Previously on Patient Zero.

Muscle aches, crushing throbbing headaches, giant bullseye, rash.

I'm not an inemologist.

I knew nothing about ticks and it started as an investigation of

children with arthritis. Yes.

Is that the tick right there?

Yep, the big nasty looking thing, yeah.

Wow. So this is ambrium that I'm showing you right now the

female she's about the size of maybe like a green grape this is Colleen Evans

who until recently was the figurative k cryptkeeper for one of the world's strangest zoological attractions.

One composed entirely of dead parasites.

So I am Colleen Evans. I am the collections manager for the U.S National Ticket Collection.

And right now she's talking to Lucky College student Mary Montgomery, who we hired to tour the collection

with a microphone.

But she would have been about the same size as a male when she started feeding.

He's about the size of like a pencil.

She's showing her a big fat bloodsucker, a species of tick that feeds exclusively on Central American

sloths.

Any animal really you could think of, there's probably a tick that feeds on it.

Mammals, sure that you probably knew, but did you know ticks feed on birds?

Ticks from penguins, and puffinsins all kinds of animals. They feed on

reptiles. There's even a species that has evolved to survive underwater by

...