Ashrafi Keyhan, Valero Maria Adela, Massoud Jafar, Sobhani Abdolrasoul, Solaymani-Mohammadi Shahram, Conde Patricia, Khoubbane Messaud, Bargues Maria Dolores, Mas-Coma Santiago
Department of Medical Microbiology, Faculty of Medicine, Gilan University of Medical Sciences, Gilan University Complex, Rasht, Iran.
Am J Trop Med Hyg. 2006 Aug;75(2):295-302.
Contamination by fasciolids takes place through ingestion of metacercariae attached to vegetables. Experimental studies were performed with plant-made foods suggesting a role in human contamination in Iran and on the usefulness of potassium permanganate as a preventive tool for killing metacercariae attached to vegetables used in salads in Egypt. In the foods assayed, although viability decreases with time, a high percentage of the metacercariae were still alive 2 and 4 weeks after preparation. Infection of laboratory animals proved that metacercariae kept their infectivity. The 5-minute tests of potassium permanganate effects showed that metacercarial viability was not affected even at the very high doses of 300, 600, and 1,200 mg/L. Careful, subsequent washing of leaves and vegetables with water is therefore needed after its application. A review on similar studies performed with metacercariae belonging to fasciolid and other trematode species affecting humans is included.
片形吸虫的污染是通过摄入附着在蔬菜上的囊蚴发生的。对植物性食品进行了实验研究，结果表明其在伊朗人类感染中起一定作用，同时也证明了高锰酸钾作为一种预防工具，对于杀死埃及用于沙拉的蔬菜上附着的囊蚴是有用的。在所检测的食品中，尽管囊蚴的活力会随时间下降，但在制备后2周和4周时，仍有很大比例的囊蚴存活。对实验动物的感染证明囊蚴保持了其感染力。高锰酸钾作用的5分钟试验表明，即使在300、600和1200毫克/升的高剂量下，囊蚴的活力也不受影响。因此，在使用高锰酸钾后，需要仔细地随后用水冲洗叶子和蔬菜。本文还综述了对影响人类的片形吸虫和其他吸虫类囊蚴进行的类似研究。
