"The total confirmed and probable cases in Pennsylvania for 2012 is 5,033...the numbers might not tell the story of how many cases are truly Lyme disease."
"We made a decision a few years ago not to confirm each case," he said, explaining the department takes the reports it receives from physicians about suspected cases.
"Lab results can sometimes cause confusion—one reason that the health department no longer confirms each case."
http://northallegheny.patch.com/groups/summer/p/are-north-allegheny-residents-at-risk-for-lyme-disease