Tehran University of Medical Sciences Iranian Journal of Parasitology 1735-7020 19 3 2024 08 19 366 369 Dimitar Vuchev Department of Infectious Diseases, Parasitology and Tropical Medicine, Section of Parasitology, Medical Universi-ty of Plovdiv, Plovdiv, Bulgaria Galya Popova Department of Infectious Diseases, Parasitology and Tropical Medicine, Section of Parasitology, Medical Universi-ty of Plovdiv, Plovdiv, Bulgaria Maya Tomova Department of Parasitology, Regional Health Inspectorate, Varna, Bulgaria 2023 12 13 2024 03 11 We report a case of infection with the zoonotic nematode Gongylonema sp. in a 24-year-old woman from Varna, Bulgaria. Two days before seeking medical attention, the patient had noticed a filamentous mass in her buccal mucosa that migrated when touched with the tongue. She manually removed a thread-like worm from the mucosa near her lower lip. Albendazole was prescribed for three days. The patient had no history of travelling abroad or contact with animals. To our knowledge, this is the sixth case that has been reported in the country. https://ijpa.tums.ac.ir/index.php/ijpa/article/view/4104 https://ijpa.tums.ac.ir/index.php/ijpa/article/download/4104/1380