Ключевые слова: animal, background, biological, biology, design, disease, egg, fluke, freshwater, graphic, head, health, healthy, host, human, illustration, isolated, laboratory, liver, medical, medicine, microscopy, nature, opisthorchis, parasite, parasitic, pictogram, research, science, set, silhouette, susceptible, tapeworm, technology, test, trematode, viverrini, white, wildlife, worm,