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Samples of fermentation fluid for counting the ciliated protozoan population were collected in duplicates and were fixed with an equal volume of 8% formaldehyde.
Athens, GA) has patented a ciliated protozoan Tetrahymena which exemplifies a recombinant system for the expression of heterologous nucleic acids, preferably on the plasma membrane surface.
The presence of four diatom genera (Amphora, Cymbella, Navicula, and Nitzschia), a blue-green algae from the genus Trichodesmium, and colonies of the ciliated protozoan genus Epistylis, were recorded for the first time as epibionts for juvenile American crocodiles (Crocodylus acutus).
The excystment mechanism is important because it permits the ciliated protozoan populations to resist predation, unfavorable physical and chemical conditions and food shortages (Taylor, 1983).
The availability of food is an important biotic factor that controls the distribution of ciliated protozoan populations in the various ecosystems (Noland, 1925; Sleigh, 1988).
These, in turn, are fed on by ciliated protozoans (Madoni 1991) which can reduce the load of pathogenie fecal bacteria to 5% (Curds and Fey 1969).
However, unknown to Adleman and his field, two ciliated protozoans of the genus Oxytricha had solved a much harder problem several million years earlier.