Here's what you do for an insect, spider, or snake bite.... or even poison ivy 
etc.

Get a 6 Volt battery, connect the leads via wire to sponges that have been 
mostened.  Place the sponges on both sides of the bite for 30-60 seconds or 
longer so that this mild level of electricity runs through the bite spot.  

This will send trillions of electrons through the afflicted area and this 
changes the proteins causing the reaction to a form that does not cause a 
reaction.  Problem solved.... in seconds.

For more info, there are online discussions and yahoo groups such as 
micro-electricity germ-killer.    These sites have some cautions.... such as a 
prohibition against putting a lead in an open sore or abrasion, and also 
against the dangers of using more than 6 volts.

Best of luck.