Well we have a winner! Congratulations to Dr Jim who correctly deduced the bug to be Leptospira sp. In fact the EM is Leptosprira interrogans strain RGA. This strain was originally isolated in 1915 by Uhlenhuth and Fromme from the blood of a soldier in Belgium.
I've now segued into the next grant for 1st August (currently there is an unseemly rush by many US-based scientists to jump on the lucrative bidefence program before it closes on 2nd August). This will be a vaccine for yet another bacterial pathogen. This time a bit less obscure than Leptospira. I'll post another competition next week.