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Abstract：
Zoonotic fish-borne nematodes are a significant and growing global health concern. However, in Australia their occurrence and geographical distribution are not well known. Moreton Bay in Queensland, Australia, is a popular tourist destination for domestic and international visitors where seafood is a popular food item. The aim of this study was to determine the occurrence of zoonotic nematodes within four commercially significant teleost fish species from Moreton Bay; Surf Bream, Sea Mullet, Yellow-Fin Tripod fish and Gold-Lined Sea Bream. Overall, 34.03% of fish examined (n = 144) were found to be a host to at least one parasitic nematode. The seasonal dynamics and prevalence of nematode infection was tested by statistical means. Results indicated a significant difference in seasonal infection for Surf Bream (p < 0.005) only. Several potentially zoonotic larval morphotypes were found, including Contracaecum types I and II, and Terranova type II (Family Anisakidae), and Hysterothylacium types VI and XIV and a new Hysterothylacium larval type herein assigned as type XVII (Family Raphidascarididae). ITS sequence data showed that some Contracaecum type II and Hysterothylacium types VI found in the present study are genetically distinct from those previously reported. The new genotypes were assigned to Contracaecum type II Genotype B and Hysterothylacium type VI, Genotypes B and C. This study provides essential information for future research on specific identification and differentiation of infective stages of zoonotic nematoda in edible fish.
摘要：
人畜共患病鱼媒线虫是一个重要的和日益增长的全球健康问题。然而,在澳大利亚，它们的发生和地理分布并不为人所知。昆士兰州的摩顿湾,澳大利亚,是国内和国际游客的热门旅游目的地，海鲜是一种受欢迎的食品。这项研究的目的是确定摩顿湾四种具有商业意义的硬骨鱼中人畜共患线虫的发生；SurfBream，SeaMullet,黄鳍三脚架鱼和金色的海燕。总的来说,发现34.03％的鱼类（n=144）是至少一种寄生线虫的宿主。用统计学方法检测了线虫感染的季节动态和流行情况。结果表明，仅SurfBream的季节性感染存在显着差异（p<0.005）。发现了几种潜在的人畜共患幼虫形态类型，包括I型和II型肠衣,和TerranovaII型（异语科），以及VI和XIV型和本文中指定为XVII型（Raphidasa科）的新的赤霉病幼虫类型。ITS序列数据显示，本研究中发现的一些II型和VI型宫尾菌在遗传上与先前报道的不同。新的基因型被指定为II型B基因型和VI型Hysterothylacium，基因型B和C。这项研究为进一步研究食用鱼中人畜共患线虫感染阶段的特定鉴定和分化提供了必要的信息。
