Researchers have analyzed drinking water and detected oocysts of Cryptosporidium and cysts of Giardia, two protozoa that cause outbreaks of diarrhea in humans. The levels detected are very low and do ...
DURING recent years, there has been increasing amount of evidence regarding the importance of protozoa in the aerobic purification of sewage 1–4 and, more recently, some quantitative observations on ...
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