Campylobacter 'n' other species

Campylobacter in 42C candle jar do grow much better than in 37C CO2 incubater. I'm not sure which facter matters the most; but anyway, things seem to be getting better. On the other hand, Kerry said Medlab told her that they couldn't identify what species the Campylobacter and Yersinia they're going to send me. That is, I'll have to identify what species they are. Mm...any good methods to identify Campylobacter jejuni, C. coli, C. fetus and Yersinia enterocolitica? Biochemical methods may be a way to go, as long as everything can go smooth if following Bergey's Manual of Determinative Bacteriology (the differentiation criteria look quite complicating though)