Fanny Panchana González- Escuela Superior Politecnica del Litoral
Fanny Panchana González
- Escuela Superior Politecnica del Litoral
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Publications (16)
Penaeus vannamei is the main species of shrimp farmed worldwide, and for Ecuador it is the first non-oil economic
sector. However, various pathogens, including white spot syndrome virus (WSSV), threaten the sustainability of
shrimp farming. P. vannamei larvae are susceptible to WSSV infection via vertical or horizontal transmission. To
decrease...
Acute hepatopancreatic necrosis (AHPND) is a severe bacterial disease affecting farmed shrimp. Although various pathogenic bacteria associated with AHPND-affected shrimp have been described, little is known about the bacterial signatures in the stomachs and intestines when the disease occurs naturally. In this study, we characterized the microbiome...
White spot syndrome virus (WSSV) is one of the most virulent pathogens of cultured penaeid shrimp. Several control strategies are used commonly to mitigate the economic losses caused by the pathogen, such as application of antiviral products at farm level. One of the most practical method for the screening of potential anti-WSSV products is through...
Acute hepatopancreatic necrosis disease (AHPND) has extended rapidly, causing alarming shrimp mortalities. Initially, the only known causative agent was Vibrio parahaemolyticus carrying a plasmid coding for the mortal toxins PirVP. Recently, it has been found that the plasmid and hence the disease, could be transferred among members of the Harveyi...
In Ecuador, the development and sustainability of the cultured white shrimp, Penaeus vannamei, has been threatened by the occurrence of several viral pathogens, Infectious hypodermal and haematopoietic necrosis virus (IHHNV) and White spot syndrome virus (WSSV) mainly. The aim of the present study was to evaluate the exposition of P. vannamei juven...
Debido a las variaciones ambientales los sistemas de cultivo constituyen
ambientes estresantes que favorecen la aparición y propagación de
enfermedades infecciosas. Las prácticas de manejo para controlarlas han
involucrado el uso de antibióticos y probióticos, muchas veces de forma
empírica. Nosotros proponemos hacer una revisión profunda de esas p...
In recent years, some Ecuadorian shrimp farmers have reported several cases of muscle necrosis in P. vannamei grow out cultures, associated to low mortalities at harvest. This abnormal condition is characterized by focal to extensive necrotic areas in striated tail muscle tissues, displaying a white, opaque appearance. Furthermore, histological ana...
En el presente trabajo se planteó la hipótesis de que las larvas de camarón, son portadoras del WSSV. La enfermedad se desarrollaría en los estanques en función de las condiciones ambientales, especialmente la temperatura. Se utilizaron dos temperaturas ( 24ºC y 31ºC) y -1,3-glucanos en dos niveles, presencia y ausencia en la alimentación Se emple...
Larvae and post-larvae of Penaeus vannamei (Boone) were submitted to primary challenge with infectious hypodermal and haematopoietic necrosis virus (IHHNV) or formalin-inactivated white spot syndrome virus (WSSV). Survival rate and viral load were evaluated after secondary per os challenge with WSSV at post-larval stage 45 (PL45). Only shrimp treat...
Mortalities of cultured shrimp, Penaeus vannamei (Boone), induced by white spot syndrome virus (WSSV) have occurred in Ecuador since May 1999. Three epidemiological surveys in Ecuadorian farms were carried out and showed an apparent association between lower temperature and increased mortality rates in commercial ponds. Infected animals showed a re...
In the present work the hypothesis that the shrimp larvae harbours WSSV at undetectables levels and that the White spot disease (WSD) is developed in ponds depending of the environmental conditions, mainly temperature. Two temperature were evaluated 24ºC and 31ºC as triggers in addition β-1,3-glucans were used at two levels, in the presence and abs...
La respuesta inmunitaria celular del camarón LV y su utilidad en el control de la enfermedad en estanques La respuesta inmunitaria celular del camarón LV y su utilidad en el control de la enfermedad en estanques
