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Articles by W. Aengwanich
Total Records ( 17 ) for W. Aengwanich
  W. Aengwanich
  The effects of high environmental temperature on plasma glucose were determined for a comparison of the ability to tolerate heat between Thai indigenous chickens, Thai indigenous chickens crossbred and broilers. One kilogram of males and females from the three breeds were maintained at an environmental temperature at 26±2 and 38±2°C. Plasma glucose was investigated on day 1, 7, 14, 21 and 28 of experimental period. The results revealed the following information: the plasma glucose of chickens at the high environmental temperature was significantly higher than that of chickens at thermoneutral (p<0.05). The plasma glucose of the Thai indigenous chickens, Thai indigenous chicken crossbreds and broilers maintained in each temperature condition was not significantly different (p>0.05). This experiment showed that plasma glucose is not suitable to use to compare the ability to tolerate heat because both the breed and sex of the chicken influence plasma glucose.
  W. Aengwanich
  The objective of the study reported here was to evaluate the effects of dexamethasone on physiological changes and productive performances in broilers. Broilers were divided into seven groups and received dexamethasone at 0 (control group), 1, 2, 3, 4, 5 and 6 mg kg-1 in their diets. Percentage of heterophils, lymphocytes, heteropil/ lymphocyte ratio, hemoglobin concentration, packed cell volume, total white blood cell count, body temperature, respiratory rate and productive performances (feed intake, average daily gain, feed conversion rate and body weight) of broilers were investigated on days 1, 7, 14 and 21 of the experimental period. The results revealed the following information: Heterophil, heterophil/lymphocyte ratio, total white blood cell count, body temperature, respiratory rate, packed cell volume and feed intake of broilers increased (p<0.05). On the other hand, lymphocyte, hemoglobin, average daily gain and body weight of broiler decreased (p<0.05). The results of this study indicated that synthetic glucocorticoid, dexamethasone had many effects on broilers like internal glucocorticoid. Side effects of dexamethasone to broilers were increased body temperature and respiratory rate and reduced growth rate even if feed intake of those chickens increased.
  W. Aengwanich
  The effects of high environmental temperatures on the body temperature of Thai Indigenous Chickens (TIC), Thai Indigenous Chickens Crossbred (TICC) and Broilers (BC) were determined for the purpose of comparing the chickens` responses to the increased heat. One kilogram of representative males and females of each of the three breeds were maintained at the environmental temperatures of 26 ±2 and 38 ±2 °C. Body temperature was investigated on days 1, 7, 14, 21 and 28 of the experimental period. The results revealed the following information: The body temperature of the chickens maintained at 38 ±2 °C was significantly higher than that of the chickens at 26 ±2 °C (p<0.05) and the body temperature of the BC maintained at 38±2 °C was significantly higher than that of the TIC and TICC (p<0.05). At 38 ±2 °C, on days 1, 7, 14, 21 and 28 of experimental period, the body temperature of the BC was significantly higher than that of the TICC and TIC, respectively (p<0.05). This experiment showed that the high environmental temperature had a greater effect on the BC than on the TICC and TIC, respectively.
  A. Chantiratikul , W. Aengwanich , O. Chinrasri and P. Chantiratikul
  The objective of this study was to determine the effect of sodium selenite and zinc-L-selenomethionine on plasma selenium (Se) concentration and glutathione peroxidase (GSH-Px) activity in the red blood cells (RBC) of laying hens. Two hundred twenty four CP Browns aged 71 weeks were divided according to a 2x3 factorial in completely randomized design. One more group without additional Se supplementation was used as negative control. Each treatment consisted of four replicates and each replicate contained eight hens. The dietary treatments were T1: basal diet, T2, T3 and T4: basal diets added 0.3, 1.0 and 3.0 mg Se from sodium selenite/kg, respectively, T5, T6 and T7: basal diets added 0.3, 1.0 and 3.0 mg Se from zinc-L-selenomethionine/kg, respectively. The findings revealed that the plasma Se concentration of hens received supplemented zinc-L-selenomethionine diets was higher (p<0.05) than that of hens received supplemented sodium selenite diets. Plasma Se concentration statistically increased (p<0.01) with increasing Se levels. The Se sources did not dramatically alter GSH-Px activity in RBC. However, GSH-Px activity significantly increased (p<0.01) with increasing dietary selenium levels. The results in this experiment indicate that zinc-L-selenomethionine increases higher plasma Se concentration than sodium selenite, however GSH-Px activity in RBC of laying hens is not affected by Se sources.
