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Updated: Jul 19, 2026

Bioprospecting of Extremophilic Microorganisms to Address Environmental Pollution
Published on: December 30, 2021
Metal tolerance and antibiotic resistance patterns of a bacterial population isolated from sea water
S A Sabry1, H A Ghozlan, D M Abou-Zeid
1Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt.
Abstract:
The total aerobic heterotrophic and metal-resistant bacterial communities were studied in marine water. The resistance patterns, expressed as MICs, for 81 bacterial isolates to eight heavy metals were surveyed by using the agar dilution method. A great proportion of the isolates were sensitive to cadmium (99%), mercury (91%), zinc (84%) and cobalt (83%). On the other hand, 94%, 40%, 35% and 22% were resistant to lead, nickel, arsenate and copper, respectively. The majority of the tested strains (95.06%) were multiple metal-resistant, with pentametal resistance as the major pattern (25.9%). The response of the isolates to 11 tested antibiotics was tested and ranged from complete resistance to total sensitivity and multiple antibiotic resistance was exhibited by 70.38% of the total isolated population. The highest incidence of metal-antibiotic double resistance existed between lead and all antibiotics (100%), copper and penicillin (95%) and nickel and ampicillin (83.3%).
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