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Titolo:
EFFECTS OF CONCANAVALIN-A, FED AS A CONSTITUENT OF JACK BEAN (CANAVALIA-ENSIFORMIS L.) SEEDS, ON THE HUMORAL IMMUNE-RESPONSE AND PERFORMANCE OF BROILER-CHICKENS
Autore:
MENDEZ A; VARGAS E; MICHELANGELI C;
Indirizzi:
CENT UNIV VENEZUELA,CTR BIOQUIM NUTR,FAC CIENCIAS VET,APARTADO 4563 MARACAY ARAGUA VENEZUELA CENT UNIV VENEZUELA,CTR BIOQUIM NUTR,FAC CIENCIAS VET MARACAY ARAGUA VENEZUELA
Titolo Testata:
Poultry science
fascicolo: 2, volume: 77, anno: 1998,
pagine: 282 - 289
SICI:
0032-5791(1998)77:2<282:EOCFAA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHASEOLUS-VULGARIS LECTINS; YOUNG CHICKS; NUTRITIVE-VALUE; FEED-INTAKE; RATS; TOXICITY; ANTIGEN; MICE;
Keywords:
CONCANAVALIN A; CANAVALIA ENSIFORMIS; BRUCELLA ABORTUS; ANTIBODY; IMMUNE RESPONSE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
A. Mendez et al., "EFFECTS OF CONCANAVALIN-A, FED AS A CONSTITUENT OF JACK BEAN (CANAVALIA-ENSIFORMIS L.) SEEDS, ON THE HUMORAL IMMUNE-RESPONSE AND PERFORMANCE OF BROILER-CHICKENS", Poultry science, 77(2), 1998, pp. 282-289

Abstract

An experiment was conducted to investigate the effects of the lectin,Concanavalin A (Con A), contained in raw Jack bean (JB) (Canavalia ensiformis, L.) seeds on the immunological response of broilers. A maize-soybean meal basal diet was prepared to which either 2.5, 5, or 10% of ground raw Jack bean (RJB) seeds was added. The RJB seeds contained 24 g Con A/kg on a dry matter basis, as measured by rocket immunoelectrophoresis. Similar diets were prepared by using the same levels of JBafter toasting at 190 C for 16 min. In addition, the basal diet was pair-fed to groups of chicks at the level of feed intake of chicks fed the 10% RJB diet. Each diet was fed to six groups of six chicks for 6 wk. At 5 wk, 15 of chicks from each diet were immunized against Brucella abortus (BA) and the anti-BA antibody titers were determined 1 wk later by ELISA. Antibody production against Con A was also measured by the same method. Binding of Con A to intestinal villi and subsequent endocytosis were confirmed by microscopic examination using a specific peroxidase-antiperoxidase-staining technique. Performance was recordedweekly. Feed intake and weight gain were reduced (P < 0.05) only by the diet containing 10% RJB, indicating that broiler chicks can tolerate daily intakes of 100 mg of Con A over 6 wk without affecting growth. Toasted JB diets supported adequate chick performance. The antibody response to BA did not differ with dietary treatment. Serum from chicksfed raw JB also contained antibodies against Con A. The bursa of Fabricius, thymus, spleen, and pancreas dry weights, as a percentage of dry body weight, were not affected by the experimental diets. The data indicated that Con A binds to the cells of the gastrointestinal tract, passes into the general circulation and, eventually, elicits an immunological response without affecting the production of antibodies to BA.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 06:12:02