Protozoa are known to selectively graze bacteria and can differentiate prey based on size and viability, but less is known about the effects of prey cellular composition on predator selectivity. We measured the effect of growth phase and elemental stoichiometry of Escherichia coli on grazing by two ciliates, Euplotes vannus and Cyclidium glaucoma. Bacterial cells of a single strain were transfo...

Increasing awareness of hazards associated with the use of antibiotic and chemical feed additives has accelerated investigations into plants and their extracts as feed additives. The present review mainly discusses two classes of plant secondary compounds in this context, i.e. essential oils and saponins. The broader potential of plants and their extracts is illustrated by the progress of an EC...

Two ciliate protozoans, Stylonychia mytilus and Paramecium caudatum isolated from tannery effluent and cultured in a medium containing inorganic salts showed tolerance against endosulfan (1.8 μg/ml). The protozoans uptake the insecticide from the medium for utilization. Stylonychia mytilus reduced 21% endosulfan from the medium within 48 hours of inoculation of insecticide containing medium wit...