濾過ろか性病せいびょう原体げんたいではありませんでした
rokaseibyōgentaidewārimasendeshita

Noun
Desu Copula

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

1. Was not a filterable pathogen.; Was not a filtered pathogen.

Past/Perfective
Negative
Polite
Formal Register