pestiferous - adjective

• contaminated with infecting organisms
• likely to spread and cause an epidemic disease
• tending to corrupt or pervert
• causing irritation or annoyance

pestiferous - thesaurus

annoying   bothersome   corruptive   dirty   galling   irritating   nettlesome   perversive   pesky   pestering   pestilent   pestilential   plaguey   plaguy   teasing   vexatious   vexing