Behavior of Pseudomonas aeruginosa and Enterobacter aerogenes in Water from Filter Jugs

Rossella Briancesco, Stefania Paduano, Maurizio Semproni, Luca Vitanza and Lucia Bonadonna
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Rossella Briancesco: Department of Environment and Health, Italian National Institute of Health, 00161 Rome, Italy
Stefania Paduano: Department of Biomedical, Metabolic and Neural Sciences, Section of Public Health, University of Modena and Reggio Emilia, 41125 Modena, Italy
Maurizio Semproni: Department of Environment and Health, Italian National Institute of Health, 00161 Rome, Italy
Luca Vitanza: Department of Public Health and Infectious Diseases, Microbiology Section, “Sapienza” University of Rome, 00161 Rome, Italy
Lucia Bonadonna: Department of Environment and Health, Italian National Institute of Health, 00161 Rome, Italy

IJERPH, 2020, vol. 17, issue 21, 1-14

Abstract: Careless use conditions of filter jugs were applied to simulate and evaluate the behavior of two ubiquitous aquatic bacterial species, Pseudomonas aeruginosa and Enterobacter aerogenes . According to a reference protocol, nine different jugs of popular brands sold in the Italian market were used for the test. Separately, a suspension of the two bacteria was spiked in water used for filling the jugs. The concentration of the test organisms and total aerobic microbial count (TAMC) was measured daily in the filtered water along a period corresponding to the cartridge lifetime. Results showed a different trend of bacterial behavior. E. aerogenes was detectable exclusively on the first day after jug filling, while P. aeruginosa confirmed its persistence over time in all the jugs and its ability to potentially colonize surfaces and cartridges. The TAMC was detected at a concentration range from 10 2 to 10 7 CFU/100 mL in all the tests, high values that were not far from those raised in bottled flat natural mineral water weeks after bottling.

Keywords: drinking water; Enterobacter; filter jugs; Pseudomonas; total microbial count (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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