Ir al menú de navegación principal Ir al contenido principal Ir al pie de página del sitio
##common.pageHeaderLogo.altText##

ARTÍCULOS

Vol. 11 Núm. 1 (2022)

Ascocotyle patagoniensis (Digenea: Heterophyidae) from the silverside Odontesthes argentinensis (Atherinopsidae). The bulbus arteriosus as an optimal ecological niche for this parasite species

Enviado
mayo 12, 2024
Publicado
2022-04-30

Resumen

Several biological and morphological features of the parasite and their hosts may be determinants for the dimensions of the helminth niche. Helminths cause tissue damage to their hosts by either mechanical action or secretion of toxic substances. Metacercariae of the Ascocotyle genus encyst in different tissues on their fish hosts. In this work, metacercariae present inside the bulbus arteriosus from the silverside Odontesthes argentinensis on the coast of Bahia Blanca, Buenos Aires province, were identified as Ascocotyle (A.) patagoniensis based on morphological and molecular analyses. In addition, parasitic indices are related to the fish condition factor, and the host inflammatory response to the presence of metacercariae is described. The prevalence of A. (A.) patagoniensis in male silversides was 100% (n= 15), and 92% (n= 25) in females. Most of bulbs presented between 20 and 40 cysts. Six individuals harbored more than 120 parasites and the maximum recorded value was 226 metacercariae in a single bulb. All metacercariae were alive and encysted at the study time. Each cyst contained only one metacercariae. The bulb distal area towards ventral aorta was the most densely parasitized and probably the site where infective cercariae first arrive. A discrete or almost inapparent cellular inflammatory infiltrate surrounds the metacercariae forming a thin connective tissue envelope weakly supporting cysts adhered to the internal tunic of the bulb. The absence of coronary irrigation both in the tunica media and the internal trabecular lamina of the bulb could explain the low fish immune reaction. It is suggested that the silverside bulbus arteriosus represents an optimal ecological niche for A. (A.) patagoniensis metacercariae.

