Fusarium mycotoxicoses in poultry and swine: a comparative study of characterization and prevention
Notice bibliographique
Résumé
Deoxynivalenol (DON, vomitoxin), zearalenone and fusaric acid are the most commonly found 'Fusarium' mycotoxins in Ontario-grown feedstuffs. Trials were conducted to compare the effects of feeding diets naturally-contaminated with 'Fusarium' mycotoxins on broiler chickens and starter pigs. The contaminated diets were formulated by replacing corn and wheat of the control diet with those naturally-contaminated with ' Fusarium' mycotoxins. A polymeric glucomannan mycotoxin adsorbent (GM polymer) was also tested for its ability to prevent 'Fusarium' mycotoxicoses. Starter pigs were fed approximately half the amount of contaminated grains compared to broiler chickens. Feed intake and weight gain in pigs fed contaminated grains was reduced by 32 and 34%, respectively, while the decreases in broiler chickens were 15 and 12%. There is strong evidence that serotonergic and [alpha]2-noradrenergic systems interact antagonistically through medial hypothalamic satiety mechanisms. Serotonergic neurotransmitter concentrations were elevated, while norepinephrine concentrations decreased in the brain of pigs fed contaminated grains. The lack of an antagonistic interaction of these two systems on feed intake might explain feed refusal in pigs. In contrast, both norepinephrine and serotonergic neurotransmitter concentrations were elevated in broiler chickens, thus permitting the possible antagonistic interaction between the two systems. This situation may explain the less severe feed refusal seen in broiler chickens. The feeding of contaminated grains increased serum IgA and IgM concentrations in pigs, but not in broiler chickens. Peripheral blood monocyte and B cell numbers were decreased in chickens fed contaminated grains but not in pigs. The feeding of contaminated diets did not significantly alter contact hypersensitivity and antibody response. It was concluded that the changes in the number of peripheral blood immune cells were more prominent in broiler chickens than in starter pigs, but this was not enough to alter antibody and cell-mediated immune responses. Glucomannan polymer was able to prevent some of the adverse effects of 'Fusarium' mycotoxins on serum immunoglobulin concentrations, brain regional neurotransmitter concentrations, serum chemistry and hematology. It was, however, unable to prevent 'Fusarium' mycotoxin-induced reduction in feed intake and weight gains at the levels of inclusion of contaminated grains in the current studies.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».