Table 2.
Distribution and identification of bacterial types in the highest concentrations of heavy metals
| Metal | Sewage | Bacterial isolates | ||
|---|---|---|---|---|
| G+A, rod-shaped | G+A, cocci | G-B, rod-shaped | ||
| K2Cr2°7 [260–310] | CSS | Non-sporulated (43), sporulated (22), actinomycetes (4) | StaphylococciC (26), other (17) | NFD*: Pseudomonas {P. putida (10), P. fluorescens (5), P. aeruginosa (5)}, Alcaligenes spp. (4), Burkholderia cepacia (3), unidentified (10) |
| UHS | Non-sporulated (36), sporulated (25), actinomycetes (7) | StaphylococciC (30), other (11) | NFD*: Pseudomonas {P. aeruginosa (5), P. putida (5), P. fluorescens (3)}, Alcaligenes spp. (2), Stenotrophomonas maltophilia (2), unidentified (5) | |
| AgNO3 [25–35] | CSS | **Non-sporulated (2), **sporulated (1) | ( - ) | NFD: Pseudomonas {P. stutzeri (3), P. aeruginosa (2)}, S. maltophilia (3), Chryseobacterium indologenes (2), Acinetobacter spp. (1) FE: E. cloacae complex (21), Citrobacter {C. freundii (7), C.youngae (2), C. braakii (1)}, Serratia spp. (5), Proteus mirabilis (1), Cronobacter spp.(1) |
| UHS | **Coryneform organisms (10), **sporulated (6) | (3) | NFD: Pseudomonas {P. stutzeri (3), P. aeruginosa (3)}, S. maltophilia (3), C. indologenes (3), Acinetobacter spp. (2) FE: Klebsiella {K. pneumoniae (10), K. oxytoca (1)}, Enterobacter {E. agglomerans (6), E. cloacae complex (5)}, Citrobacter {C. freundii (4), C. youngae (3), C. braakii (1), C. species 10 (1)}, Serratia marcescens (4), Proteus vulgaris (2), Kluyvera cryocrescens (1) |
|
| HgCl2 [≥ 80] | CSS | Non-sporulated (25), sporulated (5) | StaphylococciC (6), other (8) | NFD: Pseudomonas {P. fluorescens (24), P. putida (17), P. aeruginosa (14), Pseudomonas spp. (12)}, B. cepacia (8), Alcaligenes spp. (6), Sphyngomonas paucimobilis (2), Ralstonia pickettii (1) FE: K. pneumoniae (13), E.cloacae complex (10), Serratia {S. liquefaciens group (4), S. rubidaea (2)}, Citrobacter spp. (2); Escherichia coli (1), Aeromonas caviae (2) |
| UHS | Non-sporulated (32), sporulated (10) | StaphylococciC (7), other (5) | NFD: Pseudomonas {P. aeruginosa (22), P. fluorescens (20), P. putida (14), Pseudomonas spp. (14)}, B. cepacia (6), Alcaligenes spp. (4), S. paucimobilis (3), Brevundimonas vesiculares (1), Chryseobacterium meningosepticum (1) FE: Enterobacter {E. cloacae complex (13), E.agglomerans (3)}, K. pneumoniae (9); Serratia spp. (6), Citrobacter {C. freundii (3), C. youngae (2)} |
Abbreviations- CSS, Chemistry school; UHS, University hospital; [ ], µg/mL; ( ), number of strains; ( - ), non detected;
A
Gram positive;
B
Gram negative;
C
grapelike clusters, catalase positive and glucose fermentative;
D
NF, non-fermentative;
E
F: fermentative;
*
absent at 310 µg/mL;
**
absent at 35 µg/mL.