Bioassay is considered to be a relatively new technique, known the scientific community for about 30 years. This article covers method of determining total toxicity by bioassay using infusoria. Microorganisms from 4 genera can used technique: Tetrahymena, Stylonicha, Paramecium, Colpoda. The in food and feed. Advantages this comparison with traditional methods are given. results patent search o...

community-acquired pneumonia and brucellosis are of the main agents causing mortality in the world. the most important limitations for the identification of these agents include their high resistance against environmental conditions, impossibility of rapid and on time diagnosis, low level of infective dose, and lack of existence of vaccine against many types of them. hence, on time action and d...

The same dosage of ultraviolet (UV) radiation retards division of several protozoans more effectively when the light is intermittent than when it is continuous, and especially at temperatures of 25-35 degrees C. At lower temperatures the difference between the effects of intermittent and continuous radiations is less marked. Somewhat similar results were obtained with the ciliates Paramecium ca...