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.
The presence of an excess fluid, air, or gas in the pleural cavity can interfere with our ability to breathe. 1  Among the conditions that adversely affect the pleural cavity: 2  Congestive heart failure (CHF) can cause pleural effusion due to the increased capillary pressure in the lungs.