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Photo courtesy from IFOP

World's leading sea lice research congress

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Friday, May 13, 2022, 04:10 (GMT + 9)

On May 10, Dr. Margarita González presented two papers at the XIII version of Sealice Conference 2022, which takes place in Törshavn, Faroe Islands, she explained "these are papers derived from the permanent research program of IFOP called Determination and Surveillance of the Resistance of Caligus rogercresseyi to Antiparasitics applied in National Salmon Farming, which is carried out in the Department of hydrobiological health of IFOP”.
 
She spoke about the susceptibility profiles of Caligus against different conditions of temperature and light.
 
 
 
 
Dr. Margarita González commented “The oral presentation was intended to explain the findings of the study that aimed to evaluate the susceptibility profile of a parasitic variant highly susceptible to azamethiphos, cultivated in IFOP, which was exposed to different post-exposure incubation temperatures. This study derived from an internal technical consultation and that we wanted to resolve, and the response indicates that we can expand our geographical range in terms of the application of bioassays in remote places without greater scientific equipment.

The main result is that two major responses were obtained, one technical and the other biological. The technique refers to the fact that we can carry out susceptibility bioassays in temperature ranges from 12 to 15 degrees Celsius and that we do not require lighting, expanding our capacity to carry out bioassays in places that do not have specialized equipment. This helps the execution of the permanent program that we have. The biological response is that we were able to determine that the same parasitic variant can vary the susceptibility profile depending on the temperature to which it is exposed, a response also observed in data derived from bioassays carried out on parasitic variants from the field”.
 
Foto gentileza de IFOP 
 
Regarding the poster work, the results derived from surveillance of susceptibility to azamethiphos and deltamethrin in a sentinel center and which is part of the previously indicated program were presented. The results indicate that the parasites present in the sentinel center have lost susceptibility to both antiparasitics over time, which helps us to argue the relevance of considering sentinel centers in a program of the magnitude that we have. And that in turn allows representing a particular geographical area.
 
“For me it marks a milestone and at the same time a recognition, since the fact that they have accepted two works, one as a poster and the other as a presentation, implies that our research is on the right track and that the information derived from these experiments is useful for the scientific community” concluded González.

Source: Instituto de Fomento Pesquero

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