Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture ponds

The present study was done in order to identify the fungus invading some of the supralittoral ponds used for shrimp aquaculture in the CIBNOR facilities in La Paz, Baja California Sur (BCS), México during the summer season. From the walls and bottoms of the ponds, two strains of Geotrichum spp. were...

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Autores principales:	Ochoa,José Luis, Ochoa-Alvarez,Norma, Guzmán-Murillo,Maria Antonia, Hernandez,Sergio, Ascencio,Felipe
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2015
Materias:	Geotrichum spp Fusarium solani Litopenaeus vannamei mycotoxins extracellular enzymes aquaculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000400014
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spelling	oai:scielo:S0718-560X20150004000142015-12-04Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture pondsOchoa,José LuisOchoa-Alvarez,NormaGuzmán-Murillo,Maria AntoniaHernandez,SergioAscencio,Felipe Geotrichum spp Fusarium solani Litopenaeus vannamei mycotoxins extracellular enzymes aquaculture The present study was done in order to identify the fungus invading some of the supralittoral ponds used for shrimp aquaculture in the CIBNOR facilities in La Paz, Baja California Sur (BCS), México during the summer season. From the walls and bottoms of the ponds, two strains of Geotrichum spp. were isolated and morphologically identified. Fungal adhesion towards hemocytes and primary cultures of various white shrimp (Litopeneaus vannamei) tissues (gill, tegument, and gut) was analyzed to determine infectivity. Extracellular protease, lipase, and amylase activity were evaluated as virulence factors. Survival of shrimp post-larvae (PL8) exposed to fungal culture supernatant or to their filaments was also investigated. The results showed that shrimp tegument cells and hemocytes were very susceptible to Geotrichum spp. invasion, and that this fungus provokes great mortality of post-larvae. Hence, Geotrichum spp. could be considered an opportunistic pathogen that might represent a serious health risk to shrimp in culture.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.43 n.4 20152015-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000400014en10.3856/vol43-issue4-fulltext-14
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Geotrichum spp Fusarium solani Litopenaeus vannamei mycotoxins extracellular enzymes aquaculture
spellingShingle	Geotrichum spp Fusarium solani Litopenaeus vannamei mycotoxins extracellular enzymes aquaculture Ochoa,José Luis Ochoa-Alvarez,Norma Guzmán-Murillo,Maria Antonia Hernandez,Sergio Ascencio,Felipe Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture ponds
description	The present study was done in order to identify the fungus invading some of the supralittoral ponds used for shrimp aquaculture in the CIBNOR facilities in La Paz, Baja California Sur (BCS), México during the summer season. From the walls and bottoms of the ponds, two strains of Geotrichum spp. were isolated and morphologically identified. Fungal adhesion towards hemocytes and primary cultures of various white shrimp (Litopeneaus vannamei) tissues (gill, tegument, and gut) was analyzed to determine infectivity. Extracellular protease, lipase, and amylase activity were evaluated as virulence factors. Survival of shrimp post-larvae (PL8) exposed to fungal culture supernatant or to their filaments was also investigated. The results showed that shrimp tegument cells and hemocytes were very susceptible to Geotrichum spp. invasion, and that this fungus provokes great mortality of post-larvae. Hence, Geotrichum spp. could be considered an opportunistic pathogen that might represent a serious health risk to shrimp in culture.
author	Ochoa,José Luis Ochoa-Alvarez,Norma Guzmán-Murillo,Maria Antonia Hernandez,Sergio Ascencio,Felipe
author_facet	Ochoa,José Luis Ochoa-Alvarez,Norma Guzmán-Murillo,Maria Antonia Hernandez,Sergio Ascencio,Felipe
author_sort	Ochoa,José Luis
title	Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture ponds
title_short	Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture ponds
title_full	Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture ponds
title_fullStr	Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture ponds
title_full_unstemmed	Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture ponds
title_sort	isolation and risk assessment of geotrichum spp. in the white shrimp (litopenaeus vannamei boone, 1931) from culture ponds
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000400014
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Isolation and risk assessment of Geotrichum spp. in the white shrimp (Litopenaeus vannamei Boone, 1931) from culture ponds

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