|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 11 van 112 gevonden artikelen
| Titel: |
Bacterial Contamination of the Swimming Pools in Shiraz, Iran; Relationship to Residual Chlorine and Other Determinants |
| Auteur: |
M. Neghab H.A. Gorgi M.A. Baghapour A. Rajaeefard M.D. Moemenbellah-Fard |
| Verschenen in: |
Pakistan journal of biological sciences |
| Paginering: | Jaargang 9 (2006) nr. 13 pagina's 2473-2477 |
| Jaar: |
2006 |
| Inhoud: |
The aims of this study were two fold; first to evaluate the degree of microbial contamination of the exposed and covered pools with selected groups of bacteria (major indices of water contamination) and second to assess the relationship between the degree of contamination and variables such as the mean value of residual chlorine, pH, temperature, etc. in the pools. Accordingly, numerous water samples were taken from all active pools and using the standard methods, were analyzed for bacteriologic and physicochemical properties. The data indicate that 51.3% of the total samples were contaminated with Pseudomonas. Furthermore, 16.6, 11 and 7% of the total samples were contaminated with Escherichia coli, fecal coliforms and streptococci, respectively. The mean value of residual chlorine in Pseudomonas contaminated samples was 0.45 mg L-1. However, the corresponding value for non-contaminated samples was 1.052 mg L-1 and the difference was statistically significant (p<0.02). Similarly, 26.3% of the samples collected from the covered pools and 53.9% of those collected from exposed pools were contaminated with Pseudomonas. Statistical analysis of the data revealed that there was a significant difference (p<0.02) between the degree of contamination with Pseudomonas in exposed pools as compared to that of covered pools. Additionally, our data show that the source of water supply is also a major determinant of the degree of contamination. Surprisingly, public pools filled with well water were found to be less contaminated with different germs as compared to those filled with normal tap water. Moreover, the mean value of residual chlorine in E. coli contaminated samples was significantly different (p<0.0008) from that of non-contaminated samples. Exposed pools were found to be more contaminated with E. coli than covered pools. However, this difference could be attributed to a significant difference between the mean values of residual chlorine in these two different types of pools. Similar observations were made for contaminated and non-contaminated samples with fecal streptococci and coliforms. There was an inverse relationship between the number of coliforms and the mean value of residual chlorine in the pools. In conclusion, the observation that public pools in Shiraz, apart from a few exceptions, were generally contaminated with different germs, calls for a more strict supervision on the pools by the health authorities. In the absence of such supervision, contaminated pools continue to pose a significant risk to the health of swimmers. |
| Uitgever: |
Asian Network for Scientific Information (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 11 van 112 gevonden artikelen
| << vorige | volgende >> |