Citas

  1. Abdelkhalik, A.T., Ali, H. A., Aqili, M. I. and Haroun, S. H. (2021). Biodiversity and efficiency of fish helminthes parasites as a possible bioindicator of water quality in Jazan coastal area, Saudi Arabia. Egyptian Journal of Aquatic Biology & Fisheries 25 (1): 865-884
  2. Bush, A., Lafferty, K., Lotz, J. and Shostak, A. (1997). Parasitology meets ecology on its own terms: Magolis et al. revisited. Journal of Parasitology, 83, 575-583.
  3. Coleman, F. C. and Travis, J. (1998). Phenology of recruitment and infection patterns of Ascocotyle pachycystis, a digenean parasite in the sheepshead minnow, Cyprinodon variegatus. Environmental Biology of Fishes, 51, 87-96.
  4. Emerique Simões, S. B., Santos Barbosa, H. and Portes Santos, C. (2010). The life cycle of Ascocotyle (Phagicola) longa (Digenea: Heterophyidae), a causative agent of fish-borne trematodosis. Acta Tropica 113: 226-233
  5. Hernández-Orts, J. S., Montero, F. E., Crespo, E. A., García, N. A., Raga, J. A. and Aznar, F. J. (2012). A new species of Ascocotyle (Trematoda: Heterophyidae) from the South American sea lion, Otaria flavescens, off Patagonia, Argentina. Journal of Parasitology, 98, 810–816.
  6. Hernández-Orts, J. S., Georgieva, S., Landete, D. N. and Scholz, T. (2019). Heterophyid trematodes (Digenea) from penguins: a new species of Ascocotyle Looss, 1899, first description of metacercaria of Ascocotyle (A.) patagoniensis Hernández-Orts, Montero, Crespo, García, Raga and Aznar, 2012, and first molecular data. International Journal for Parasitology: Parasites and Wildlife, 8, 94–105.
  7. Hicks, T. and Steele, E. (2003). Histological effect of Ascocotyle tenuicollis (Digenea: Heterophyidae) metacercarial infection on the heart of Fundulus heteroclitus (Teleostei: Cyprinodontidae). Journal of the South Carolina Academy of Science, 1, 10-18.
  8. Levy, E., Canel, D., Rossin, M.A., Hernández-Orts, J.S., Gonzalez-Castro, M. and Timi, J.T. (2019). Parasites as indicators of fish population structure at two different geographical scales in contrasting coastal environments of the south-western Atlantic. Estuarine, Coastal and Shelf Science, 229, 1-9.
  9. Littlewood, D. T. J., Curini-Galleti, M. and Herniou, E. A. (2000). The interrelationships of Proseriata (Platyhelminthes: Seriata) tested with molecules and morphology. Molecular Phylogenetics and Evolution, 16, 449-466.
  10. Malek, E.A. (1980). Snail-transmitted parasitic diseases. Vol 2. Boca Raton: CRC Press.
  11. McSorley, H. J. and Maizels, R. M. (2013). Helminth infections and host immune regulation. Clinical Microbiology Review, 25, 585–608.
  12. Montes, M. M., Marcotegui, P. S. and Martorelli, S. R. (2013). Digeneos parásitos de juveniles de Mugil liza (Pisces: Mugilidae) en la Bahía de Samborombón, Argentina, con el reporte de metacercarias zoonóticas de Ascocotyle (Phagicola) longa. Revista Argentina de Parasitología 1(2): 68-85
  13. Morales, G. and Pino, L. A. (1987). Parasitología Cuantitativa. Fundación Fondo Editorial Acta Científica Venezolana, Caracas, Venezuela.
  14. Orecka-Grabda, T. (1991). Haemato- and histopathological changes in the whitefish (Coregonus albula Linn.) invaded by metacercariae of Cotylurus erraticus (Syn. Ichthyocotylurus) (Rudolphi, 1809). Fish Pathology, 221, 3-19.
  15. Ostrowski de Núñez, M. (1974). Estudio sobre estados larvales de trematodes digeneos de peces Cyprinodontiformes. Physis, 33, 45-61.
  16. Prasanna Vankara, A. and Chikkam, V. (2013). Histopathology of heart of freshwater spiny eel, Mastacembelus armatus naturally infected with Tetracotyle metacercaria (Trematode: Strigeidae). Research Journal of Parasitology, 8, 45-54.
  17. Rhode, K. (1994). Niche restriction in parasites: proximate and ultimate causes. Parasitology, 109, 69-84.
  18. Santoro M, Mattiucci S, Cipriani P, Bellisario B, Romanelli F, Cimmaruta, R. and Nascetti, G. (2014). Parasite communities of icefish (Chionodraco hamatus) in the Ross Sea (Antarctica): Influence of the host sex on the helminth infracommunity structure. PLoS ONE 9(2): e88876. doi:10.1371/journal.pone.0088876.
  19. Scholz, T. (1999). Taxonomic study of Ascocotyle (Phagicola) longa Ranson, 1920 (Digenea: Heterophyidae) and related taxa. Systematic Parasitology, 43 147–158.
  20. Scholz, T., Aguirre-Macedo, M.L. and Salgado-Maldonado, G. (2001). Trematodes of the family Heterophyidae (Digenea) in Mexico: a review of species and new host and geographical records. Journal of Natural History, 35, 1733-1772.
  21. Sogandares-Bernal, F. and Lumsden, R. D. (1963). The generic status of the heterophyid trematodes of the Ascocotyle complex, including notes of the systematics and biology of Ascocotyle angrense Travassos, 1916. Journal of Parasitology, 49, 264-274.
  22. Tkach, V. V., Littlewood, D. T. J., Olson, P. D., Kinsella, J. M. and Swiderski, Z. (2003). Molecular phylogenetics analysis of the Microphalloidea Ward, 1901 (Trematoda: Digenea). Systematic Parasitology, 56, 1-15.
  23. Watson, J. J., Pike, A. W. and Priede, I. G. (1992). Cardiac pathology associated with the infection of Onchorhynchus mykiss Walbaum with Apatemon gracilis Rud. 1819. Journal of Fish Biology 41, 163-167.

Descargas

Los datos de descargas todavía no están disponibles.