Heavy Metals and Antibiotics Resistance of Halophilic Bacteria Isolated from Different Areas in Red Sea, Egypt.
Journal Article
AbdelRahim, Khalid . 2014
Publication Work Type:
Paper
Publication Online URL:
Magazine \ Newspaper:
Egypt. Acad. J. Biolog. Sci.
Issue Number:
1
Volume Number:
6
Pages:
77-89
Publication Abstract:
Hundred and thirty eight (138) bacteria were isolated from 3 different areas on Red Sea governorate, Egypt. Among these
138 moderately halophilic isolates, 2.17%, 3.6%, 6.5%, 9.4%, and 7.2% of the isolates were resistant up to 5mM Cd
2+ and Zn 2+ , 20 mM for Cu 2+ , Pb 2+ , and Co 2+ , respectively. The majority of halophilic bacterial isolates showed resistance to more than 10 mM to these metals except Cd 2+ . All strains were resistant to lead, whereas 50% only of the strains were resistant to cadmium. The resistance to (Cd2+ + Cu2+); (Zn2+ + Cu 2+) showed the highest values between bacteria (6.5%), whereas 4.34% of the isolated strains were resistant to (Cd 2+ , Zn2+) and (Zn 2+ + Pb 2+),
but 2.17% of the isolates were resistant to 3 metals (Cd 2+ , Zn 2+ ,Cu2+); (Zn2+, Cu 2+ , Co2); (Cu2+ , Co2+ , Pb2+
) and resistant to 4 metals (Zn2+ , Cu2+ , Co2+ , Pb 2+); (Cd 2+ , Zn 2+ Cu 2+ , Co 2); (Cd2 ,Zn2+ , Cu2+ , Pb2+); (Zn 2+
, Pb 2+ ,Cu 2+ , Co 2 ). No bacterial isolates were resistant to the 5 metals combined. The isolated halophilic bacteria exhibited sharp peaks of resistance to drugs such as: Velosef 95%, Cceftriaxone, 91.66%, Ampicillin 83.33
%, Nitrofurantion 81.66%, Tarivid 80%, Cephalothin 73.33%, Cephalexin 66.66%, Cefadroxil 83. 33%, and Flucloxacillin 85% whereas few isolates (6.6%) were resistant to Vancomycin.