Tichus barbarellus

 is a highly infectious microscopic abnormal similar to that of the common Rabies virus.

Season 3
It is transmitted through communicable cross contamination including: saliva-blood, blood-saliva, blood-blood, saliva-saliva. There is no known cure to this viral infection.

A complete set of standard testing has not been done on this abnormal due to their miniature size. However, extensive environmental procedures have been performed.

Father Clark stole a shipment of cypher beetles and infected them with Tichus barbarellus. Clark's plan was to release a swarm of the beetles on a group of abnormals there by infecting them with Tichus barbarellus and causing them to go crazy which would incite anti-Abnormal sentiments in the local community. However, Dr. Will Zimmerman, Kate Freelander, and Bigfoot were able to stop him before he could succeed. Henry Foss was infected, but his body was able to fight off the infection.