| abstract |
(57) [Summary] [PROBLEMS] To be able to more easily and for a long time prevent or eliminate adverse effects caused by the propagation of protozoa such as bacteria, molds and algae in waterways such as drains of refrigerators and freezers. And a novel sustained-release antigenic biologic. A sustained-release antigenic biologic using a water-insoluble or poorly soluble solid polymer at room temperature as a sustained-release base, a method for producing the same, and a method for producing the same. A method for eradicating or preventing the propagation of protists in a waterway, comprising placing a biologic in the waterway. |