がこうそうきんだったら
鵞口瘡菌だったら
gakōsōkindattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of がこうそうきん

1. If it were aphtous stomatitis.; If it's aphtous stomatitis.

Tara Conditional
Usually Written in Kana