  W. Aengwanich
  The purpose of this experiment was to determine the effects of high environmental temperature on the blood indices (mean corpuscular volume, MCV; mean corpuscular hemoglobin, MCH; mean corpuscular hemoglobin concentration, MCHC) of Thai Indigenous Chickens (TIC), Thai Indigenous Chickens Crossbred (TICC) and broilers (BC). One kilogram of male and female TIC, TICC and BC were maintained in an environmental temperature range of 26±2°C and 38±2°C. MCV, MCH and MCHC were investigated on days 1, 7, 14, 21 and 28 of an experimental period. The results revealed the following information: On day 14 of the experimental period, MCV of the chickens maintained at 38±2°C was significantly higher than that of chickens maintained at 26±2°C (p<0.05). MCH of the chickens maintained in the environmental temperature at 38±2°C was significantly decreased during days 1-14 and then increased on day 21 of the experimental period (p<0.05). The MCH of chickens maintained at 26±2°C was significantly decreased during days 7-21 and then increased on day 28 of experimental period (p<0.05). On days 1 and 21, the MCH of chickens maintained in the environmental temperature at 38±2°C was significantly higher than that of chickens at 26±2°C (p<0.05). The MCHC of chickens maintained at 38±2°C was significantly higher than that of chickens at 26±2°C (p<0.05). Moreover, the MCHC of the TICC changed less than that of the TIC and BC (p<0.05). This experiment showed that the high environmental temperature had an effects on the chickens blood indices and more specifically, the MCHC of the TIC and BC responsed to high heat greater than TICC.
  W. Aengwanich
  The present study was conducted to determine the effect of high environmental temperatures and breed on live productive performances of Thai Indigenous (TIC), Thai Indigenous Crossbred (TICC) and Broilers (BC) Chickens. Twenty four TIC, TICC and BC, one kilogram of weight were used in this study. Chickens were housed in two conditions, i.e., 26±2°C and 38±2°C. At weeks 1, 2, 3 and 4 of experimental period, feed intake, average daily weight gain and feed conversion rate were investigated. The results revealed the following information: At thermoneutral, the productive performances of BC were higher than TICC and TIC (p<0.05), respectively. Under heat stress temperatures, the productive performance of the BC was higher than that of the TICC and TICC (p<0.05). The productive performance of chickens at thermoneutral was higher than that of chickens under heat stress (p<0.05). However, at week 4 the feed conversion rate of the BC was higher than that of the TICC and TIC (p<0.05) and high environmental temperatures did not affect the feed conversion rate of TICC (p>0.05). The result of the current trials indicates environment temperature and breed influence the productive performance of chickens.
  W. Aengwanich
  The purpose of this experiment was to compare the effects of high environmental temperatures on the percentage of lymphocytes between Thai Indigenous Chickens (TIC), Thai Indigenous Chickens Crossbred (TICC) and Broilers (BC) TIC and TICC and BC. One kilogram of male and female TIC and TICC and BC were maintained in the environmental temperature range of 26±2 and 38±2oC. Percentage of lymphocytes was investigated on days 1, 7, 14, 21 and 28 of an experimental period. The results revealed the following information: On days 1 and 28, the percentage of lymphocytes of male and female TIC, TICC and BC at 26±2 and 38±2oC was not significantly different (p>0.05). On days 7, 14 and 21 of the experimental period, the percentage of lymphocytes of the chickens at 26±2oC was significantly higher than that of chickens at 38±2oC (p<0.05). At 38±2oC, on day 7, the percentage of lymphocytes of the male and female TIC and TICC was significantly higher than the male BC (p<0.05). On day 14, the percentage of lymphocytes of the male TIC was significantly higher than the male BC (p<0.05) and on day 21 of the experimental period, the percentage of lymphocytes of the male and female TIC and TICC was significantly higher than that of the male BC (p<0.05). These phenomena indicated that the chickens maintained at high environmental temperatures, were under heat stress. Chickens adapted to high heat and the BC were less tolerant to the high heat than the TICC and TIC, respectively.
