Scientific news about the fishing sector, fish and their parasites
Pesca Internacional , 2014-12-02
PARASITE Project after a year and a half (ES)
The European project, leaded by the Institute of Marine Research (CSIC-IIM) from Vigo, has achieved some interesting results after a year and a half.
PARASITE Project in the last issue published by Eurofishmarket (EN)
Eurofishmarket is an Italian magazine specialized in marketing, training and legal services on seafood sector. It has recently published an issue about Anisakis, where PARASITE project and its objectives have been included.
Faro de Vigo, 2014-08-09
The first marine biobank, managed from Vigo, stores now more than 60.000 parasites (ES)
The biobank has stored during this first year more than 60.000 anisakid samples coming from 4.500 commercial fish species from the Atlantic, Mediterranean and Pacific.
The samples are carefully identified and stored at -80ºC.
Parasite Project, 2014-07-04
PARASITE project addresses the antigenicity of Anisakis after heating conditions used in canning process (EN)
Industrial conditions used in fish canning are, by far, enough to kill parasite larvae in terms of temperature and time. However, some Anisakis simplex allergens are very stable to high temperature.
To assess the antigenicity of Anisakis allergens after heating conditions used in canning process, PARASITE project researchers from the Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), Madrid Health System-SERMAS and the National Museum of Natural Sciences (MNCN-CSIC), have conducted an experimental trial. In the study, two tuna species, which are free of Anisakis infection in nature, have been artificially infected and subjected to temperature conditions similar to those used by the canning industry.After the experiment, it was found that samples had lost most of antigens, although some residual allergens remained after the heating conditions that could represent a health risk for those patients previously sensitized to thermally stable A. simplex allergens. Authors consider that further investigation is needed to assess the clinical relevance of these findings.
This work has been published in Journal of Science of Food and Agriculture.
PARASITE project, 2014-06-20
PARASITE project contributes to improve the specificity for the diagnosis of Anisakis sensitization (EN)
Recently, PARASITE project partners have proved the usefulness of the ratio between two target antibodies as a way to improve the specificity for the diagnosis of Anisakis sensitization.
The PARASITE Project is aimed at assessing risk posed by fish parasites using integrated tools along the whole production value chain. Anisakids, the common noun for nematodes belonging to the family of Anisakidae, represent the main parasitological risk for humans derived from fish consumption. Particularly, the species Anisakis simplex is known to cause severe reactions if raw or undercooked contaminated seafood is consumed. Moreover, A. simplex can provoke allergy in sensitized people.
Despite being an increasing problem, the diagnosis of Anisakis sensitization is still based on the detection of specific immunoglobulin E antibodies to parasite whole antigen. Immunoglobulin E antibodies (IgE) are a class of proteins formed by the immune system of mammals in reaction to certain foreign substances, and have the capacity to recognize them. However, this method demonstrated high cross-reactivity to other nematodes and microorganisms, i.e. the detection of the specific antibody can be triggered by the presence of other parasites different from Anisakis. Therefore, this technique leads to low specificity of the diagnostic tests, thus increasing the chances for wrong diagnosis.
Within the PARASITE project, the Servicio Madrileño de Salud-SERMAS, leads the research destined tocharacterize the cellular and humoralimmune responses caused by anisakids, which in turn will improve the diagnosticaccuracy. In a recent study, several immune parameters were analyzed in 999 patients and, as a result, it was concluded that the ratio between specific IgE antibodies to Anisakis and specific IgE antibodies to Ascaris (a common human parasite) improved remarkably the specificity of the diagnosis. Consequently, this ratio, that can be easily obtained using the available systems, will be useful for the correct diagnosis of hypersensitivity to Anisakis simplex.
This work has been published in Acta Tropica.