Interesting. I don't think a worm would have made it through the processing heat and pressure, so maybe it got dusted into the blend from some green tobacco. Now that you've inspected the rest of the blend, I think it's okay to smoke. We eat critters, alive and not, all the time. It's good to avoid 'em, but some contact is inevitable. The insane extreme on this is the exterminator services that promise to eliminate bugs (i.e. everything living) in your yard. If people are that neurotic about ecology, they should live in the desert. Farm kids have the natural advantage of having grown up in active ecologies; they accept bugs/spiders/salamanders etc. as part of the deal. In life. In general, their immunities are wide and their allergies are much fewer. As spoken by an admiring suburban kid.