מחקרים כלור-בריכות שחייה-פוליו
"Enteroviruses were isolated from two pools which exceeded the 0.4 ppm free residual chlorine standard. This study appears to be supportive of recent evidence that indicates a higher incidence of enterovirus infection among bathers. All seven wading pool samples contained virus. Total
coliform bacteria were not adequate indicators of the presence of virus, as six of the samples were positive for virus but negative for coliforms.
Total plate counts appeared to provide a better indication of the sanitary quality of the pool water, but viruses could still be detected in samples that met currently recommended bacterial levels. It is possible that swimming and wading pools may serve as a means of transmission of enteroviral disease, especially in children, during summer months.Coxsackieviruses B3 and B4, poliovirus 1, and echovirus 7 were isolated"
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1619862/
"Current standards, based on cell culture assay, indicate that poliovirus is inactivated by 0.5 mg of free chlorine per liter after 2 min; however, integrated cell culture-PCR detected viruses for up to 8 min of exposure to the same chlorine concentration, requiring 10 min for complete inactivation. Thus, the contact time for chlorine disinfection of poliovirus is up to five times greater than previously thought."
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC101488/
מיי שתייה
Poliovirus 1 isolants were recovered from finished drinking water produced by a modern, well-operated water treatment plant. These waters contained free chlorine residuals in excess of 1 mg/liter. The chlorine inactivation of purified high-titer preparations of two such isolants was compared with the inactivation behavior of two stock strains of poliovirus 1, LSc and Mahoney. The surviving fraction of virus derived from the two natural isolants was shown to be orders of magnitude greater than that of the standard strains. These results raise the question whether indirect drinking water standards based on free chlorine residuals are adequate public health measures, or whether direct standards based on virus determinations might be necessary. "
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC291729/
אני אישית לא מתקרב לבריכות שחייה ציבוריות למעלה מ15 שנה. מגעיל אותי ואינטואיטיבית ידעתי שזה רע לי
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