in·fes·ta·tion
noun/ˌɪnfeˈsteɪʃn/
/ˌɪnfeˈsteɪʃn/
[countable, uncountable]- a large number of insects, rats, etc. living in a place where they are not wanted, often causing damage or disease
侵染：大量昆虫，大鼠等生活在不需要的地方，经常造成破坏或疾病 - an infestation of lice
长满虱子 - Scientists are checking for both insect and fungal infestation.
科学家正在检查昆虫和真菌感染。
- an infestation of lice