Ian Fuller does not advocate bloodworms as any sort of basic food for cories, so I would avoid them except as once a week treats. If memory serves me, Neale Monks had something to say about not feeding these much as well. Their nutritive value is far less than any quality prepared/dry food like bug bites and shrimp pellets and these are certainly easier to feed--and much, much healthier.
I share the allergy to bloodworms. When I did feed them once weekly, I had to be very careful not to allow my hands to come into contact or I got a terrible rash (the frozen cubes pushed into a dish of warm water solved this). I had to hold the dish away so I could not smell them, or I choked up terrible with very itchy watery eyes.
