[Presence of potentially pathogenic bacteria and fungi in the cooling-lubricating emulsion used in the aluminum sheet rolling process]. / Obecnosc potencjalnie chorobotwórczych bakterii i grzybów w emulsji chlodzaco-smarujacej stosowanej w procesie walcowania blachy aluminiowej.

Microbiological tests of aluminium rolling water-oil emulsion reveal high level of contamination: relatively anaerobic bacteria 10(6)-10(8) cells/ml, fungi and yeasts 10(3)-10(4) cells/ml, and also anaerobic bacteria Desulfovibrie sp. reducing sulfates to hydrogen sulfide. In emulsion samples there were present bacterial strains potentially dangerous to health, belonging to the family Enterobacteriaceae, Vibrionaceae, Pseudomonadaceae, Bacillaceae. The fungi and yeasts found in the emulsion were identified as: Aspergillus sp., Penicillium sp., Cladosporium sp., Cephalosporium sp., Candida sp. The emulsion sprayed in aerosol in air of the mill was the infecting source for the workers. The emulsion was protected by a biocid and thus the growth of potentially pathogenic microorganisms was inhibited.

Experimental infection in rabbits evoked by Pseudomonas aeruginosa, Proteus mirabilis, Escherichia coli and Klebsiella pneumoniae treated with gentamicin, amikacin and sisomicin.

Rabbits were infected with freshly isolated strains of Ps. aeruginosa, P. mirabilis, E. coli or K. pneumoniae and treated with gentamicin, amikacin or sisomicin in a controlled study. Therapeutic results were evaluated by survival of animals and viable counts of etiologic bacteria in several tissues after sacrification of treated animals at the same time. Sisomicin was the drug of choice for Ps. aeruginosa and P. mirabilis infections, when compared with amikacin and gentamicin. Its action is practically equal to that of amikacin in K. pneumoniae infection. Sisomicin appeared less active in E. coli infections than amikacin, but was superior to gentamicin.