The genome of the organism that produces the world's most lethal toxin has been revealed. This toxin is the major weapon in the genome of Clostridium botulinum: less than two kg is enough to kill every person on the planet.
pneumothorax. entry of air into the pleural cavity in sufficient quantity to cause collapse of the lung and consequent respiratory embarrassment. If it is unilateral there is a mediastinal shift with displacement of the heart to the other side of the chest. Breath sounds are absent from the affected side. Pneumothorax.
Air takes up space, restricting lung expansion. Partial or complete collapse of the affected lung. Spontaneous: an air-filled blister on the lung ruptures. Traumatic: air enters through chest injuries. Tension: air enters pleural cavity through the wound on inhalation but cannot leave on exhalation. Open: air enters pleural cavity through the wound on inhalation and leaves on exhalation.