You have been dry bitten ( no envenomation) if none of the following are experienced ( remember that psychosomatic reactions can initiate some of these symptoms) ; swelling,pain,nausea,vomiting,sweating,chills,dizziness,weakness,numbness,tingling of the mouth and/or tonque,swollen eyelids,blurred vision,muscle spasms,rapid change in heart rate/blood pressure,increased thirst,weakness and a real giveaway- unconsciousness <img src="images/graemlins/tongue.gif" alt="" /> Even dry bites are a serious affair requiring medical attention due to infection. In my case it was a tetanus booster and aggressive wound hygiene. The first time I was conducting a surface survey for archaeological artifacts. My brain was coded to observe Dentalium shell beads,chert scrapers and bone awls. The second time was on a dirt road in the sunlight and I was focused on a pretty coed. These animals are superb at camouflage ( and making you feel stupid <img src="images/graemlins/grin.gif" alt="" />.) Both times I did experience pain from the actual bite. I now carry the Sawyer unit. An excellent website is
http://www.xmission.com/~gastown/herpmed/snbite.htm After my encounters, I was loaned a massive 2 volume Tome about rattlesnakes by my Biology Proff. They are fascinating creatures. As an aside, they are also evolving, or being selectively bred by those who would destroy them! Rattlesnake roundups have wiped out all but those who are less inclined to rattle. We are breeding silent rattlesnakes <img src="images/graemlins/blush.gif" alt="" />