{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T02:43:37Z","timestamp":1777430617166,"version":"3.51.4"},"reference-count":44,"publisher":"American Society of Tropical Medicine and Hygiene","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2015,7,8]]},"abstract":"<jats:p>Seasonal changes play roles in the transmission success of fish-borne zoonotic trematodes (FZT). This study examined the seasonal transmission patterns of <jats:italic>Opisthorchis viverrini<\/jats:italic> sensu lato (s.l.) and a virgulate cercaria (family Lecithodendriidae) in the snail intermediate host, <jats:italic>Bithynia siamensis goniomphalos<\/jats:italic> in northeast Thailand. Snail samples were collected monthly during the rainy, cool, and hot seasons during 2012\u20132013 to determine the prevalence and intensity of larval trematode infections. The prevalence of <jats:italic>O. viverrini<\/jats:italic> s.l. varied significantly with season, being 0.31%, 1.05%, and 0.37% in the rainy, cool, and hot seasons, respectively (<jats:italic>P<\/jats:italic> &lt; 0.05). Similarly, the prevalence of virgulate cercariae was 3.11%, 6.80%, and 1.64% in the rainy, cool, and hot seasons, respectively (<jats:italic>P<\/jats:italic> &lt; 0.05). The intensity of larval trematode infections also varied between seasons and peaked in the hot season (<jats:italic>P<\/jats:italic> &lt; 0.05) in both species. The snails infected with <jats:italic>O. viverrini<\/jats:italic> s.l. were significantly smaller (<jats:italic>P<\/jats:italic> &lt; 0.05) and those infected with virgulate cercariae were significantly larger (<jats:italic>P<\/jats:italic> &lt; 0.05) than uninfected snails. Seasonal variation and the different sizes of <jats:italic>B. s. goniomphalos<\/jats:italic> parasitized by <jats:italic>O. viverrini<\/jats:italic> s.l. and virgulate trematodes indicate complex host\u2013parasite interactions with important implications for the epidemiology of <jats:italic>O. viverrini<\/jats:italic> s.l.<\/jats:p>","DOI":"10.4269\/ajtmh.14-0639","type":"journal-article","created":{"date-parts":[[2015,4,28]],"date-time":"2015-04-28T02:21:46Z","timestamp":1430187706000},"page":"87-93","source":"Crossref","is-referenced-by-count":24,"title":["Seasonal Transmission of Opisthorchis viverrini sensu lato and a Lecithodendriid Trematode Species in Bithynia siamensis goniomphalos Snails in Northeast Thailand"],"prefix":"10.4269","volume":"93","author":[{"given":"Jutamas","family":"Namsanor","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paiboon","family":"Sithithaworn","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kulthida","family":"Kopolrat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nadda","family":"Kiatsopit","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Opal","family":"Pitaksakulrat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Smarn","family":"Tesana","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ross H.","family":"Andrews","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Trevor N.","family":"Petney","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2795","reference":[{"key":"R1","series-title":"Parasitol Int","first-page":"10","article-title":"The current status of opisthorchiasis and clonorchiasis in the Mekong Basin","volume":"61","author":"Sithithaworn","year":"2012"},{"key":"R2","series-title":"Int J Parasitol","first-page":"695","article-title":"Evidence of a species complex within the food-borne trematode Opisthorchis viverrini and possible co-evolution with their first intermediate hosts","volume":"37","author":"Saijuntha","year":"2007"},{"key":"R3","series-title":"J Parasitol","first-page":"1307","article-title":"Biological variation within Opisthorchis viverrini sensu lato in Thailand and Lao PDR","volume":"95","author":"Laoprom","year":"2009"},{"key":"R4","series-title":"Acta Trop","first-page":"158","article-title":"Opisthorchiasis and Opisthorchis-associated cholangiocarcinoma in Thailand and 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