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Bottled water in Tripoli-Libya

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Bottled water in Tripoli-Libya

  1. 1. BACETERIOLOGICAL QUALITY OF BOTTLED WATER IN TRIPOLI-LIBYA Mohamed M. Elemam, Khalifa Sifaw Ghenghesh*, Khaled Dahmani, Souad A. El-Megrahi, and Sana M. Abid Biotechnology Research Center, Tripoli and *Dept. of Medical Microbiology, Faculty of Medicine, Tripoli-Libya
  2. 2. INTRODUCTION • Bottled water is now the biggest selling soft drink in Europe. • In the UK sales topping 700 million litres in 1994 (Natural Mineral Water Association, UK). • In Libya the demand on bottled water has increased tremendously in recent years and this trend is expected to continue. • Data regarding the bacteriological quality of bottled water in Libya are very few.
  3. 3. OBJECTIVE • To determine the bacteriological quality of bottled water sold in Tripoli-Libya.
  4. 4. MATERIALS & METHODS • Included in the study 220 samples of bottled water representing six popular brands sold in Tripoli. • Total bacterial count (TBC) and coliforms were determined. • Different types of bacteria were isolated and identified using standard bacteriological procedures and API 20NE. • The study was carried out between April September 2002.
  5. 5. RESULTS • TBC ranged between 0.0 - 2.7 x 104 (mean = 1.7 x 103). • Coliforms were not detected. • Of the 220 samples examined: – Pseudomonas were found in 50 (22.7%), – Gram –ve cocci in 15 (6.8%), – Gram +ve cocci in 3 (1.4%) and – Other bacteria in 6 (2.8%).
  6. 6. Bacteria isolated from different brands of bottled water in Tripoli No (%) positive Bacteria Aqua Siwa El-Nabeh Fezzan Janzour Salsabil Tazerbo (n=22) (n=35) (n=30) (n=50) (n=59) (n=24) --------------------------------------------------------------------------------------------------Pseudomonas 3(14) 0 16(53) 6(12) 19(32) 6(25) G-ve cocci G+ve cocci Other bacteria 0 0 0 15(30) 0 0 2(9) 0 0 1(2) 0 0 0 0 0 0 6(10) 0
  7. 7. CONCLUSIONS • According to international standards, all bottled water samples examined were acceptable microbiologically. • However, the detection of Pseudomonas species, in nearly one fifth of samples examined, may pose a public health problem for immunocompromised consumers of such products. • More studies are needed to determine the bacteriological quality of other brands of bottled water in Libya.

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