First you have to know which compound of the venom are the active ingredient (a venom is not a single molecule, it's a big mix of lots of substances).
Maybe the important part are just small peptide (works also for small nucleic acid strands). In this case, yes: just slap the gene inside a bacteria or yeast and just harvest the thing in a huge brewery tank. This will cost a tiny fraction of the current method. (as in "a few bucks for a dozen of kilograms"). Washing industry thrives on this kind of process and has already made it fucking incredibly cheap (do you really think that the digestive enzyme in your washing powder where harvested from actual animals ?)
But maybe not. Maybe it can be a complex protein that requires some post processing (chaperone helping to fold it into an unusual shape, enzyme modifying some parts) - (but very unlikely. If the venom can cross the skin without injection, it needs to be something small). Or maybe it can be a small chemical molecule that is produced by a long and complex chain of chemical reaction necessitating a big collection of enzymes (very likely, given that it can easily cross the skin).
In this case you need to identify the candidate, understand the process that produce it (not impossible but it takes time), and then either put the whole machinery inside yeast (bacteria post-process a lot less their proteins) and go for the brewery-tank method, or replicate the synthesis in another way (produce the protein in bacteria and then do the modification in a lab. Or find a way to synthetise the small chemical compound by using a sequence of chemical reactions in a lab) and scale it up to industrial scale.
This *WILL* end up being incredibly cheap in the long term, but requires much more research and development.
There's a whole branch of science to study that, called "Venomics".
Until then, you're stuck at putting bee on a micro electric chair until they are so pissed of that they start stinging the glass.
(And I'm betting that perhaps, all the benefit come from the few traces of adrenalin-like substance that the bee end-up secreting after going through such predicament and of which a small part might end up in the venom itself).
But the fact that they extract only a gram from a whole hive, means that they are probably concentrating/extracting the product already, so they know already a few tips in which direction to look to find the interresting part.
Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/SSEZpFDIiPU/story01.htm
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