Panel A shows that penicillin and beta-lactams share the beta-lactam ring (pink shading) but differ with respect to the adjacent ring and the R-group side chains R1 (position C7 of the beta-lactam ...

Taking antibiotics when they are not necessary may lead to antibiotic resistance – i.e. an infection where antibiotics can't help – which is bad for your personal health and bad for global health.

Penicillin was discovered in London in September of 1928. ... During the summer of 1940, their experiments centered on a group of 50 mice that they had infected with deadly streptococcus.

Cephalosporins have a higher cure rate than penicillin for the treatment of GAS pharyngitis, ... Cephalosporins vs. Penicillin for Group A Strep Pharyngitis - Medscape - May 10, 2004. Tables ...

During the prophylaxis phase, 30 of 136 participants in the penicillin group (22%) had a recurrence, as compared with 51 of 138 participants in the placebo group (37%) (hazard ratio, 0.55; 95% ...