title: Contamination by hepatitis B surface antigen in dental surgeries.
mesh_terms: D003748:Dental Equipment; D003770:Dental Offices; D004197:Disease Reservoirs; D004783:Environmental Microbiology; D004866:Equipment Contamination; D006509:Hepatitis B / Q000635:transmission; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans
chemical_list: D006514:Hepatitis B Surface Antigens