Naslov
Performance characteristics of the temperature-modified ISO 9308-1 method for the enumeration of Escherichia coli in marine and inland bathing waters

Autori
Jozić, Slaven ; Vukić Lušić, Darija ; Ordulj, Marin ; Frlan, Erina ; Cenov, Arijana ; Diković, Sonja ; Kauzlarić, Vesna ; Fiorido Đurković, Lara ; Stilinović Totić, Jasmina ; Ivšinović, Danijela ; Eleršek, Nives ; Vucić, Anita ; Peroš-Pucar, Danijela ; Unić Klarin, Branka ; Bujas, Lidija ; Puljak, Tatjana ; Mamić, Mirna ; Grilec, Dolores ; Jadrušić, Marija ; Šolić, Mladen

Izvornik
Marine pollution bulletin (0025-326X) 135 (2018); 150-158

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Temperature-modified method ; Bathing water ; Escherichia coli ; Performance characteristics ; Chromogenic coliform agar

Sažetak
This study defines performance characteristics of the temperature- modified ISO 9308-1 method for E. coli enumeration in bathing water. After a 4-hour resuscitation period at 36 ± 2 °C, the incubation temperature was changed to 44 ± 0.5 °C. Elevated incubation temperature significantly suppressed the growth of thermo- intolerant bacteria, and enhanced the selectivity of Chromogenic Coliform Agar (CCA) up to 49.5% for inland and up to 66.0% for coastal water. Consequently, most of the selectivity- related performance characteristics are improved. Relative recovery was determined by comparing an alternative method against the reference, ISO 9308- 1:2014 method, following the criteria set out in ISO 17994:2014. Temperature modification did not significantly alter the results and the methods were evaluated as “not different” for both, coastal and inland waters. Chromogenic Coliform Agar was assessed as a suitable medium for reliable E. coli enumeration in bathing water when incubated for 17–19 h at 44 ± 0.5 °C after the 4–5 h resuscitation period at 36 ± 2 °C.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA