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Table 3 Sensitivity of some indicator strains to SID EGY II

From: Unusual non-fluorescent broad spectrum siderophore activity (SID EGYII) by Pseudomonas aeruginosa strain EGYII DSM 101801 and a new insight towards simple siderophore bioassay

Indicator strain SID EGY II activity (SAU/mL: inhibition zone diameter in mm)a Gram-nature
Bacteria
 Acinetobactersp. (clinical isolate, Faculty of Medicine, University of Alexandria) 0.00 Gram-negative
 Bacillus subtilis NCTC 10400/ATCC 6633 0.00 Gram-positive
 B. subtilis (environmental strain isolated from soil, Egypt) 173.3 ± 6.7 Gram-positive
 B. subtilis AS1 (environmental strain isolated from soil, Egypt) 0.00 Gram-positive
 Bacillus subtilis EMBLAKE (environmental strain isolated fromEl-Mahmoudia lake, Egypt) 0.00 Gram-positive
 Bacillus sp. YAS 1(environmental strain isolated from soil, Egypt) 0.00 Gram-positive
 Bacillus sp. Ash2 (environmental strain isolated from soil, Egypt) 0.00 Gram-positive
 B. cereus (environmental strain isolated from soil, Egypt) 0.00 Gram-positive
 B. licheniformis SHG2 (environmental strain isolated from soil, Egypt) 0.00 Gram-positive
 B. licheniformis SHG6(environmental strain isolated from soil, Egypt) 0.00 Gram-positive
 B. licheniformis SHG10 DSM 28096 (environmental strain isolated from soil, Egypt) 0.00 Gram-positive
 Campylobacter jejuni NCTC 11322/ATCC 29428 0.00 Gram-negative
 Citrobacter sp. (clinical isolate, Faculty of Medicine, University of Alexandria, Egypt) 0.00 Gram-negative
 Clostridium perfringens NCTC 8237/ATCC 13124 0.00 Gram-positive
 Escherichia coli NCTC 12241/ATCC 25922 250 ± (5.7) Gram-negative
 E. coli (clinical isolate, Faculty of Medicine, University of Alexandria, Egypt) 0.00 Gram-negative
 Enterococcus sp.(clinical isolate, Faculty of Medicine, University of Alexandria, Egypt) 0.00 Gram-negative
 Enterobacter aerogenes NCTC10006/ATCC13043 0.00 Gram-negative
 Enterobacter sp. (clinical isolate, Faculty of Medicine, University of Alexandria) 130 ± (9.1) Gram-negative
 Enterococcus faecalis NCTC 12697/ATCC 29212 336 ± (11.2) Gram-negative
 E. amylovora strain EGY1 DSM 101800 (Plant pathology department, Faculty of Agriculture, University of Alexandria, Egypt) 390 ± (5.8) Gram-negative
 Klebsiella sp. (clinical isolate, Faculty of Medicine, University of Alexandria, Egypt) 0.00 Gram-negative
 Listeria innocua NCTC 11288/ATCC 33090 0.00 Gram-negative
 Proteus sp. (clinical isolate, Faculty of Medicine, University of Alexandria, Egypt) 0.00 Gram-negative
 Pseudomonas aueroginosa (clinical isolate, Faculty of Medicine, University of Alexandria, Egypt) 0.00 Gram-negative
 Staphylococcus aureus NCTC 12981/ATCC 25923 176 ± (6.3) Gram-positive
 S. aureus (clinical isolate, Faculty of Medicine, University of Alexandria, Egypt) 0.00 Gram-positive
 S. epidermidis NCTC 13360/ATCC 12228 0.00 Gram-positive
 Shigella boydii ATCC 9207 110 ± (5.8) Gram-negative
 Salmonella typhi (clinical isolate, Faculty of Medicine, University of Alexandria, Egypt) 0.00 Gram-negative
 S. paratyphi (clinical isolate, Faculty of Medicine, University of Alexandria,Egypt) 236 ± (8.8) Gram-negative
 S. typhimurium NCTC 12023/ATCC 14028 0.00 Gram-negative
 Saccharomyces cerevisiae NCPF 3178 0.00
 Vibrio parahaemolyticus NCTC 3178 160 ± (11.6) Gram-negative
Fungi and yeasts
 Aspergillus brasiliensis NCPF2275/ATCC16404 0.00
 Candida albicans NCPF 3179/ATCC10231 143 ± (8.6)
 Candida tropicalis (human clinical isolate from diabetic foot, Department of Microbiology, Medical Research Institute, University of Alexandria, Egypt) 126.6 ± 3.34
  1. aMean of three readings
  2. Values in between the parenthesis indicate standard error (SE)