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.
Pneumothorax occurs when air enters the space around your lungs, or the pleural space. Air can find its way into the pleural space when thereâs an open injury in your chest wall or a tear or rupture in your lung, disrupting the pressure that keeps your lungs inflated. Itâs known as a tension pneumothorax when the lung wall is affected, or an open pneumothorax when the chest wall is affected. Causes of ruptured or injured chest or lung walls can include lung disease, injury from a sport, or even changes in air pressure that you experience when scuba diving or mountain climbing. Sometimes, the cause of pneumothorax is unknown.