Gyöngy Martina, Sellyei Boglárka, Czeglédi István, Székely Csaba, Cech Gábor
HUN-REN Veterinary Medical Research Institute, Budapest, Hungary.
University of Debrecen, Juhász-Nagy Pál Doctoral School, Department of Hydrobiology, Debrecen, Hungary.
Food Waterborne Parasitol. 2024 Jul 25;36:e00236. doi: 10.1016/j.fawpar.2024.e00236. eCollection 2024 Sep.
Digenean (Heterophyidae) trematodes include several zoonotic species such as the genus (Katsurada, 1912). (Ciurea, 1915) is a species widely distributed in Europe, whose metacercariae can be found on cyprinoids from the River Danube in Hungary. The aim of the study was to measure the viability of metacercariae by physical (freezing, heating, desiccation) and chemical (acetic acid and NaCl solutions) treatments. The methods were chosen as a model for procedures commonly used in traditional food preservation (such as freezing, salting, pickling and smoking) to measure the survival rate of metacercariae under different conditions. Most physical treatments (freezing of metacercariae at -20 °C, keeping them at 40 °C and 60 °C and desiccation) and chemical treatments (2.5%, 5%, 10% acetic acid solution and 5% and 10% NaCl solution) killed the metacercariae in a relatively short time (from 30 min to 6 days depending on the treatment) so their effects eliminated the risk of zoonotic infection. On the other hand, the metacercariae survived at room temperature and at 4 °C up to one month. Therefore, storing unprepared fish in domestic refrigerators cannot prevent infection with metacercariae in humans.
复殖吸虫（异形科）吸虫包括几种人畜共患的物种，如属（胜田，1912年）。（丘雷亚，1915年）是一种广泛分布于欧洲的物种，其尾蚴可在匈牙利多瑙河的鲤科鱼类上发现。本研究的目的是通过物理（冷冻、加热、干燥）和化学（乙酸和氯化钠溶液）处理来测定尾蚴的活力。选择这些方法作为传统食品保存常用程序（如冷冻、腌制、酸洗和烟熏）的模型，以测量尾蚴在不同条件下的存活率。大多数物理处理（在-20°C冷冻尾蚴、在40°C和60°C保存以及干燥）和化学处理（2.5%、5%、10%乙酸溶液和5%和10%氯化钠溶液）在相对较短的时间内（根据处理方式从30分钟到6天不等）杀死了尾蚴，因此它们的作用消除了人畜共患感染的风险。另一方面，尾蚴在室温下和4°C下可存活长达一个月。因此，在家用冰箱中储存未处理的鱼并不能预防人类感染尾蚴。
