β-lactam ring. Molecular weights of the various penicillinases tend to cluster near 50 kilodaltons. Penicillinase was the first β-lactamase to be identified...

penicillin-binding proteins (PBPs). Methicillin is actually a penicillinase-resistant β-lactam antibiotic. Penicillinase is a bacterial enzyme produced by bacteria resistant...

caused by susceptible isolates of Neisseria gonorrhoeae (penicillinase-and non-penicillinase-producing isolates). Skin and soft tissue infection: effective...

similar in effect to cloxacillin and dicloxacillin, being active against penicillinase forming bacteria. Flucloxacillin was patented in 1961. It is not commonly...

survive penicillin exposure by producing penicillinases, enzymes that degrade penicillin.[citation needed] Penicillinase production is one mechanism by which...

anaerobe 1 Cefalexin cephalexin Keflex H V Gram-positive: Activity against penicillinase-producing, methicillin-susceptible staphylococci and streptococci (though...

also be used. Some patients may benefit from systemic narrow-spectrum penicillinase-resistant penicillins (such as dicloxacillin in the US or flucloxacillin...

being broken down by staphylococcal penicillinase. They are also, therefore, referred to as being penicillinase-resistant. This group of antibiotics...

antibiotics. Antibiotics choices depend on regional availability, but a penicillinase-resistant semisynthetic penicillin or a first-generation cephalosporin...

Serratia Vibrio Brucella Chlamydia trachomatis Staphylococcus (including penicillinase-producing and methicillin-resistant strains) Mycoplasma Mycobacterium...