Molecular identification of the broodsacs from Leucochloridium passeri (Digenea: Leucochloridiidae) with a review of Leucochloridium species records in Taiwan.
Parasitology international(2022)
Abstract
Leucochloridium spp. have been established in Taiwan since the 1930s, with five species listed: Leucochloridium turdi, Leucochloridium passeri, Leucochloridium muscularae, Leucochloridium sime, and Leucochloridium taiwanese listed until now. Because of the similar morphology among the adults of the Leucochloridiidae family, the taxonomic status of most of them should be reconsidered. Broodsacs are the most distinct characteristic shared by Leucochloridium flukes, and L. passeri is, by far, the only one whose broodsacs have been described. In this study, broodsacs collected from an infected Succinea sp. (amber snails) in Taiwan were morphologically compared to previous descriptions and sequenced using both nuclear and mitochondrial genetic markers for identification. Our samples resembled broodsacs of L. passeri previously described in northern Taiwan and those recently collected in Okinawa, Japan. The conspecific status of the broodsacs collected in Taiwan and Okinawa was supported by the identical DNA sequences identified in this study. Broodsacs have rarely been reported in tropical and subtropical regions, although some Leucochloridium spp. have been recorded. In such cases, genetic markers will be crucial to link Leucochloridium broodsacs in snails (intermediate host) with their corresponding adult stage in birds (definitive host).
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