病原 びょうげん せい大腸 だいちょう きんじゃなかったです
byōgenseidaichōkinjanakattadesu

Noun
Desu Copula

The polite, past negative form of 病原性大腸菌

1. Wasn't virulent E. coli.; Wasn't pathogenic E. coli.

Past/Perfective
Negative
Polite
Casual Register