ANTIBIOTIC SUSCEPTIBILITY TESTING. Bacteria demonstrate two kinds of resistance to antibiotics, namely intrinsic resistance and acquired resistance. Intrinsic resistance means that the species was resistant to an antibiotic even before its introduction.
Radioactive contamination and radiation exposure could occur if radioactive materials are released into the environment as the result of an accident, an event in nature, or an act of terrorism. Such a release could expose people and contaminate their surroundings and personal property.
ionizing radiation. Ionizing radiation may take the form of alpha particles, beta particles, or gamma rays. Ionizing radiation is of concern because it may cause adverse health effects. The process of emitting the radiation is called radioactive decay.