Wild Filly, if the discussion causes you too much pain…then don’t have it. The risk of transmission is so very low because not only would you have to be bleeding but the other person would have to have some point of entry. There are just so few scenarios that that seems likely as to make me think that you shouldn’t do anything that causes you so much stress. I’m not saying it’s not possible…but the chances are rather remote.
Every injury should be treated as if there is the potential for infection …perhaps you can suggest to the barn manager (and organize and set up) some safety/basic first aid “winter horsemanship” meetings that would cover that sort of education? Many high schools and colleges now have community service requirements for graduation…contact the local community college that offers EMT classes and see if someone will give a talk to your barn mates on basic first aid. Not only will it help educate EVERYONE on proper wound/emergency care, but the knowledge is just as applicable to horses as it is to humans, so it should be of interest to all.
Buy latex gloves and leave them in the lounge, by the ring, and in the barn’s first aid kit. If they are readily available, people WILL use them. (Of course, they’ll much more likely to get used up for sheath cleaning than anything related to you…but that’s to be expected! )
I used to be an EMT and we’re all trained in universal precautions and searching for medic alert tags and bracelets is part of that procedure. You should get one for emergency personnel (and they can be made to read how ever you want them). Other than that, I don’t see why those at the barn need to know unless you want to tell them. From my limited understanding of your illness (family member) an important part of your care is to minimize stress so your body is most efficient at fighting the disease. Since the telling is going to cause you so much unneeded stress, I’d vote that you don’t do it until you feel comfortable. Take precautions, carry your first aid kit, get a medic alert tag, carry your cell phone on your person at all time, but don’t add extra stress to your immune system by potentially making one of your refuges (the barn) an uncomfortable place. Keep the barn your place of comfort and serenity…hugs to you.