Data/hora: 10/06/2024 16:21:23

Provedor de dados: 	5	
País: 	France	
Título: 	Le système immunitaire du bar Dicentrarchus labrax. Immunoglobulines, cellules productrices d'immunoglobulines, ontogenèse applications à une pathologie virale néonatale	
Autores: 	Breuil, Gilles.	
Data: 	1997-05-13	
Ano: 	1997	
Palavras-chave: 	Egg; Cytometry; Immunity system; Larvae; Immunoglobulin; Nodavirus; Dicentrarchus labrax; Hatchery; Ontogenese; Cytometrie; Immunoglobuline; Nodavirus; Oeuf; Larve; Nurserie; Dicentrarchus labrax.	
Resumo: 	The sea bass, Dicentrarchus labrax, has been subjected to intensive aquaculture on the Mediterranean cost for ten years. Marine fish hatcheries are key factors in the aquaculture field, and face different pathologies, especially one of viral origin (nodavirus) that could challenge their feasibility. Consequently, we have tried to provide some data on larvae and spawning stocks.   Firstly, we have studied the immunoglobulins, components of the specific humoral immunity, and their role as antibodies. On adult basses, these immunoglobulins are tetrameric molecules with high molecular weight (850 kD), made of heavy (H) - 80 kD and light (L) - 26 kD chains. In the eggs, simplest forms such as monomeric or dimeric are brought to the fore; they are located under the chorionic membrane.   Secondly, we have studied the development of the immunity system on larvae, preparing IgM assays with ELISA method, the study on the organogenesis of the main lymphoid organs, and using flow cytometry for the ontogenesis of IgM producing cell. Based on this experience, we can propose a date for the immunocompetence onset of the bar, i.e. from the 54th day of the hatchery phase.   Finally, we made the most of these different results to study a viral pathology (nodavirus) in spawners and larvae. We defined an experimental contamination model for larvae and eggs, and we highlighted that eggs born from vaccinated hen fishes were protected against the nodavirus.	
Tipo: 	Text	
Idioma: 	Francês	
Identificador: 	http://archimer.ifremer.fr/doc/1997/these-1265.pdf	
Editor: 	Université de Montpellier II	
Relação: 	http://archimer.ifremer.fr/doc/00000/1265/	
Formato: 	application/pdf