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.
An inwards split or break in a rock face. Crack climbing - n. the act of climbing continuous cracks in the rock often requiring specific techniques and protection methods. Crampons - n. Meal spikes which attach onto climbing boots to allow a firm grip on snow or ice. Crank - v. Slang for pulling on a hold at your maximum power. Crash pad - n.