Lyme disease is a global health epidemic that grows bigger each year. What’s worse is that Lyme is hardly the only serious tick-related disease to worry about now. At least five dangerous pathogens are circulating in deer ticks alone, which expand their range into new territories every year. At the same time, other tick species that can transmit different infections are showing up in ever bigger numbers. It’s a public health concern that’s hard for medical providers to keep up with.