Hi WC
To me it sounds like you may have been bitten by a white-tailed spider, which as far as I know is the only dangerous animal in New Zealand.
The episode in Vienna may have been a recurrance of the initial bite ... or it may be completed unrelated.
Do a quick google on "white-tailed spider" and you can read a little about it.
Hope this helps ... but its only speculation of course.
Cheers