Ключевые слова: allergies, animal, assembly, biological, disease, education, exhibition, fish, freshwater fish, good health, health, healthy, host, human, information, instruction, instruction media, learning, learning aid, liver fluke, media, medicine, parasite, parasitic, people, pictogram, propagation, protection, science, seminar, set, show, study, study aid, susceptible, thai, thailand, trematode parasite, well being, worm,