Although resistance to the expanded-spectrum cephalosporins among members of the family Enterobacteriaceae lacking inducible b-lactamases occurs virtually worldwide, little is known about this problem among isolates recovered in South Africa. Isolates of Klebsiella pneumoniae, Escherichia coli, and Proteus mirabilis resistant to expanded-spectrum cephalosporins recovered from patients in variou...

β-Lactam antibiotics are among the most widely used antibiotics against microbial pathogens. However, enzymatic hydrolysis of these antibiotics by bacterial β-lactamases is increasingly compromising their efficiency. Although new generation β-lactam antibiotics have been developed to combat antibiotic resistance, β-lactamases have also evolved along with the new variants of the substrate. A str...

Aims: This study aimed to screen for Beta Lactamases (BLs) and other resistant bacteria among patients admitted the emergency unit of Yaoundé University Teaching Hospital (YUTH).
 Study Design: was a cross-sectional hospital-based study.
 Place Duration Study: conducted at Bacteriology YUTH, Yaoundé- Cameroon between February June 2020.
 Methodology: Seventy-Five urine samples we...

The production of β-lactamase enzymes is the main mechanism of resistance to β-lactam antibiotics in gramnegative bacilli. Therefore, it is important to identify the β-lactamases-producing bacteria for the treatment of caused infections. This article aimed to review the recent literature and guidelines regarding phenotypic detection of β-lactamases in common gram-negative bacilli in clinical sa...

Metallo β-lactamases is the name given to certain enzymes found in gram negative bacteria belonging to Enter-obacteriaceae which confers resistance to all β-lactam antibiotics including carbapenems except monobactams. They belong to Ambler molecular class B and Bush-Jacoby-Medeiros Group 3.1,2 Resistance to carbapenems due to production of metallo β-lactamases in Gram Negative organisms is an i...

The widespread use of β-lactam antibiotics has lead to the development of resistance to this group of antibiotics in bacterial pathogens due to various types of β lactamase production. Amongst the mechanisms of resistance to third generation cephalosporins, production of extended spectrum β-lactamases (ESBLs) and AmpC β lactamases is the most common1. Since both ESBL and AmpC β-lactamase are en...