Nanoniosome-encapsulated levoflaxicin as an antibacterial agent against Brucella
Abstract
A study was conducted to examine the prevalence of brucellosis (in animal farms) in the vicinity of Islamabad and Rawalpindi. A total of 170 milk samples were collected randomly from several farmhouses. The collected milk samples were initially screened by a Brucella selective medium. The bacterial isolates grown on the selective medium were subjected to biochemical identification for further confirmation of Brucella species. Among the tested samples, 28 (16.4%) were found positive for selective medium and 14 (8.2%) were found positive after biochemical confirmation. The antimicrobial susceptibility of several antibiotics performed by the disc-diffusion method did not yield any significant findings. Encapsulating antimicrobial drugs in unilamellar niosomes is an effective approach to treat the endemic infection. In this study, the antimicrobial activity of niosome-encapsulated levofloxacin is compared with free drug. The drug-encapsulating and empty niosomes were synthesized by using two surfactants Tween 80 and Span 40. Niosomal characterization included electron microscopy, dynamic light scattering, and zeta potential. The encapsulation efficiency was found to be 78% and 74% for Span 40 and Tween 80 niosomes, respectively. The antibacterial activity of niosomal levofloxacin was evaluated against the identified Brucella species and the antimicrobial activity of the free drug was increased many folds after encapsulation. In this study, levofloxacin niosomes were successfully…
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