Detection and distribution of rotavirus in raw sewage and creeks in São Paulo, Brazil.
Rotaviruses were concentrated from 8-liter samples of raw domestic sewage and sewage-polluted creek water by adsorption to and elution from positively charged microporous filters (Zeta Plus 60S), followed by ultracentrifugation of the filter eluates. Indirect immunofluorescence and direct immunoperoxidase methods allowed detection and enumeration of rotavirus in 6 (20.6%) of 29 sewage samples and in 19 (34.5%) of 55 creek water samples. Levels of rotaviruses ranged from < 3 to 63 focus-forming units (FFU)/liter, and the geometric means were 2.2 FFU/liter in sewage, 2.9 FFU/liter at creek Tremembé, and 2.6 FFU/liter at creek Pirajussara. Wastewater samples examined during autumn and winter months showed a higher rate positivity for rotavirus than those collected in spring and summer, corresponding to the seasonal variation of rotaviral diarrhea in the city of São Paulo.
Department of Microbiology, University of São Paulo, Brazil.
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DU
Mehnert
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Stewien
D001938:Brazil / Q000453:epidemiology; D003967:Diarrhea / Q000453:epidemiology / Q000382:microbiology; D005618:Fresh Water; D012401:Rotavirus / Q000302:isolation & purification*; D012400:Rotavirus Infections / Q000453:epidemiology / Q000382:microbiology; D012722:Sewage; D014871:Water Microbiology; D014873:Water Pollutants; D014881:Water Supply
D012722:Sewage; D014873:Water Pollutants