It is a greenish gas which infects almost instantly on contact. The spores seem to only attack Crypto, but can be destroyed by a single zap with the Zap-O-Matic or a few shots with the Disintegrator. They tried to infect several countries with barrels full of spores but Crypto foiled them every time. The Blisk planned to launch a missile filled of spores at the Earth which Crypto stopped. They can be easily drawn out of their hosts without killing the host via the Anal Probe. If an infected human is killed, the spore will be ejected and float around aimlessly until it is destroyed or until it infects another human.