Naslov
Survival of ESKAPE pathogen Acinetobacter baumannii in water of different temperatures and pH

Autori
Dekic, Svjetlana ; Hrenovic, Jasna ; Ivankovic, Tomislav ; van Wilpe, Erna

Izvornik
Water science and technology (0273-1223) 78 (2018), 6; 1370-1376

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

Ključne riječi
Acinetobacter baumannii, pH, survival, temperature, water media

Sažetak
Bacterium Acinetobacter baumannii is an emergent pathogen associated with nosocomial infections, which could be also found in natural waters. The impact of ecological factors on A. baumannii is insufficiently investigated. The aim was to examine the influence of temperatures (−20 to 80 °C) and pH values (2 to 12) on the survival of environmental and clinical isolates of A. baumannii in nutrient-deprived spring water (SW) and nutrient-rich diluted Nutrient Broth (DNB) during 5 months. A. baumannii successfully survived at −20 to 44 °C and neutral pH for 5 months, which is consistent to the persistence of this pathogen in the hospital environment. At temperatures 50 to 80 °C the survival of A. baumannii ranged from 5 days to 5 min. The pH 2 was the most lethal with survival time up to 3 hours, suggesting that acidic conditions are promising for disinfection of water contaminated with A. baumannii. Although the type of media was not statistically significant for long-time survival, the extensively- or pandrug-resistant isolates survived better in SW than susceptible or multidrug-resistant isolates. Two distinct colony phenotypes were recorded at extreme temperatures and pH values. The results of this study provide insight into the behaviour of this emerging pathogen in the environment.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA