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.
There is no clear cause for a spontaneous pneumothorax. It may occur when an air pocket in the lung breaks open. This allows air to leak out and become trapped in the pleural space. Air may also enter the pleural space if your lung tissue is damaged.