The survey of common bacterial contamination in bottled mineral water

Abstract number: P1645

Mardani M., Gachkar L., Najar Peerayeh S., Asgari A., Hajikhani B., Amiri R.

Background: Bottled mineral water, generally considered more pure than tap water in developing countries. Immunocompromised patient and whom with commorbid condition often receive bottled mineral water under the assumption that it is safer than tap water. To determine the risk of common bacterial contamination of commercial bottled mineral water in Iran, we conducted this study in 2006.

Materials and Methods: The design of the research is descriptive study. 68 samples (35 brand named company) of bottled mineral water was collected from different province of Iran. Initially 200 ml of bottled water was filtered with 0.45 micrometer pore (Sartorius label). The filter was divided by sterile pence and scissor to multiple pieces, suspension in nutrient broth and centrifuged. The culture was made by use of selective media: nutrient agar and broth, dextrose sodium azide agar, yersinia agar, and Clostridium selective agar. The bacterial contamination were detected after incubation in 42°C, 35°C and 25°C for 24 h, 48 h and 7 days.

Results: Out of 68 samples of bottled mineral water (35 brands), 41 samples (60%) showed evidence of contamination with common bacterial, including 15 samples (36%) Gram-positive sporforming bacilli, 20 Samples (49%) Gram-positive non sporforming bacilli (diphteroids) and 6 Samples (15%) Gram-positive cocci. The marker organisms, i.e. the classic faecal contamination indicators were not detected in any of samples.

Conclusion: This finding indicated that the use of bottled mineral water in immunocompotent persons is safe, but the use of this bottled mineral water in immunocompromised patients should be done with meticulouse precaution. Some of bacteria were known human commensals suggesting contamination of waters prior to bottling. It is recommended that bottling, packaging and distribution of this water should be done more surveillance.

Session Details

Date: 19/04/2008
Time: 00:00-00:00
Session name: 18th European Congress of Clinical Microbiology and Infectious Diseases
Location: Barcelona, Spain
Presentation type:
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