Formulation and characterization of Ciprofloxacin encapsulated liposomes: In vitro antimicrobial activity against multi drug resistant Salmonella typhi

  • M. Aslam Department of Biotechnology, Lahore college for Women University, Pakistan
  • M. Iqtedar Lahore College for Women University
  • H. Saeed Punjab University College of Pharmacy, Lahore. Pakistan.
  • R. Abdullah Department of Biotechnology, Lahore College for Women University, Lahore. Pakistan.
  • A. Kaleem Department of Biotechnology, Lahore College for Women University, Lahore. Pakistan.
Keywords: Salmonella typhi, Nanocarriers, Liposomes, Ciprofloxacin, Multidrug-resistant (MDR)


Since decades antibiotics are used against bacterial infections, however for past few years world is fronting serious challenge due to emergence of bacterial antibiotic resistance for which new alternatives of cure are being sought. Liposomes are universally used nano-carriers designed to carry drug safely to action site. Emergence of antibiotic resistance in Salmonella typhi has left us with very few choices of cure. In current study liposomes were designed to carry ciprofloxacin and In vitro efficacy analyzed against multi drug resistant Salmonella typhi. Ciprofloxacin loaded liposomes prepared with Bx-DSPE-PEG(2000) (0.1%), total 100mg lipids, Phosphatidylcholine (PC) and Cholesterol (CH) at ratio of 5:3 had 93.95% encapsulation efficiency. Efficacy was observed through MIC and MBC by time kill assay. The encapsulation efficiency of cipro-loaded liposomes increased from 30% to 93.95% with increase cholesterol content. They showed slow to fast reléase, stability reduced from 93.95% to 71.9% over period of 9 months. Polydispersity index  was 0.7, particle size 95.27nm with -20.58mV zeta potential. As compared to drug alone MBC and MIC achieved for ciprofloxacin encapsulated liposomes was at lower drug concentrations i.e. 15 µg/ml, and 10 µg/ml. Conclusively, ciprofloxacin encapsulated liposomes prooved an effective in vitro drug delivery method against MDR Salmonella typhi.


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How to Cite
Aslam, M., Iqtedar, M., Saeed, H., Abdullah, R., & Kaleem, A. (2022). Formulation and characterization of Ciprofloxacin encapsulated liposomes: In vitro antimicrobial activity against multi drug resistant Salmonella typhi. Revista Mexicana De Ingeniería Química, 21(2), Bio2734.