  W. Aengwanich , M. Suttajit , T. Srikhun and T. Boonsorn
  An experiment was conducted to evaluate the effect of tamarind seed coat extract on the average daily weight gain, feed intake and feed conversion rate of broilers. Broilers were divided into 6 groups and received polyphenols from tamarind seed extract at 0 (control), 100, 200, 300, 400 and 500 mg/kg in their diets for 21 days. The results revealed the following information: During the period of 36-42 days of age, the average daily weight gain of broilers that received tamarind seed coat extract at 100 mg/kg in their diet was significantly higher than the weight gain of broilers that received tamarind seed coat extract at 0, 200, 400 and 500 mg/kg in their diets (p<0.05). Throughout the experimental period, the average daily weight gain tended to be highest in the group that received tamarind seed coat extract at 100 mg/kg in their diet. The feed intake and feed conversion rate of broilers in all groups were not significantly different (p>0.05). This study demonstrated that tamarind seed coat extract has a property similar to antibiotic feed additives and provides slightly improved average daily weight gain.
  W. Aengwanich , M. Suttajit and N.-A. Narkkong
  Tamarind (Tamarindus indica L.) is a plant that belongs to the Leguminosae family and grows naturally in tropical and subtropical regions. Tamarind seed coat is composed of polyphenols especially procyanidin oligomers. The objective of this experiment was to determine the effect of polyphenols extracted from tamarind seed coat on differential white blood cell counts of broilers maintained at high environmental temperature. Broilers were divided into 2 groups. In group 1, broilers were maintained in environmental temperature at 26±2oC throughout experimental period, and in group 2, broilers were maintained in environmental temperature at 38±2oC and received polyphenols i.e. 0, 100, 200, 300, 400 and 500 mg/kg in diets. Differential white blood cell counts were investigated on days 1, 7, 14 and 21 of experimental period. The results revealed the following information: Lymphocyte and basophil levels of broilers maintained in the environmental temperature at 38±2oC and received polyphenols at 400 mg/kg in diet were increased (p<0.05). On the other hand, the heterophil and monocyte levels of broilers maintained in the environmental temperature at 38±2oC and received polyphenols at 400 mg/kg in diet were decreased (p<0.05). This occurrence indicated that polyphenols extracted from tamarind seed coat could reduce heat stress in broilers.
  T. Srikhun , W. Aengwanich and W. Kongbuntad
  The purpose of this experiment was to investigate the effects of polyphenols extracted from tamarind (Tamarindus indica L.) seed coat on total body weight, white blood cells, bursa of Fabricius and NDV-HI titer of broilers maintained in high environmental temperature. The broilers under study were divided into two main groups. Those in the first group were maintained at 26"2oC and the second group at 38"2oC. The broilers in the second group were subdivided into six sub-groups, each of which received polyphenols at 0, 100, 200, 300, 400 and 500 mg/kg in their diets. The results revealed that the body weights of the broilers in all groups were not different. The total white blood cell counts and lymphocyte counts of the broilers in all sub-groups of the second group were higher than that of the broilers in the first group (p<0.05). On day 21 of the experimental period, the total number of white blood cells and lymphocytes of the broilers in the first group was not different from those of the broilers in the first, second, fifth and sixth sub-groups of the second group (p>0.05). The relative bursa of Fabricius weight of the broilers in the first group and the third sub-group of the second group were not different (p>0.05). Furthermore, lesion scores of the bursa of Fabricius of the first group and the third and fourth sub-groups of the second group were not different (p>0.05). Moreover, NDV-HI titer of the broilers in the first group and all sub-groups of the second group were not also different (p>0.05). These phenomena indicated that polyphenols could increase the number of lymphocytes and relative bursa of Fabricius weight. On the other hand, the extract could decrease lesion scores of bursa of Fabricius in heat stressed broilers.
