University of Otago, Dunedin, New Zealand.
James Cook University, College of Science and Engineering, Townsville, Australia.
Parasitology. 2022 Mar;149(3):380-395. doi: 10.1017/S0031182021001943. Epub 2021 Nov 10.
In response to annual outbreaks of human cercarial dermatitis (HCD) in Lake Wanaka, New Zealand, ducks and snails were collected and screened for avian schistosomes. During the survey from 2009 to 2017, four species of Trichobilharzia were recovered. Specimens were examined both morphologically and genetically. Trichobilharzia querquedulae, a species known from four continents, was found in the visceral veins of the duck Spatula rhynchotis but the snail host remains unknown. Cercaria longicauda [i.e. Trichobilharzia longicauda (Macfarlane, 1944) Davis, 2006], considered the major aetiological agent of HCD in Lake Wanaka, was discovered, and redescribed from adults in the visceral veins of the duck Aythya novaeseelandiae and cercariae from the snail Austropeplea tomentosa. Recovered from the nasal mucosa of Ay. novaeseelandiae is a new species of Trichobilharzia that was also found to cycle naturally through Au. tomentosa. Cercariae of a fourth species of Trichobilharzia were found in Au. tomentosa but the species remains unidentified.
针对新西兰瓦纳卡湖每年爆发的人体殖生性皮肤幼虫性皮炎 (HCD)，我们采集了鸭子和蜗牛，并对其进行了禽类血吸虫筛查。在 2009 年至 2017 年的调查期间，共发现了 4 种 Trichobilharzia。我们对标本进行了形态学和遗传学检查。在鸭子 Spatula rhynchotis 的内脏静脉中发现了一种已知分布于四大洲的 Trichobilharzia querquedulae，但蜗牛宿主仍不清楚。长尾尾蚴（即 Trichobilharzia longicauda (Macfarlane, 1944) Davis, 2006），被认为是瓦纳卡湖 HCD 的主要病原体，我们从鸭 Aythya novaeseelandiae 的内脏静脉中的成虫和蜗牛 Austropeplea tomentosa 的尾蚴中发现并重新描述了该尾蚴。从鸭 Aythya novaeseelandiae 的鼻腔黏膜中分离出一种新的 Trichobilharzia 种，该种也被发现通过 Au. tomentosa 自然循环。在 Au. tomentosa 中还发现了第四种 Trichobilharzia 的尾蚴，但该种仍未鉴定。
