It has acquired extra virulence factors making it pathogenic.
It gains access to deep tissues via trauma, surgery, an IV line, etc.
It infects an immunocompromised patient.
Not all people infected by a bacteria may develop disease-subclinical infection is usually more common than clinically obvious infection.
Despite such limitations, Koch’s postulates are still a useful benchmark in judging whether there is a cause-and-effect relationship between a bacteria (or any other type of microorganism) and a clinical disease.
- Postural hypotension
from sitting to standing or from lying down to sitting or standing. Postural hypotension is more common in older people. The change in position causes a temporary reduction in blood flow and therefore a shortage of oxygen to the brain. This leads to lightheadedness and, sometimes, a “black out” episode, a loss of consciousness. Tilt-table […]
from sitting to standing or from lying down to sitting or standing. The root of the word “posture” is the Latin verb “ponere” meaning “to put or place.” The past participle “positus” gave the noun “positura” that travelled via France to England in the 16th century as “posture.”
The major positive ion (cation) found inside cells. The chemical notation for potassium is K+. The proper level of potassium is essential for normal cell function. An abnormal increase in potassium (hyperkalemia) or decrease in potassium (hypokalemia) can profoundly affect the nervous system and heart, and when extreme, can be fatal. The normal blood potassium […]
- Potassium deficiency
Hypokalemia and Potassium balance.
- Potassium excess
Hyperkalemia and Potassium balance.