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The Asian fish tapeworm Schyzocotyle acheilognathi is widespread in baitfish retail stores in Michigan, USA.

ABSTRACT: The Asian fish tapeworm Schyzocotyle acheilognathi (Yamaguti, 1934) is an important fish pathogen because of its wide range of intermediate and definitive hosts and its pathological consequences. This study was designed to determine if baitfish are a likely vector contributing to the expansion of the invasive Asian fish tapeworm.We collected live baitfish for examination from 78 retail stores in Michigan between September 2015 and June 2016. A total of 5400 baitfish (90 lots, 60 fish/lot) were examined, including 42 emerald shiners [Notropis atherinoides (Rafinesque, 1818)] lots, 30 fathead minnow [Pimephales promelas (Rafinesque, 1820)] lots, 11 golden shiners [Notemigonus crysoleucas (Mitchill, 1814)] lots, 3 sand shiners [Notropis stramineus (Cope, 1865)] lots, 1 lot each of spottail shiners [Notropis hudsonius (Clinton, 1824)], Northern redbelly dace [Phoxinus eos (Cope, 1861)], and blacknose dace [Rhinichthys atratulus (Hermann, 1804)] and 1 lot of mixed two species: weed shiners [Notropis texanus (Girard, 1856)] and sand shiners.Based on its scolex and strobilar morphology combined with gene sequence analysis, S. acheilognathi was only found in emerald shiners, golden shiners and sand shiners. The mean within lot prevalence and abundance of infection was highest in emerald shiners (20.3?±?14.0 and 1.15?±?1.34), followed by golden shiners (8.3?±?10.7 and 0.89?±?1.27) and sand shiners (1.3?±?2.6 and 0.02?±?0.05). However, the mean intensity of S. acheilognathi in emerald shiners was lower (4.3?±?2.6) than that of golden shiners (6.6?±?6.7). S. acheilognathi-infected fish exhibited enlargement of the abdomen, distension of the intestinal wall, and intestinal occlusion and hemorrhage. This finding suggests that live baitfish are a likely vector by which the invasive Asian tapeworm's range is expanding.

SUBMITTER: Boonthai T

PROVIDER: S-EPMC5741914 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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The Asian fish tapeworm Schyzocotyle acheilognathi is widespread in baitfish retail stores in Michigan, USA.

Boonthai Traimat T Herbst Seth J SJ Whelan Gary E GE Van Deuren Michelle Gunn MG Loch Thomas P TP Faisal Mohamed M

Parasites & vectors 20171222 1

<h4>Background</h4>The Asian fish tapeworm Schyzocotyle acheilognathi (Yamaguti, 1934) is an important fish pathogen because of its wide range of intermediate and definitive hosts and its pathological consequences. This study was designed to determine if baitfish are a likely vector contributing to the expansion of the invasive Asian fish tapeworm.<h4>Results</h4>We collected live baitfish for examination from 78 retail stores in Michigan between September 2015 and June 2016. A total of 5400 bai ...[more]

PMID: 29273064

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Project description:BackgroundThe consumer nutrition environment has been conceptualised as in-store environmental factors that influence food shopping habits. More healthful in-store environments could be characterised as those which promote healthful food choices such as selling good quality healthy foods or placing them in prominent locations to prompt purchasing. Research measuring the full-range of in-store environmental factors concurrently is limited.PurposeTo develop a summary score of 'healthfulness' composed of nine in-store factors that influence food shopping behaviour, and to assess this score by store type and neighbourhood deprivation.MethodsA cross-sectional survey of 601 retail food stores, including supermarkets, grocery stores and convenience stores, was completed in Hampshire, United Kingdom between July 2010 and June 2011. The survey measured nine variables (variety, price, quality, promotions, shelf placement, store placement, nutrition information, healthier alternatives and single fruit sale) to assess the healthfulness of retail food stores on seven healthy and five less healthy foods that are markers of diet quality. Four steps were completed to create nine individual variable scores and another three to create an overall score of healthfulness for each store.ResultsAnalysis of variance showed strong evidence of a difference in overall healthfulness by store type (p <?0.001). Large and premium supermarkets offered the most healthful shopping environments for consumers. Discount supermarkets, 'world', convenience and petrol stores offered less healthful environments to consumers however there was variation across the healthfulness spectrum. No relationship between overall healthfulness and neighbourhood deprivation was observed (p =?0.1).ConclusionsA new composite measure of nine variables that can influence food choices was developed to provide an overall assessment of the healthfulness of retail food stores. This composite score could be useful in future research to measure the relationship between main food store and quality of diet, and to evaluate the effects of multi-component food environment interventions.

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The Asian fish tapeworm Schyzocotyle acheilognathi is widespread in baitfish retail stores in Michigan, USA.

Publications

The Asian fish tapeworm Schyzocotyle acheilognathi is widespread in baitfish retail stores in Michigan, USA.

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