I wouldn't think so Ambah but I wouldn't be sure either way.

The risk of listeria is low even in high risk foods. But it is still a risk and I believe (but I am a cautious health professional!) it's a risk that you can easily avoid for a few months of life!

I would think that the risk in a jar of pasta sauce would be teeny if at all. But again, that's not something I know it's something that I think... I sound very evasive don't I?