streptococci

Penicillin V Potassium (Phenoxymethylpenicillin potassium salt) is an orally administered, broad-spectrum penicillin antibiotic used for treating mild to moderate infections caused by susceptible gram-positive organisms.

Mupirocin (BRL-4910A) is a RNA synthetase inhibitor antibacterial. It has shown excellent activity against gram-positive staphylococci and streptococci.

Mupirocin calcium hydrate is an antibiotic produced by Pseudomonas fluorescens, showed a high level of activity against staphylococci and streptococci and against certain gram-negative bacteria

Marcellomycin is a glycoside and quinone antibiotic. It exhibits activity against Gram-positive bacteria, with particularly strong efficacy against streptococci.

Diphenicillin (Ancillin (free acid); 2-Biphenylyl penicillin (free acid); SKF-12141 (free acid)) is a penicillin that resists Penicillinase and exhibits antibacterial activity. It shows effective activity against Gram-positive cocci. Diphenicillin is promising for research on infectious diseases caused by Gram-positive bacteria such as staphylococci, pneumococci, and group A streptococci.

Citreamicin alpha (LL-E 19085-alpha) is an antibiotic that has been evaluated for its in vitro antibacterial activity against 429 clinical isolates of Gram-positive cocci using the agar dilution method. This study included 313 strains of staphylococci and 116 strains of streptococci. Its in vitro efficacy was compared with ampicillin, amoxicillin, cephalothin, erythromycin, and vancomycin. For staphylococci, Citreamicin alpha demonstrated MIC values ranging from 0.12 to 4.0 μg/ml, and for Streptococcus pyogenes, the MIC values ranged from 0.03 to 0.12 μg/ml. Conversely, enterococci presented relative resistance, requiring 2.0 μg/ml to inhibit 64% of 62 tested strains. The antibiotic's in vitro efficacy significantly surpassed that of ampicillin, amoxicillin, cephalothin, and erythromycin, while it was comparable to or slightly less effective than vancomycin.