Survival of human immunodeficiency virus (HIV), HIV-infected lymphocytes, and poliovirus in water

Article Abstract:

The stability of cell-free human immunodeficiency virus (HIV), lymphocytes actively replicating HIV and poliovirus in tap water was evaluated. The detection of HIV viral sequences by polymerase chain reaction (PCR) amplification was also compared with the recovery of HIV by an infectivity assay. The results indicate that either free or cell-associated HIV added to dechlorinated tap water was rapidly inactivated. Moreover, the detection of viral sequences by PCR amplification appears to be not related to the presence of infectious virus.

Health aspects, HIV (Viruses), HIV, Poliovirus, Polioviruses

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Protozoan bacterivory and Escherichia coli survival in drinking water distribution systems

Article Abstract:

Research was performed to quantify bacteria and protozoa present in drinking water distribution systems and obtain direct and indirect proof of protozoan feeding on bacteria in both GAC water and in nanofiltered water. Research revealed that GAC water-supplied network largely contained flagellates, ciliates, thecamoebae and naked amoebae. The nanofiltered water, which contains biofilm, contained no organisms larger than bacteria.

Research, Bacteria, Pathogenic, Pathogenic bacteria, Drinking water, Contamination

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Comparison and recovery of Escherichia coli and thermotolerant coliforms in water with a chromogenic medium incubated at 41 and 44.5 deg C

Article Abstract:

The commercial chromogenic medium CHROMagarECC supplemented with sodium pyruvate is effective for detecting thermotolerant coliforms in water samples. An incubation temperature of 41 deg C is adequate.

Evaluation, Identification and classification, Culture media (Biology), Culture media

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