Bulging Disc Definition. Herniated Disc Video. A bulging disc is a condition in which the nucleus (inner portion) of a spinal disc remains contained within the annulus fibrosus (outer portion), unlike a herniated disc in which the nucleus leaks out of the disc.erniated Disc Video. A bulging disc is a condition in which the nucleus (inner portion) of a spinal disc remains contained within the annulus fibrosus (outer portion), unlike a herniated disc in which the nucleus leaks out of the disc.
The term broad-spectrum antibiotic refers to an antibiotic that acts against a wide range of disease-causing bacteria. A broad-spectrum antibiotic acts against both Gram-positive and Gram-negative bacteria, in contrast to a narrow-spectrum antibiotic, which is effective against specific families of bacteria. An example of a commonly used broad-spectrum antibiotic is ampicillin.
Penicillins What are Penicillins. Penicillins are a type of antibiotic derived from Penicillium fungi. Alexander Fleming discovered the first penicillin in 1928 (benzylpenicillin also called penicillin G). Since then, several other penicillins have been derived, and the original structure has been modified to create new penicillins with enhanced effectiveness against a broader range of bacteria.