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Titolo:
Physiological, management and environmental triggers of the ascites syndrome: a review
Autore:
Julian, RJ;
Indirizzi:
Univ Guelph, Ontario Vet Coll, Dept Pathobiol, Guelph, ON N1G 2W1, Canada Univ Guelph Guelph ON Canada N1G 2W1 athobiol, Guelph, ON N1G 2W1, Canada
Titolo Testata:
AVIAN PATHOLOGY
fascicolo: 6, volume: 29, anno: 2000,
pagine: 519 - 527
SICI:
0307-9457(200012)29:6<519:PMAETO>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
PULMONARY-HYPERTENSION SYNDROME; MEAT-TYPE CHICKENS; RIGHT-VENTRICULAR HYPERTROPHY; GROWING BROILER-CHICKENS; HYPOBARIC HYPOXIA; ARTERY OCCLUSION; BLOOD-PRESSURE; ASCORBIC-ACID; FAILURE; LINES;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
57
Recensione:
Indirizzi per estratti:
Indirizzo: Julian, RJ Univ Guelph, Ontario Vet Coll, Dept Pathobiol, Guelph, ON N1G 2W1, Canada Univ Guelph Guelph ON Canada N1G 2W1 uelph, ON N1G 2W1, Canada
Citazione:
R.J. Julian, "Physiological, management and environmental triggers of the ascites syndrome: a review", AVIAN PATH, 29(6), 2000, pp. 519-527

Abstract

In meat-type chickens, an inadequacy of vascular capacity for blood flow through the lung to provide the tissues with the oxygen needed for rapid growth is the primary cause of pulmonary hypertension-induced ascites. There are a variety of other factors that can trigger the ascites syndrome. These factors may cause increased blood flow because of a higher metabolic rate (cold, heat, certain nutrients, chemicals, etc.) or they may cause pulmonaryhypertension-induced ascites in rapidly growing chickens because of greater resistance to blood flow in the lung by: (i) increased blood viscosity orred blood cell rigidity; or (ii) reduced vascular capacity in the lung. Some secondary factors, such as high sodium from salt in feed or water, may cause both increased flow and increased resistance to flow. Measures to reduce the ascites syndrome must address the primary genetic cause of insufficient vascular flow capacity in the lung and oxygen delivery to tissues, and the secondary factors that increase oxygen requirement, blood flow and the resistance to blood flow in the lung.

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Documento generato il 06/04/20 alle ore 01:05:49