It was probably mold release which can be anything slippery including silicone, latex and Teflon.
I will relay your much-appreciated information to her parents; I had no idea that silicone and Teflon could also be a culprit in anaphylaxis. I will also make darn sure that I do not come in contact with the other named elements, don’t want another reaction either.
Thank you so much and God bless you!