关键词: 异尖线虫, 海鱼, 感染

Abstract:

From 2015 to 2018, marine fish selling in market of four districts and three counties of Anshan City were sampled according to the National Food Safety Risk Monitoring Plan. Anisakis was examined by direct dissection, and isolated for species identification. A total of 303 fish from 60 samples of 12 species of marine fish were collected. Among them, Anisakis stage-3 larvae were detected in 158 fish from 28 samples of 6 species. The detection rate from the samples was 46.7% (28/60), the total positive rate among all the fish species was 52.2% (158/303), and the average infection intensity was 5.99 larvae/fish (947/158). Among the 6 species of fish infected, the infection rate was highest in Miichthys miiuy, 100% infection in all 5 fishes, followed by Pneumatophorus japonicus (3/4), Larimichthys polyactis(64.4%, 114/177), Trichiurus lepturus (50.8%, 32/63), Scomberomorus niphonius (3/18), and Cololabis saira (1/16). The infection intensity from the highest to the lowest larvae/fish was in following order: Miichthys miiuy (8.20), Larimichthys polyactis (6.28), Trichiurus lepturus (5.67), Scomberomorus niphonius (4.84), Pneumatophorus japonicus (3.67), and Cololabis saira (1). From 2015 to 2018, 22, 10, 14 and 14 marine fish samples were respectively collected, among them, the detection rate in 2015 was highest at 72.7% (16/22). In different sampling sites, the fish with highest detection rate were found from county supermarkets, showing 5 out of 6 samples being detected positive, followed by urban farm markets, with the detection rate of 46.7% (14/30). These findings indicate a considerably high infection rate of Anisakis found in marine fish from market of Anshan City, thus food health education should be strengthened.

Key words: Anisakis, Marine fish, Infection