Some of the secondary reasons to perform testing include: to screen for hepatitis B infection in at-risk populations or in blood donors, to determine if someone is a carrier, to detect previous infection (with subsequent immunity), and to determine if immunity has developed due to vaccination.
Abdominal muscle spasm, also known as abdominal rigidity, is a powerful, involuntary contraction of the muscles of the abdomen.During a spasm, the muscle will feel stiff and tender if you apply pressure.ike any other muscles in the body, your abdominal muscles can have spasms that occur as a result of muscle strain during heavy use or overuse, fatigue, dehydration, and alcohol or drug use.
Answer: Muscle spasm results from inflammation that occurs when a muscle is overstretched or torn. It begins as a muscle strain, which doesn't sound like a serious injury, but it can cause severe low back pain. Many people go to the emergency room each year because of a muscle strain.In fact, most episodes of acute lower back pain are caused by damage to the muscles and/or ligaments in the low back.any people go to the emergency room each year because of a muscle strain. In fact, most episodes of acute lower back pain are caused by damage to the muscles and/or ligaments in the low back.