Dispersion of Echinococcus granulosus eggs from infected dogs under natural conditions in Patagonia, Argentina

Cystic echinococcosis caused by Echinococcus granulosus is a major zoonosis of public health significance in the Patagonian region of Argentina. This investigation sought to test the hypothesis that the persistence and dispersion of the parasite eggs can be explained by physical and meteorological p...

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Autores principales: Sánchez Thevenet, P., Alvarez, Héctor M., Torrecillas, Claudia Beatriz, Jensen, Oscar, Basualdo Farjat, Juan Ángel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Médicas
Biología
Argentina
Echinococcus granulosus
eggs
dog infection burden
dispersion
landscape
Patagonia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/139325
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-139325
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Médicas
Biología
Argentina
Echinococcus granulosus
eggs
dog infection burden
dispersion
landscape
Patagonia
spellingShingle Ciencias Médicas
Biología
Argentina
Echinococcus granulosus
eggs
dog infection burden
dispersion
landscape
Patagonia
Sánchez Thevenet, P.
Alvarez, Héctor M.
Torrecillas, Claudia Beatriz
Jensen, Oscar
Basualdo Farjat, Juan Ángel
Dispersion of Echinococcus granulosus eggs from infected dogs under natural conditions in Patagonia, Argentina
topic_facet Ciencias Médicas
Biología
Argentina
Echinococcus granulosus
eggs
dog infection burden
dispersion
landscape
Patagonia
description Cystic echinococcosis caused by Echinococcus granulosus is a major zoonosis of public health significance in the Patagonian region of Argentina. This investigation sought to test the hypothesis that the persistence and dispersion of the parasite eggs can be explained by physical and meteorological parameters along with final host infection and behaviour. This observational study was carried out over a five-year period within an enclosure where two dogs harbouring a worm burden ranging from 100 to 1000 mature adult E. granulosus, as well as two uninfected dogs, had previously been kept for six months. Environmental canine faeces, topsoil, pond water, and sediment samples were examined to control for the presence of eggs and coproantigens of the parasite using microscope-based techniques and copro-ELISA plus copro-Western Blot tests. The parasite eggs were detected up to 41 months later in faeces from infected dogs, soil and sediment, and coproantigen tests remained positive for up to 70 months in faeces. Overall, parasite eggs were found within a maximum distance of 115 m from the contaminated dog faeces deposition site. Our findings indicate that under Patagonian environmental conditions, egg persistence and dispersion seem to be related to the worm burden and habits of the infected dog, to prevailing wind direction and to the existence of low bushes as well as natural bodies of water. The present study is the first to provide direct evidence of interaction between bioclimatic conditions and E. granulosus egg dispersion under Patagonian field conditions.
format Articulo
Articulo
author Sánchez Thevenet, P.
Alvarez, Héctor M.
Torrecillas, Claudia Beatriz
Jensen, Oscar
Basualdo Farjat, Juan Ángel
author_facet Sánchez Thevenet, P.
Alvarez, Héctor M.
Torrecillas, Claudia Beatriz
Jensen, Oscar
Basualdo Farjat, Juan Ángel
author_sort Sánchez Thevenet, P.
title Dispersion of Echinococcus granulosus eggs from infected dogs under natural conditions in Patagonia, Argentina
title_short Dispersion of Echinococcus granulosus eggs from infected dogs under natural conditions in Patagonia, Argentina
title_full Dispersion of Echinococcus granulosus eggs from infected dogs under natural conditions in Patagonia, Argentina
title_fullStr Dispersion of Echinococcus granulosus eggs from infected dogs under natural conditions in Patagonia, Argentina
title_full_unstemmed Dispersion of Echinococcus granulosus eggs from infected dogs under natural conditions in Patagonia, Argentina
title_sort dispersion of echinococcus granulosus eggs from infected dogs under natural conditions in patagonia, argentina
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/139325
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