something like this happened to me 2 yrs ago,i was handling live rock.i felt what can best be described as a minor bee sting,i looked at my finger and there was the smallest bit of blood..about an hour later my whole arm was sore and hurt quite a bit when moved in any direction,the whole time my bride insisting i go to e.r.about 3 hrs later when i could no longer stand the pain and the red line traveling up my arm rather quickly i went to the e.r.when entering i passed out on the floor!!!woke up to a doctor telling me i was lucky as something was poisoning my blood,i explained what i do (lfs owner)he said haaaa! and called another doctor,long story short is a few shots of some antibiotic,but what did the trick he told me was anihistamine,(if spelled right),cleared me up but i still bear a nasty scar on my finger because of this.