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The influence of temperature, disinfection and water softening of drinking water on the multiplication of Legionella pneumophila
Godič Torkar, Karmen (Avtor), Oder, Martina (Avtor)

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Izvleček
The influence of temperature, disinfectant and water softener for drinking water preparation on the bacterial growth of Legionella pneumophila was examined.The optimal temperature for bacterial growth was 36 °C. At the incubation temperature of 15 °C the multiplying of bacteria slowed down, as confirmed by the bacteriostatic effect of this temperature. The number of bacteria was after the first 24 h of incubation at 55 °C reduced by more than 6 log in comparison to the culture at 36 °C. After 10 minutes of exposure to the disinfectant dichloroisocyanuric acid, the number of bacteria in the culture decreased for 1.4 log CFU mL-1, followed by an intensive growth immediately after the disinfectant degradation. The number of bacteria was up to 72 hours incubation even higher than in the control sample without a disinfectant, and then the number in both samples equalled at approximately 7.3 log CFU mL-1. Sodium polyphosphate used as a water softener stimulated the bacterial growth. The largest difference in growth was observed after 72 h of incubation, which was 1.9 log CFU mL-1 higher in samples with sodium polyphosphate in comparison to those without the softener.

Jezik:Angleški jezik
Ključne besede:Legionella pneumophila, growth curve, temperature, water softener, disinfectant
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:ZF - Zdravstvena fakulteta
Leto izida:2018
Št. strani:str. 34-42
Številčenje:Vol. 12, no. 1
UDK:614.48:579.841
ISSN pri članku:1854-0678
COBISS.SI-ID:5590123 Povezava se odpre v novem oknu
Licenca:CC BY-NC-ND 4.0
To delo je dosegljivo pod licenco Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Število ogledov:80
Število prenosov:27
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Naslov:Sanitarno inženirstvo
Založnik:Inštitut za sanitarno inženirstvo
ISSN:1854-0678
COBISS.SI-ID:216969216 Povezava se odpre v novem oknu

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