In the phenoxyacetic acids, high activity was associated with substitution in the 3-, 4-, 2:4-, 2:5- and 3:4-positions and in general, chlorine had a greater effect than methyl in conferring activity. With the
Penicillin may not be appropriate for some infections, depending on which germs are causing the infection. Bacteria in some locations may have developed resistance to penicillin, which will make it not work as well. Penicillin may also be used for other conditions as determined by your healthcare...
chrysogenum) and having a powerful bacteriostatic effect against various chiefly gram-positive bacteria (as staphylococci, gonococci, pneumococci, hemolytic streptococci, or some meningococci) 2 : any of numerous often hygroscopic and unstable amido acids (as penicillin G, penicillin O, and ...
Penicillin may not be appropriate for some infections, depending on which germs are causing the infection. Bacteria in some locations may have developed resistance to penicillin, which will make it not work as well. Penicillin may also be used for other conditions as determined by your healthcare...
PROTEUS VULGARIS/effect of drugs onINVESTIGATION of the penicillin resistance of the secondary rods regenerated within the complete or incomplete L -cycle is of a great importance for understanding the biological significance of L forms of bacteria. So far, only a few authors have occupied ...
Gram-positivebacteria are calledprotoplastswhen they lose their cell wall.Gram-negativebacteria do not lose their cell wall completely and are calledspheroplastsafter treatment with penicillin. Penicillin shows a synergistic effect with aminoglycosides since the inhibition of peptidoglycan synthesis allows am...
Garrod's reminder that it is of the first importance to realize that penicillin acts only on certain bacteria, most of which are Gram-positive, the chief exceptions being the gonococcus and meningococcus; and that certain bacteria are highly resistant to it. On the other hand, it has, ...
Antibiotics have no effect on viruses, but it will kill off harmless and even the beneficial bacteria living in the patient's body. The surviving resistant bacteria, free from competition, will live and multiply and may eventually cause disease. Patients with bacterial infections, who don't ...
Penicillins can be classified into four major subgroups based on their structure and the spectrum of bacteria they destroy: natural penicillins, penicillinase-resistant penicillins, aminopenicillins, and extended-spectrum penicillins [4]. Penicillin–β-lactamase inhibitors are a combination drug of pe...
The meaning of PENICILLINASE is beta-lactamase; specifically : a beta-lactamase that hydrolyzes and inactivates penicillin.