Overview 1, 2, 3, 4, 5 Pertussis is a highly communicable, vaccine-preventable disease that affects the respiratory tract. The illness is caused by Bordetella pertussis (B. pertussis) bacteria, for which humans are the only known natural reservoir.verview 1, 2, 3, 4, 5 Pertussis is a highly communicable, vaccine-preventable disease that affects the respiratory tract. The illness is caused by Bordetella pertussis (B. pertussis) bacteria, for which humans are the only known natural reservoir.
Often, cramps. 1  a sudden, involuntary, spasmodic contraction of a muscle or group of muscles, especially of the extremities, sometimes with severe pain. 2  a piercing pain in the abdomen.
A muscle cramp is a sudden, involuntary contraction of one or more muscles. A swift contraction is a muscle spasm; a cramp occurs if the muscle continues to contract. Muscle cramps cause the muscle to harden in a way that you can often both see and feel.The treatment for a cramped muscle depends both on its location, and the duration of the cramp.et more electrolytes in your diet. Muscle cramps can be caused by a lack of electrolytes, which include the minerals potassium, magnesium and sodium. If you're experiencing muscle cramps, eat a potassium-rich banana or two.