How many cases of Lyme Disease are reported each year in the US?

According to the Centers for Disease Control and Prevention (CDC) there were 28,921 confirmed cases of Lyme Disease in the United States in 2008. This was a 5% increase on 2007.

Please note that 2008 was the last year the CDC provided data for as of February, 2010 however the related links should be checked for updated information.