  A. Juasook , W. Aengwanich , T. Chalalai , N. Watwiengkam , T. Asawapattanakul and W. Promsud
  Objective: This experiment was conducted to study the effects of pineapple (Ananas comosus) peel and core extracts for controlling in vitro and in vivo chicken cecal coccidiosis. Materials and Methods: In vitro, 5,000 unsporulated oocysts per well with three replicates were divided into 4 groups: incubated in distilled water, toltrazuril, pineapple peel and core extract, respectively, at 25°C for 48 h. The number of sporulated oocysts was counted using McMaster chamber method. In vivo, 100 heads of one-day-old male broilers were divided into 5 groups: control, infected with E. tenella oocysts, infected and treated with toltrazuril, infected and treated with pineapple peel extract and infected and treated with pineapple core extract. All infected groups were inoculated with 20,000 sporulated E. tenella oocysts at day 21 of the experiment. After 7 days of infection, all of the chicks were euthanized and the blood, feces and cecum were collected for analysis. Results: In vitro results showed that the number of sporulated E. tenella oocysts in the pineapple peel and core extract groups decreased significantly (p<0.05). Correspondingly, histopathological study of the cecum showed that infection of E. tenella was greatly decreased in these groups. Surprisingly, pineapple extract groups had a significant increase in malondialdehyde level (p<0.05), which was correlated with increased inflammatory infiltration in cecal tissue of these groups. Conclusion: Pineapple crude extract inhibited sporulation and decreased the chance of E. tenella infection, but may be toxic by inducing cecal tissue inflammation.
  W. Aengwanich , N. Narkkong and A. Tanomthong
  Blood samples from eastern sarus cranes housed at Nakhonratchasima Zoo, Nakhon Ratchasima, northeastern, Thailand were collected in January, 2007. A morphological observation of the thrombocytes was examined using scanning electron microscopy. The results revealed the following information: The thrombocytes of the eastern sarus cranes are tiny cells and they display a smooth, irregular, spherical and pseudopodic membrane surface with long microfilament protrusions from their membrane. The thrombocytes of the eastern sarus cranes use these microfilaments to attach to other blood cells for movement and blood clumping. The long microfilaments were not found in fish, reptiles and other domestic birds. The morphological structure of the thrombocyte, the microfilaments and the activities of the eastern sarus crane has not been reported previously.
  S. Ponsen , C. Talabmook , N. Narkkong and W. Aengwanich
  The blood cell characteristics, blood cell dimension and hematological values of sand lizards were studied in eighty sand lizards during March-July, 2006. These lizards were obtained from provinces in the Northeastern part of Thailand. The results gave following information: The blood cell characteristics of sand lizards presented distinct morphology. The blood cell characteristics of sand lizards were similar to those of other reptiles. Red blood cell width and length, diameter of lymphocyte, monocytes and heterophils of the male sand lizard were significantly larger than those of the female. On the other hand, the diameter of male basophil was significantly less than that of the female. Packed cell volume, hemoglobin concentration, total red blood cell count and heterophil of the male sand lizards were significantly higher than those of the female. In contrast, the basophil and eosinophil of the male sand lizards were significantly lower than those of the female. These findings indicated that sex influenced the hematological values of sand lizards.
  W. Aengwanich , N. Narkkong and A. Tanomthong
  .
