濾過ろか性病せいびょう原体げんたいじゃなかったです
rokaseibyōgentaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 濾過性病原体

1. Wasn't filtering pathogens.; Didn't filter pathogens.

Past/Perfective
Negative
Polite
Casual Register