ABSTRACT
BACKGROUND:According to literature, there are differences among different species of animals in respect to absorption of Dxylose
OBJECTIVES: In two experiments, the differences that might exist in absorptive capacity of small intestine for D-xylose, in different types of chicken were tested
METHODS:In experiment one, 2 groups of nine adult layer type males [48 weeks] and females [58 weeks], and in experiment two, 4 groups of ten young [4 week] broiler type or layer type male or female chickens were dosed Dxylose solution [50 mg/mL, 500 mg/kg BW], orally
One blood sample before, and 5 others immediately after the administration of D-xylose solution, were taken from wing vein of the birds at 30 minute intervals for 150 minutes, and the concentration of D-xylose in plasma was measured
RESULTS: In experiment one, D-xylose concentration reached its peak at 60 to 90 min in both adult males and females, and followed a quadratic trend with time [r2 for adult males = 0.735 and adult females = 0.801]. In experiment two, Dxylose concentration reached its peak at 60 min for all experimental groups and followed a quadratic trend with time [r2 for broiler type male = 0.681, broiler type female = 0.850, layer type male = 0.695 and layer type female = 0.748]
CONCLUSIONS:D-xylose test was shown to be a sensitive tool for the evaluation of intestinal absorption capacity of chicken
This test revealed that there were some differences in absorption function of intestine among the birds with different breeds, sexes, ages, and nutritional demands
ABSTRACT
To evaluate the electrocardigraphic changes in the experimentally induced ascitis in broiler chickens using cold stress as a model. Experimental study.A total of 300 day-old male Ross 308 broiler chickes.Chickenswere randomly divided into two equal groups, [control and test], chicks were reared for six weeks. Gradually Temperature was gradually decreased in the test group to 30% of the standard program from 2 nd week of the rearing period. At the end of each week, 5 chicks from each group were selected and electrocardiographic recordings were performed. Also after autopsy right ventricle / total ventricular weight was measured and recorded. t- student Test and Bivariate correlation. There were significant elevation of the S wave amplitudes in 4th week [leads II, III, aVR]and 6th week [lead III] .S wave had a significant correlation with RV/TV in 4th week[lead II] and 5th week [leadsII, aVF] in the test group, too. There were also significant increase in the T wave amplitudes in 4[th] and 5[th] weeks [leadsII, aVF]and 6[th] week[leads aVF, aVR] in the test group.In this study, R waves did not show a significant variation with the exception of 4[th] week[lead II]. There were an elevation of MEA in test groups [with a right-cranial direction] but it just was significant in 4th week compared with control group. Electrocardiograms can be used effectively to evaluate the development of ascites syndrome in broiler chickens. The increase in the amplitude of S and T waves could be considered as the sign of ventricular hypertrophy in ascites syndrome resulted from cold condition
ABSTRACT
Objective: To study the changes in the viscera weight and intestinal density of broiler chickens in response to T3-induced ascites, caused by T3-supplementation of the diet
Design: Experimental study
Animals: One hundred and fifty, day old, male Ross broiler chicks
Treatment: Triiodothyronine [T3]
Procedure: The chickens were randomly divided into two equal groups [Control and T3-treated]. Diet of T3-treated group was supplemented with 1.5 ppm T3 for five weeks. At the end of each week five chicks from either group [ten chicks in total] were separated, and sacrificed. After exsanguinations and opening the thoracic and abdominal cavities ,the hearts and visceras were removed. The weight of right ventricle [RV] and total ventricles [TVs] of the heart were measured. The weight of viscera and weight and length of the intestines were also determined
Statistical analysis: T-test
Results: In T3-treated group, RV/TVs significantly increased at the end of the 3th, 4th, and 5th week, but the viscera weight was significantly decreased at the same time. The intestinal lengths were significantly reduced at the end of the 2nd, 4th, and 5th week, in response to T3 supplementation of the diet, but the reduction of intestinal weight and density were significant at the end of the 3th week
Conclusion: According to the results of this study the increases in RV/TVs and the decreases in viscera weight and intestinal length seem to be related to T3-induced ascites. The reductions in intestinal weight and density seen at the end of 3th week did not last for the following two weeks. This might indicates a transient reduction in thickness of the intestinal wall at the end of the 3" week and a direct proliferative effect of T3 on the intestinal crypt cells during the 4th and 5th weeks