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Titolo:
Stress and stress-induced neuroendocrine changes increase the susceptibility of juvenile oysters (Crassostrea gigas) to Vibrio splendidus
Autore:
Lacoste, A; Jalabert, F; Malham, SK; Cueff, A; Poulet, SA;
Indirizzi:
Univ Paris 06, Stn Biol Roscoff, CNRS, F-29682 Roscoff, France Univ Paris 06 Roscoff France F-29682 coff, CNRS, F-29682 Roscoff, France
Titolo Testata:
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
fascicolo: 5, volume: 67, anno: 2001,
pagine: 2304 - 2309
SICI:
0099-2240(200105)67:5<2304:SASNCI>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERKINSUS-MARINUS; COAST OYSTERS; VIRGINICA; VULNIFICUS; HEMOCYTES; IRON; NOREPINEPHRINE; TRANSFERRIN; LACTOFERRIN; ASSOCIATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Poulet, SA Univ Paris 06, Stn Biol Roscoff, CNRS, Pl Georges Teissier, F-29682 Roscoff, France Univ Paris 06 Pl Georges Teissier Roscoff France F-29682 rance
Citazione:
A. Lacoste et al., "Stress and stress-induced neuroendocrine changes increase the susceptibility of juvenile oysters (Crassostrea gigas) to Vibrio splendidus", APPL ENVIR, 67(5), 2001, pp. 2304-2309

Abstract

Oysters are permanently exposed to various microbes, and their defense system is continuously solicited to prevent accumulation of invading and pathogenic organisms. Therefore, impairment of the animal's defense system usually results in mass mortalities in cultured oyster stocks or increased bacterial loads in food products intended for human consumption. In the present study, experiments were conducted to examine the effects of stress on the juvenile oyster's resistance to the oyster pathogen Vibrio splendidus. Oysters (Crassostrea gigas) were challenged with a low dose of a pathogenic V. splendidus strain and subjected Co a mechanical stress V days later. Both mortality and V. splendidus loads increased in stressed oysters, whereas theyremained low in unstressed animals, Injection of noradrenaline or adrenocorticotropic hormone, two key components of the oyster neuroendocrine stressresponse system, also caused higher mortality and increased accumulation of I;. splendidus in challenged oysters. These results suggest that the physiological changes imposed by stress, or stress hormones, influenced host-pathogen interactions in oysters and increased juvenile C. gigas vulnerability to Vibrio splendidus.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 06:40:10