Contamination by reinserting needles into the same vial and using rusty instruments in a patient's mouth. >> the instrument that is came out were horrible. i wouldn't let me nephews play with them in the dirt. they were horrible. they had rust on them. >> the conditions so questionable patients need to be tested now and on saturday here at the tulsa health department free screenings will begin for hepatitis b, c, and hiv. >> as many persons who may be infected with these blood born viruses may be infected for years without experiencing any signs of illness. >> a scary possibility. dr. harringt...