Pox

Pox: [minor] by Iczer

'What's a matter, It was just a little scratch'

The character can infect others with a parasitic organism that quickly infects others. The character must hit with a bite attack (1D4) or claw swipe (2D4) to infect a target, who must make a saving throw vs lethal toxin.
If infected, the target grows thick purple pustules across the wound that race as far as possible across the body. The pustules ooze and itch terribly, the target loses one attack per round -2 to all combat skills and -10% to skill performance. The infection lasts for 1D4 melee rounds BUT it attempts to reinfect as soon as possible. At the duration's end, the target makes a new saving throw and takes 2D6 damage. If the saving throw fails, he remians infected for another 1D4 rounds. worse, any extended contact cause the infection to spread to the toucher, forcing them to make a saving throw.