  W. Aengwanich and A. Tanomtong
  Blood cell characteristics and hematological values were studied in thirty-three healthy free ranging-red jungle fowl (Gallus gallus) (male, n = 17; female, n = 16), at the age of 2-3 years, which had been free ranged at Nakhonratchasima Zoo, Nakhon Ratchasima province northeastern, Thailand. The results revealed the following information: the morphologic features of blood cells from red jungle fowls were similar to those of other species of chicken. TRBC, Hb, PCV, MCV, MCH, MCHC, TWBC, lymphocyte, heterophil, monocyte, eosinophil, basophil, thrombocyte of Red Jungle Fowl were 4.43±0.67 (3.76-5.10) x106 cells μL•-1, 13.63±2.28 (11.35-15.91) g %, 41.34±6.71 (34.63-48.05) %, 93.57±7.97 (85.60-101.54) fl, 30.80±2.24 (28.56-33.04) g dL•-1, 30.41±1.60 (28.81-32.01) pg, 9,140±3,839.27 (5,300.73-12, 979.27) cells /μL, 74.6±20.27 (54.33-94.87) %, 21.83±19.18 (2.65-41.01) %, 2.00±1.47 (0.53-3.47) %, 3.50±1.34 (2.16-4.84) %, 1.67±2.79 (0-4.46) %, respectively. Width and length of red blood cell of red jungle fowls were 6.70±0.57 and 10.65±0.59 μm. Diameter of heterophil, lymphocyte, monocyte, eosiniphil, basophil and thrombocyte of red jungle fowls were 10.85±0.75, 5.60±0.48, 9.35±1.04, 8.25±0.91, 7.63±1.40 and 4.25±0.72 μm, respectively. Moreover, total red blood cell, hemoglobin concentration and packed cell volume of males red jungle fowl were higher than females (p<0.05). Finally, MCV, MCH and MCHC of the male and female red jungle fowl were not significantly different (p>0.05).
  Chinrasri Orawan and W. Aengwanich
  This investigation was carried at the Experimental Laboratory Unit, Division of Animal Production Technology, Faculty of Technology, Mahasarakham University, Mahasarakham, Thailand in August to December 2004. Three different breeds of poultry were used, i.e., Thai indigenous, Thai indigenous crossbred and broiler chickens. The experiment was laid in a split plot design with three replications. The three poultry breeds were used as main plots, whilst gender (male and female) and sampling periods were used as subplots. An assay on blood characteristics and blood counts of red and white blood cells were carried out. Feed intake and average daily gained weight (ADG)/week were determined. The results showed that the appearances on blood cells characteristics of erythrocyte of red blood cells and white blood cells of heterophil, eosinophil, monocyte, basophil and thrombocyte of the three poultry breeds were not different from one another. Hematological values of the three different breeds possessed normal blood values for normal growth and they fitted within a normal range of blood of normal chickens. Hemoglobin concentration (Hb) of Thai indigenous chickens was higher than both Thai indigenous crossbred and broiler chickens. White blood cells of heterophil of Thai indigenous crossbred chickens were higher than broiler chickens, whilst white blood of lymphocyte of female was higher than female. However, the differences found on hematological values of both male and female were not statistically significant. Daily feed intake/week and average daily gained weight increased/week of broiler chickens ranked the highest followed by Thai indigenous crossbred and the lowest was with Thai indigenous chickens.
  W. Aengwanich
  The effects of high environmental temperature on the heterophil/lymphocyte ratio were determined for a comparison of the ability to tolerate heat between Thai indigenous chickens, crossbred Thai indigenous chickens and broilers. One kilogram of the representative males and females of each of the three breeds were maintained in an environmental temperature range of 26±2 and 38±2°C. Heterophil/lymphocyte ratio was investigated on day 1, 7, 14, 21 and 28 of the experimental period. The results revealed the following information: For those chickens maintained in an environmental temperature at 38±2°C, the heterophil/lymphocyte ratio was higher than that of chickens at 26±2°C. With the environmental temperature at 38±2°C, the heterophil/lymphocyte ratio of the broilers was significantly higher than that of the Thai indigenous chicken crossbreds and Thai indigenous chickens (p<0.05), respectively. The heterophil/lymphocyte ratio of the chickens for the environmental temperature of 38±2°C was significantly increased on day 7 and then significantly decreased to day 14 and 21 of experimental period (p<0.05). This finding indicated that when chickens were maintained in high environmental temperatures, they were under heat stress. Chickens could adapt to high environmental temperatures. Finally, Thai indigenous chickens and Thai indigenous chicken crossbreds tolerated higher environmental temperatures than the broilers.
 
 
 
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