Biofilm Formation by Environmental Microbes Isolated from Hospitals in Karachi, Pakistan

Authors

  • Aneela Shaheen Department of Microbiology, University of Karachi, Karachi-75270, Pakistan
  • Rakhshanda Baqai Dadabhoy Institute of Higher Education, Main campus Karachi, Karachi, Pakistan

Keywords:

Biofilm, Bacteria, Fungi, Hospital acquired infection.

Abstract

The purpose of this study was to isolate and identify the microbes from hospital environmental samples and to evaluate the potential of biofilm formation by isolated microbes. For this, 125 surface swabs of different environmental samples were taken from PNS SHIFA hospital, Karachi, Pakistan. Bacteria and fungi were isolated and identified by culture plate method. Trypticase soy broth (TBS) media was used for biofilm development by microbes in plastic tubes. Developed biofilm in tubes was visualized with crystal violet staining method and then biofilm forming potential was estimated by measuring the optical density through spectrophotometer. Total 202 microbes including 126(62.38%) bacteria and 76(37.62%) fungi were isolated and identified. Among environmental samples, hospital ward curtains and medical trays were highly contaminated with bacteria and fungi (with 26% each of total assemblage respectively). Staphylococcus aureus was in highest abundance followed by Candida albicans with 28.7% and 15.8% of total assemblage of isolation respectively. Moreover; Staphylococcus aureus followed by Candida albicans also found to have highest potential to form biofilm with 30.25% and 23.52% of total assemblage of biofilm formation respectively which clearly indicates that  Staphylococcus aureus and Candida albicans may recognized as major agents of hospital acquired infection and can relate with enhanced potential of biofilm formation. Highest abundance and biofilm formation potential of bacteria and fungi in combination can also underline a direct extensive and striking interaction between prokaryotic and eukaryotic cells in biofilm.

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Published

2016-01-15

How to Cite

Shaheen, A., & Baqai, R. (2016). Biofilm Formation by Environmental Microbes Isolated from Hospitals in Karachi, Pakistan. American Scientific Research Journal for Engineering, Technology, and Sciences, 15(1), 240–251. Retrieved from https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/1238