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 (bā′tə-lăk′təm, bē′-)
1. A lactam composed of a four-membered ring, formed by intramolecular condensation of an amino acid in which the amino group is located at the beta position, or any compound containing this group.
2. A beta-lactam antibiotic.

[beta, second (in the series of lactam rings, the first being the simplest) + lactam.]
References in periodicals archive ?
Tenders are invited for supply and installation of enhancing the capacity of betalactam electrical panel
New findings in betalactam and metronidazole resistant Bacteroides fragilis group.
Both nafcillin and cefazolin are considered first-line options for for therapy for most MSSA infections, and recent studies suggest that the two betalactam antibiotics have similar efficacy, Dr.
The Delvotest method have a good detection limits for a wide range of betalactam antibiotic, sulphonamide, and tylosin residuals in ewe milk, but do not detect streptomycin, gentamycin, neomycin, erythromycin, oxytetracycline, tetracycline, chloramphenicol and trimethoprim [5].
Flavone markedly affects phenotypic expression of betalactam resistance in methicillin-resistant Staphylococcus aureus strains isolated clinically.
However, in patients with comorbidities (chronic heart, lung, liver, or kidney disease, diabetes, alcoholism, malignancy, or asplenia), or in patients whom have undergone antibiotic treatment within the previous three months, a respiratory fluoroquinolone or betalactam antibiotic should be added to the standard macrolide regimen.
Production of beta-lactamase enzyme which renders betalactam anbiotics inactive by hydrolysing them is one of the most important mechanisms of resistance for many bacteria species and mainly for enterobacteriaceae members.
Orchid is among the largest generic betalactam antibiotics manufacturers globally.
Currently, Neopharma has independent production blocks for the manufacture of general and betalactam products.
Neopharma at present has independent production blocks for the manufacture of general and betalactam products.