Oh yes, but unlikely. The things is, there need to be spores around for the fungus to grow. Also, very humid conditions are needed. So it's unlikely to happen to any of our T's UNLESS you happen to handle Cordyrus in a Chinese Market. Oh yes. The Chinese eat it so if you're concerned about Cordyceps, be very careful in Chinese/Asian Markets
EDIT: Here's some more info
First of all, a Reddit Page:
www.reddit.com/r/WTF/comments/v2bpl/tara...cted_with_cordyceps/
Then some more pictures
Attachment tarantula_fungus.jpg not found
Attachment Cordyceps_on_Tarantula_2a.jpg not found
Attachment tumblr_m75yi6dxhF1r8vrhxo1_1280.jpg not found
Now, some of you may know Pokemon. In the pokemon world there is a pokemon called Paras. This is essentially based on Animals infected with Cordyceps
Attachment images.jpg not found
Ant Zombie
Attachment zombie-ants-2.jpg not found
Then a video
And finally another Website
www.shaggybevo.com/board/showthread.php/127547-Nightmare-Fuel
....
Hope you enjoy the subsequent nightmares