pestiferous

adjectives

contaminated with infecting organisms
"dirty wounds"; "obliged to go into infected rooms"- Jane Austen
dirty, pestiferous
likely to spread and cause an epidemic disease
"a pestilential malignancy in the air"- Jonathan Swift; "plaguey fevers"
pestiferous, pestilent, pestilential, plaguey
tending to corrupt or pervert
corruptive, perversive, pestiferous
causing irritation or annoyance
"tapping an annoying rhythm on his glass with his fork"; "aircraft noise is particularly bothersome near the airport"; "found it galling to have to ask permission"; "an irritating delay"; "nettlesome paperwork"; "a pesky mosquito"; "swarms of pestering gnats"; "a plaguey newfangled safety catch"; "a teasing and persistent thought annoyed him"; "a vexatious child"; "it is vexing to have to admit you are wrong"
annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, pestiferous, plaguey, plaguy, teasing, vexatious, vexing