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The inactivation rates of indigenous populations of fecal coliforms, enterococci, Clostridium perfringens, male-specific bacteriophage and somatic coliphage in secondary sewage effluents were compared using chlorine and ozone as disinfecting agents. The fecal coliform indicator was evaluated for its reliability to index viral responses to chlorine and ozone treatments in fecally polluted effluents...
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