Ok, I confess...it was ME!!
I poured the entire packet into a bowl and lovingly removed any ants one by one. I figured they had not breached the chocolate/shell barrier and those crispy coatings are so smooth that any germs would slide right off those suckers. Then I placed some in a jar and ate some.
I appear to be well, although maybe my slew of nightmares last night was brought on by the hallucinogenic effect of micro poo?
The lesson here appears to be well and truly to eat them all in one go - although I should remind you all it was a FAMILY PACK!
Thank you all for your advice and your brilliant comments...