i have figured out a way to get live yoghurt culture across the borders.

just need to have some of it kept in a live state, sealed up, taped to my body somewhere. that would keep it alive, and also prevent it from being exposed to x-ray radiation.

to recover said organism, i just need to be very clean at first in raising a small amount of seed culture with a small, very carefully cleaned fermentation vessel, and once i have a couple hundred ml of active cultured yoghurt i can keep it going indefinitely.

the lactobacillus/acidophilus combo found in native bulgarian yoghurt is special, and has made its way across the world already to many parts, but a) i don't trust commercial entities to actually deliver me the for real bulgaricus and b) i have not seen any food product label containing live yoghurt culture specify it contains bulgaricus.