Pestiferous in British English
ADJECTIVE
informal
breeding, carrying, or spreading infectious disease
pestiferously (pesˈtiferously)
ADVERB
pestiferousness (pesˈtiferousness)
from Latin pestifer, from pestis contagious disease, pest + ferre to bring
https://gogreenpestcontrol.ca/pestiferous-2022/
https://www.linkedin.com/pulse/pestiferous-2022-randy-bilesky/?published=t