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.
Tension pneumothorax: The most serious type of pneumothorax, this occurs when the pressure in the pleural space is greater than the atmospheric pressure, either because air becomes trapped in the pleural space or because the entering air is from a positive-pressure mechanical ventilator.
Pleura refers to the cavity that surrounds and protects the human lungs. Pneumonia may cause the two membranes that make up the pleural cavity to rub together.Physicians examinine chest radiographs before to determine if a patient's pleura has been compromised. View slideshow of images above.he pleural cavity is the cavity that surrounds human lungs. It is made up of two membranes that are separated by fluid called pleurae.