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首页> 外文期刊>Acta tropica: Journal of Biomedical Sciences >Effects of aestivation on survival of Bithynia siamensis goniomphalos snails and the infection of Opisthorchis viverrini in the irrigation area of wet- and dry-season rice paddy
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Effects of aestivation on survival of Bithynia siamensis goniomphalos snails and the infection of Opisthorchis viverrini in the irrigation area of wet- and dry-season rice paddy

机译：湿热季稻灌水灌溉区肉桂瘤脑蜗牛蜗牛蜗牛蜗牛蜗牛生存的影响

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摘要

The snail Bithynia siamensis goniomphalos acts as the first intermediate host of the human liver fluke, Opisthorchis viverrini, a major cause of cholangiocarcinoma in Northeast Thailand. In this study, we investigated host-parasite interactions in wet- and dry-season rice paddy plantation. The snails that aestivated through 4-month-dried period after rice harvest had average mortality rate of 36.45% and monthly increasing from 17.76% to 54.57%. Surprisingly, at depths greater than 5 cm experienced a higher mortality rate than upper level. Average mortality rate at the depth more than 5 cm, was 42.97%. In the initial month of aestivation, mortality rate of 0-5 and 5-10 cm depth was 9.13% and 26.39% then increase to 57.58% and 51.97%, respectively in the last 4th month. The average prevalence O. viverrini infection in snails during the study period was 0.44%. The highest prevalence of O. viverrini infection was found in the cool dry and wet season. The odds of O. viverrini infection in female snails and large snails were higher relative to male snails and medium-sized snails. The physicochemical factors involved in increased prevalence of O. viverrini infection in snail hosts were mean daily air temperature and average monthly rainfall. Short aestivation period made lower mortality in irrigation area than the previous report of non-irrigation area, that is, the aestivation is one of snail population control.
机译：蜗牛Bithynia Siamensis Goniomphalos是人肝氟克，Opisthorchis Viverrini的第一个中间宿主，泰国东北部胆管癌的主要原因。在这项研究中，我们研究了湿季稻田种植园中的宿主寄生虫相互作用。米养活后4个月干燥期间的蜗牛平均死亡率为36.45％，每月增加17.76％至54.57％。令人惊讶的是，在大于5厘米的深度比上层的深度较高。景深的平均死亡率超过5厘米，为42.97％。在最初的审美月份，死亡率为0-5和5-10厘米的深度为9.13％，26.39％分别在过去的第四个月内增加到57.58％和51.97％。研究期间蜗牛的平均患病率O.Viverrini感染为0.44％。在凉爽的干燥和潮湿的季节中发现了O.Viverrini感染的最高患病率。 O. Viverrini感染在母蜗牛和大蜗牛中的几率相对于雄性蜗牛和中型蜗牛更高。蜗牛宿主中O. Viverrini感染增加的患病率增加的物理化学因素是每日空气温度和平均每月降雨。短暂的灌溉面积较低的死亡率比上一篇关于非灌溉面积的报告较低的死亡率，也就是说，吸引是蜗牛人口控制之一。

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