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Identification of estuarine fish Dormitator latifrons as an intermediate host and Eleotris picta as a paratenic host for Gnathostoma binucleatum in Sinaloa, Mexico

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Abstract

Gnathostomosis is a typical fish-borne zoonotic parasitosis and is currently a serious public health issue in Mexico. Among several Gnathostoma species present in wild animals in Mexico, Gnathostoma binucleatum is the only proven species responsible for human diseases, and the advanced third stage larvae (AL3) of G. binucleatum have been found in over 20 species of fish in this country. In Sinaloa State, two fish species, Dormitator latifrons and Eleotris picta, were heavily contaminated with G. binucleatum AL3. When we analyzed the relationship between the size of the fish and the density of infection with G. binucleatum AL3, the distribution patterns of AL3 were markedly different between these two fish species. Apparent size-dependent accumulation was observed in E. picta but not in D. latifrons, suggesting that E. picta is a paratenic host whereas D. latifrons is a second intermediate host.

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Acknowledgements

The authors wish to thank Ignacio Osuna-Ramírez for his kind advice and assistance for statistical analyses. This work is supported in part by the following grants: Programa de Fomento y Apoyo a Proyectos de Investigacion No. PI-PROFAPI-06070 and Consejo Nacional de Ciencia y Tecnologia No. P48161-M.

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Correspondence to Yukifumi Nawa.

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Díaz-Camacho, S.P., de la Cruz-Otero, M.d.C., Zazueta-Ramos, M.L. et al. Identification of estuarine fish Dormitator latifrons as an intermediate host and Eleotris picta as a paratenic host for Gnathostoma binucleatum in Sinaloa, Mexico. Parasitol Res 103, 1421–1425 (2008). https://doi.org/10.1007/s00436-008-1151-9

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Keywords

  • Intermediate Host
  • Fish Host
  • ITS2 Sequence
  • Small Size Group
  • Paratenic Host