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.
accumulation of air or gas in the pleural cavity, resulting in collapse of the lung on the affected side. The condition may occur spontaneously (spontaneous pneumothorax), as in the course of a pulmonary disease, or it may follow perforating trauma to the chest wall or lung parenchyma (traumatic or open pneumothorax).