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.
1 Ruptured air blisters. Small air blisters (blebs) can develop on the top of your lung. These blebs sometimes burst â allowing air to leak into the space that surrounds the lungs.  Mechanical ventilation. A severe type of pneumothorax can occur in people who need mechanical assistance to breathe.