Bacillus spp. in the City of Novi Sad groundwater supplies

Abstract

The paper investigates the presence of spore-forming bacteria of the genus Bacillus among aerobic mesophilic bacteria found in water samples collected from the City of Novi Sad groundwater supplies. Microbiological examination included the samples from three groundwater supplies: Štrand (19 samples), Petrovaradinska ada (10 samples) and Ratno ostrvo (12 samples). Apart from the analysis of groundwater, the research also included microbiological examination of water from the City of Novi Sad water supply system collected from three localities - Liman 1, Slana bara and Stari grad. All samples were inoculated onto Plate Count Agar and low nutrient medium R2A. The presence of Bacillus spp. was detected in all three groundwater supplies. Comparing the samples obtained from the three sites, a significantly higher number or percentage of the genus Bacillus, in comparison with aerobic mesophilic bacteria, was detected in the groundwater supply Štrand using R2A medium. No correlation was detected between the total count of aerobic mesophilic bacteria and Bacillus spp.

Keywords

• aerobic mesophilic bacteria
• Bacillus spp.
• groundwater
• City of Novi Sad