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Fig. 5a Adult Dermacentor, unengorged.
Dale Tilly.
Click the thumbnail to see enlarged picture. |
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Fig. 5b Adult Ixodes pacificus, partially
engorged. Dale Tilly.
Cick on the thumbnail to see enlarged photo. |
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National Epidemiology
Lyme disease is the most common
vectorborne disease in the United
States. According to the Centers for Disease Control and Prevention
(CDC), in 1996 there were 16,461 cases reported in the United States. The
majority of cases have occurred in
four endemic regions: the northeast,
the mid-Atlantic, Minnesota/Wisconsin and California/Oregon.
Most cases occur between May and
August, the most active feeding
period of the nymphal Ixodes ticks.
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