- #74
It says it was poison, but it never said how quickly it would deteriorate the soul. Keep in mind she was dying, these quincies merely lost the bankai, a power that was stolen, so they instantly lost it. There is rather a big difference between losing a stolen power and not being hurt and actually dying.
She didn't even show any symptoms until the day after she was bitten and even then she was showing signs of a person undergoing the early stages of hollowfication, not corrosion. According to this weeks chapter that shouldn't have even been possible because the hollow's soul should have been eating away at hers rather then fusing with it.
After re-reading chp. 534 nothing about what was happening to her lines up with what they are saying now. Ryuken has no idea what's going on and was initially trying to hide the fact that she was bitten from the others. Katagiri says Misaki needs to be purified, not because she thought Misaki's life was in danger but because she was worried about "the quincy bloodline being tainted". And last but not least, Ryuken's mom's reaction to seeing Misaki's hollow hole and what looks to be a scar on her leg from a past hollow attack. His mom didn't seem to know much about the situation either even though she herself was wounded by a hollow.
None of the other quincies were concerned about the poisonous effects of hollow reiatsu that should have been destroying her. Rather they were more concerned with her giving birth to what i would assume would be a fullbringer and her transforming into a monster, which again according to this weeks chapter should not be possible.
I guess you can claim that White being an artificial hollow, for whatever reason, may not be poisonous to quincies like real hollows. HOWEVER, there is absolutely no reason why the Ishida clan would be ignorant to the fact that being exposed to hollow reiastu erases their very existence, especially sense they were one of the few remaining families to uphold all the past traditions.