Efficacy of activated sludge in removing Cryptosporidium parvum oocysts from sewage. |
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Authors: | I Villacorta-Martinez de Maturana M E Ares-Mazs D Duran-Oreiro and M J Lorenzo-Lorenzo |
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Institution: | I Villacorta-Martinez de Maturana, M E Ares-Mazás, D Duran-Oreiro, and M J Lorenzo-Lorenzo |
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Abstract: | Primary clarifier effluent (procedure B) and final effluent (procedure A) from a wastewater treatment plant were enriched with Cryptosporidium parvum oocysts obtained from the feces of naturally infected calves. Procedure B samples alone were subjected to a laboratory simulation of activated-sludge treatment. Coccidium-free neonatal CD-1 mice were then inoculated intragastrically with procedure A or procedure B samples. Seven days after inoculation, the intensity of oocyst infection in procedure B mice was 91% less than in procedure A mice (controls). |
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