Ключевые слова: aid, alternative, animal, annelid, background, biology, black, blood, bloodsucker, bloodsucking, collection, detail, health, healthcare, hematophagia, hermaphrodite, hirudinea, hirudo, hirudotherapy, hospital, human, illness, insect, invertebrate, isolated, leech, macro, medical, medicinal, medicinalis, medicine, microbiology, nature, parasite, parasitic, pest, research, science, set, suck, sucker, tentacle, therapy, treatment, tropical, wet, white, wildlife, worm,