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Invasive slug

R Rodriguez1,2, A S S Sandri1, S M Porto1

  • 1Universidade de Passo Fundo, Passo Fundo, RS, Brasil.

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Summary
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The invasive Chinese slug, Meghimatium pictum, is a new intermediate host for Angiostrongylus costaricensis in Brazil. This finding highlights potential risks associated with consuming contaminated produce, like grapes.

Keywords:
AngiostrongylusMeghimatium pictumabdominal angiostrongyliasishuman infection

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Area of Science:

  • Parasitology
  • Veterinary Entomology
  • Public Health

Background:

  • Angiostrongyliasis is a parasitic disease caused by Angiostrongylus nematodes.
  • Molluscs are known intermediate hosts for Angiostrongylus species.
  • Abdominal angiostrongyliasis has been diagnosed in a grape farmer in southern Brazil.

Purpose of the Study:

  • To investigate molluscs in southern Brazil as potential intermediate hosts for Angiostrongylus costaricensis.
  • To identify the species of slug involved in local transmission cycles.
  • To assess the role of Meghimatium pictum in the epidemiology of abdominal angiostrongyliasis.

Main Methods:

  • Nocturnal surveys were conducted to collect slugs in the affected area.
  • Collected slugs were identified morphologically and taxonomically.
  • Larval stages of Angiostrongylus costaricensis were isolated from slugs.
  • Experimental infections in mice were performed using larvae from identified slugs.

Main Results:

  • 245 specimens of the invasive Chinese slug, Meghimatium pictum, were collected.
  • Larvae of Angiostrongylus costaricensis were recovered from 11 (4.5%) of the collected slugs.
  • This study confirms M. pictum as an intermediate host for A. costaricensis.
  • Slugs were frequently found on grape plants, suggesting a link to grape cultivation.

Conclusions:

  • Meghimatium pictum is identified as a novel intermediate host for Angiostrongylus costaricensis in Brazil.
  • The prevalence of infection in M. pictum indicates its significant role in local parasite transmission.
  • Consumption of contaminated produce, such as grapes, may be a route of human infection.