesota.
Of 444 illness events, 352 (79%) were not reported. Of these, 102 (29%)
met confirmed or probable surveillance case criteria, including 91 (26%)
confirmed LD cases with physician-diagnosed erythema migrans (EM). For
each confirmed and probable LD, probable anaplasmosis and confirmed
babesiosis case reported to MDH in 2009, 2.8, 1.3, 1.2 and 1.0 cases
were likely diagnosed, respectively.
These revised estimates provide a more accurate assessment and better
understanding of the burden of these diseases in a highly endemic county.
doi.org/10.1111/zph.1229179% of tick borne illnesses are NOT reported!!! And, this is just on ONE community! Imagine if they extrapolated that out to include all of the communities in the US, as those in the South or West are even more often misdiagnosed because these infections are not believed to be endemic there!!