جستجوی مقالات مرتبط با کلیدواژه "ascites syndrome" در نشریات گروه "دامپزشکی"

On account of the importance of iodine in the synthesis of thyroid hormones, different levels of dietary iodine can affect the occurrence of ascites syndrome in broilers.

The current research aimed to investigate the effects of different sources and levels of iodine on performance, carcass traits, ascites mortality, thyroid hormones, and serum biochemical parameters of broiler chickens under cold stress condition.

This experiment was performed using 375 one-day-old male broiler chickens in a completely randomized design with five treatments, five replications, and 15 birds per replication. To induce ascites, the room temperature was reduced to 15 °C from 14 days and this temperature was maintained until the end of the period. The experimental treatments included: control treatment (basal diet with iodine at the recommended level, 1.25 ppm), basal diet + potassium iodide (KI) with iodine levels (6.25 and 3.75 ppm), and basal diet + calcium iodate [Ca(IO3)2. H2O] with iodine levels (6.25 and 3.75 ppm).

The effect of the treatments on the performance indices was not significant throughout the experiment. The lowest percentage of ascites mortality, heart weight, and triiodothyronine (T3) were observed in the treatment (6.25 ppm), which was significantly different from the control treatment (P<0.05). The lowest ratio of right ventricle to total ventricles (RV/TV) was related to potassium iodide treatment (6.25 ppm), which indicated tendency (P<0.10). Chickens receiving higher levels of iodine (6.25 ppm) had higher thyroxine than those receiving lower levels (3.75 ppm) (P<0.05) and showed a lower ratio of triiodothyronine to thyroxine compared to those (P<0.05).

The results of this experiment implied that the use of higher levels of dietary iodine (6.25 ppm), especially as potassium iodide, reduces broiler’s ascites mortality under cold stress conditions.

The ascites is a kind of metabolic disorder which occurs in broiler chickens and is controlled by different factors including genetics, environment and the management. The purpose of this study was to evaluate the effect of lime powder in diet on the adverse effects of high salt consumption in broiler chickens. In this study, 90 one-day-old broiler chicks were kept in identical and controlled conditions for 6 days. On the 7th day of age, 80 chicks were selected and divided randomly into 4 groups with two replicates and 10 chicks in each replicate. Then, for the induction of experimental ascites, a volume of 0.12 percent of sodium obtained from edible salt was added to the drinking water of 3 groups of chicks (groups 2, 3 and 4) and the other group (group 1) was considered as the negative control. The lime powder was added with concentrations of 1 and 2 percent to the diet of groups 3 and 4 from the 14th day of age. On the 21 day of age, 2 chicks were selected from each replicate and necropsied in order to evaluate the factors related to ascites syndrome. The amount of sodium was then increased to 0.18 percent in the drinking water of group 2, 3 and 4. On 30th days of age, 4 chicks were randomly selected from each replicate and necropsied to determine the ventricular weights, amount of hematocrit and the skin edema. The results showed that on day 30, the weight of right ventricle (RV) in treatment groups (groups 3 and 4) was significantly lower than the positive control group (group 2) (P=0.004). The occurrence of histopathological lesions in the skin tissues of the lemon treated groups were lower than that of the positive control group. According to the results of this study the use of lime powder in the diet is effective in the recovery of ascites syndrome and decrease the skin edema in broiler chickens.

In this study, the effect of mulberry leaf ethanoic extract on blood, serum and antioxidant parameters of broiler chickens under cold stress was investigated. A total of 108 one-day old broiler chickens (Ross 308) were randomly divided into 3 groups and each group included of 36 chicks with 3 replicates. Experimental treatments were: control group and two levels of mulberry leaf ethanoic extract, which respectively were fed with basal diet and levels of 0.05% and 0.1% of mulberry leaf ethanoic extract. Malondialdehyde and total antioxidant capacity of serum, PCV, heterophile to lymphocyte (H/L) ratio, right ventricle to total ventricle (RV/TV) ratio, serum biochemical factors and humoral and cellular immune responses were evaluated. The results of this study showed that RV/TV ratio was lower in mulberry leaf ethanoic extract, and this difference was statistically significant in the group 0.1% of mulberry leaf ethanoic extract (P<0.05). The H/L ratio was reduced in the level 0.1% of mulberry leaf ethanoic extract (P<0.05). PCV levels decreased insignificantly in mulberry leaf treatments. Serum nitric oxide increased in 0.1% of mulberry leaf group (P<0.05). Triglyceride level decreased significantly in the group 0.05% and LDL-C level decreased significantly at both levels of 0.05 and 0.1% of mulberry leaf (P<0.05). HDL-C increased significantly at the level 0.05% of mulberry leaf (P<0.05). Serum malondialdehyde decreased significantly in mulberry leaf treatments and total antioxidant capacity of serum increased significantly at the level 0.05% of mulberry leaf (P<0.05). There was no statistically significant difference in uric acid, total protein and serum cholesterol level. Humoral and cellular immunity increased insignificantly. Mortality decreased in mulberry leaf treatments but it was not significant. In conclusion the present study showed that the addition of mulberry leaf ethanoic extract to broiler chickens diet improved the antioxidant parameters and increased nitric oxide, decreased RV/TV ratio, blood lipid levels and mortality, so can be effective in preventing ascetic syndrome.

For comparison of the incidence rate of ascites in broilers affected by respiratory syndrome in Isfahan (ISF) and Chaharmaha-va-bakhtiari (CMB) provinces, 74 broiler chicken flocks in ISF and 27 broiler chicken flocks in CMB were monitored along growing period during 2010-2012. Results showed the frequency of ascites incidence in CMB was significantly higher than ISF (p<0.05). The analysis of data showed that there was a significant relationship between respiratory syndrome and ascites syndrome incidence in broiler chickens (p<0.05) but there was no relationship between ascites and location after respiratory syndrome. Furthermore, the percent of ascites incidence after respiratory syndrome in CMB was significantly higher than ISF (p<0.05). It seems that broiler chickens in CMB, due to some risk factors such as high altitude and low temperature, were highly susceptible to ascites after respiratory syndrome in comparison to ISF and it is necessary to apply specific nutritional and hygienic management measures of broiler flocks in this area.