Zobrazeno 1 - 10
of 15
pro vyhledávání: '"D R, Witlock"'
Publikováno v:
Poultry Science. 61:1293-1297
Three-week-old turkey poults receiving 250 μg/kg of dietary aflatoxin displayed prolonged prothrombin times due to decreased fibrinogen levels and depressed activity of factor II. Decreased body weights and increased mortality were also evident. Pou
Autor:
Roger D. Wyatt, D. R. Witlock
Publikováno v:
Poultry Science. 60:528-531
Young turkey poults fed graded levels of aflatoxin (0, 125, 250, and 500 microgram/kg) from hatching for 3 weeks displayed altered hemostasis, manifested in prolonged prothrombin times at 2 and 3 weeks of age. Body weights were only affected in those
Scanning electron microscopy of the cecal mucosa in Eimeria-tenella-infected and uninfected chickens
Publikováno v:
Avian diseases. 19(2)
Four major types of surface conformation were observed in the ceca of uninoculated control chickens. Spatulate villi were found in the cecal neck region, low ridges in the region where the neck expands, protruding collarlike structures in the mid cec
Publikováno v:
The Journal of parasitology. 64(1)
Severe infection with Eimeria acervulina, Eimeria maxima, Eimeria necatrix, and Eimeria tenella increased the prothrombin times in broilers compared with the times in uninfected birds. Recalcification time was not affected. The increase in prothrombi
Publikováno v:
The Journal of parasitology. 67(1)
Chickens dying from Eimeria tenella infection revealed four major physiological stresses before death: (1) hypothermia, (2) depletion of carbohydrate stores, (3) metabolic acidosis, and (4) renal tubule-cell dysfunction. These stresses were less pron
Autor:
P C, Augustine, D R, Witlock
Publikováno v:
Avian diseases. 28(2)
The osmotic fragility of red blood cells (RBC) from Eimeria adenoeides-infected turkey poults was compared with that of RBC from control and water-deprived poults. At different hypotonic NaCl concentrations, lysis of RBC from infected poults was 10 t
Autor:
D R, Witlock, R D, Wyatt
Publikováno v:
Avian diseases. 22(3)
Eimeria tenella, aflatoxicosis, and a combination of the two prolonged the prothrombin times of male Cobb broilers. Factor V added to the plasmas of birds infected with E. tenella corrected the prothrombin time. E. tenella infection did not significa
Autor:
D R, Witlock
Publikováno v:
The Journal of parasitology. 70(3)
Chickens dying from Eimeria necatrix infection had clinical signs indicative of hypothermia, depleted carbohydrate stores, acidosis and kidney dysfunction. Blood lost into the intestine of infected chickens was great (15-22 ml). The body temperature
Autor:
D R, Witlock
Publikováno v:
Avian diseases. 27(4)
Eimeria tenella-induced hemorrhage resulted in total blood losses of up to 10% of the body weight. Although packed cell volume was reduced 50%, neither plasma volume nor blood volume was significantly decreased, except briefly. The retention of lost
Autor:
D R, Witlock, M D, Ruff
Publikováno v:
The Journal of parasitology. 63(2)
Eimeria brunetti, an intestinal coccidial parasite of poultry, caused the most severe mucosal damage when compared to E. mivati, E. necatrix, and E. maxima. The damage caused by E. brunetti was observed in the ileum and large intestine and consisted