Throughout the studies the following experimental results were summarized. 1. It was impossible to infect and kill the mice, weighing 10 to 12 gm, by inoculating 0.2ml of virulent Cl. chauvoei, diluted 1 to 10 with physiological saline, via subcutaneous, intramuscular, intraperitoneal or intraveonus, route. 2. The mice which were inoculated in brain with 0.03ml of Cl. chauvoei diluted 1 : 5120 with physiological saline were resulted in all death after infection, but not in case of attenuated strain even in dilution of one to five. 3. Virulent Cl. chauvoei were diluted with each of those of whole blood, erythrocytes and serum of horse, calf, swine, sheep, rabbit, guinea pig, chicken and duck, human plasma and 2% CaCl solution, and inoculated subcutaneously 0.25 to 0.5ml in mice, weighing 12 to 15gm. It was resulted in significant increase in virulence as comparing with the case of physiological saline solution except when horse and pig sera were used. Such a phenomena were not seen in attenuated strain. 4. Virulence of virulent Cl. Chauvoei could be increased significantly in rat, as the procedures used in mice, by suspending in whole blood, erythrocytes, serum, or plasma of various animals, or 2% $CaCl_2$ solution and by inoculating subcutaneously 0.5 to 10ml in rat, weighing 30 to 60 gm, as compared with those of control group which used physiological saline solutionos diluent. 5. Mice resisted 100 and 80 percent against challenge of $10^3$ and $10^4$ M.L.D.. respectively, 24 hours after inoculation of 0.5ml black leg antiserum. 6. Immune response to the black leg living vaccine in mice could be obtained more favorably in the group of respected vaccination rather than those of single inoculation and the most profitable inoculm size of the vacine was 0.5 to 1.0ml. 7. Challenge for the immunized mice could be carried out effectively 3 weeks after first vaccination. 8. Satisfactory results could be obtained by inoculating subcutaneously for the immunization and intracerebrally or subcutaneously for the challenge. 9. Mice which were inoculated with 0.5ml of black leg living vaccine via subtaneucously two times at seven days interval and 21 days after first inoculation and challenged with 5 and 10 M.L.D. of virulent strain, resited 100 and 70 to 80 percent respectively. Same results were obtainable in black leg killed vaccine as the procedures used in living vaccine. 10. There were significantly different resistances against the definite challenge does between the mice groups which were immnuized with the living vaccine diluted five or 10 times and the undiluted. 11. For the biological assay of black leg living vaccine and antiserum, satisfactory results could be obtained using mice.
FBs, secondary metabolites of several species of Fusaria, especially Fusarium moniliforme and F proliferatum, are commonly contaminated in com and other food grains throughout the world. Only recently identified, these mycotoxins have been associated field outbreaks of ELEM in horses and PPE in pigs. Currently, naturally or experimentally induced FB toxicosis has been studied in poultry, ruminants and rabbits. Poultry fed FB showed decreased growth rate, performance, and immune competence, as well as embryopathic, and embryocidal effects, and ricktes. Ruminants seem to be relatively less susceptible to FBs than other doestic animal. FB toxicosis reveals that liver is a target organ in all species, although other organs are affected in a species specific manner. Recently, the main target organs for $FB_1$ toxicity in rabbits was shown to be the kidney. Even low concentrations of FBs are likely to be a problem for animal health. A current study being conducted showed that feed containing low level of $FB_1$ reduces the ability of pulmonary intravascular macrophages in pig to clear blood-borne particles which would increase the susceptibility of animals to bacterial disease. The mechanism of FB toxicity remains unknown, but may be related to altered sphingolipid biosynthesis by inhibiting sphinganine N-acyltransferase. Elevations of serum and tissue SA:SO ratio have been observed in horse, pig, chicken, turkey, and rabbit, which could could serve as in effective biomarker for consumption of FB-containing feeds. There is limited information detailing dose-effect relationships either from field cases or in the laboratory. More research on the factors, including the prevalence and tolerance levels of FBs in feedstuffs that cause domestic animal disease associated with FBs, is urgently needed.
Different herbs and spices have been used as feed additives for various purposes in poultry production. This study was conducted to assess the effect of feed supplemented with black pepper (Piper nigrum), turmeric powder (Curcuma longa), coriander seeds (Coriandrum sativum) and their combinations on the performance of broilers. A total of 210 (Cobb) one-d-old chicks were divided into seven groups of 30 birds each. The treatments were: a control group received no supplement, 0.5% black pepper (T1), 0.5% turmeric powder (T2), 2% coriander seeds (T3), a mixture of 0.5% black pepper and 0.5% turmeric powder (T4), a mixture of 0.5% black pepper and 2% coriander seed (T5), and a mixture of 0.5% black pepper, 0.5% turmeric powder and 2% coriander seeds (T6). Higher significant values of body weight gain during the whole period of 5 weeks (p<0.001) were observed in broilers on T1, T3, T5, and T6 compared to control. Dietary supplements with T1, T2, T3, and T6 improved the cumulative G:F of broilers during the whole period of 5 weeks (p<0.001) compared with control. The dressing percentage and edible giblets were not influenced by dietary supplements, while higher values of relative weight of the liver (p<0.05) were obtained in T5 and T6 compared to control. The addition of feed supplements in T5 and T6 significantly increased serum total protein and decreased serum glucose, triglycerides and alkaline phosphatase concentrations compared with the control group (p<0.05). Broilers on T6 showed significant decrease in the serum glutamate pyruvate transaminase concentration (p<0.05) compared to control. The broilers having T5 and T6 supplemented feed had relatively greater antibody titre (p<0.001) at 35 d of age than control. It is concluded that dietary supplements with black pepper or coriander seeds or their combinations enhanced the performance and health status of broiler chickens.
A total of twenty, 2-wk-old male broiler chickens were allotted into control diet(CON) or a diet supplemented with 1% ground grape seed(GGS). They had free access to feed and water for 3 wk. Growth performance and antioxidant markers in plasma, intestine and liver were determined. Dietary addition of 1% GGS did not affect weight gain, feed intake, feed conversion and organ weight in 35 day-old broiler chickens significantly. There was no difference in plasma levels of glucose, triglyceride, cholesterol, AST, ALT and LDH activity. However, total antioxidant status(TAS) in blood increased(P<0.05) in chickens fed the diet supplemented with 1% GGS compared to those fed the control diet. In addition, the specific activity of intestinal superoxide dismutase(SOD) increased(P<0.05) in birds fed the diet supplemented with GGS. However, the activities of intestinal gluthathione peroxidase(GSHPx) and gluthathione -S- transferase(GST) and hepatic SOD, GSHPx and GST were not affected by the dietary GGS. The levels of reduced glutathione and lipid peroxidation in the small intestine and liver were not different between the two groups. In conclusion, dietary supplementation of 1% GGS did not result in a negative effect on growth performance. In addition, some antioxidant indicators including blood TAS and intestinal SOD were markedly elevated in response to dietary GGS. Therefore, dietary addition of 1% GGS may be beneficial to improve antioxidant capacity in broiler chicken.
Objectives: The purpose of the study was to compare intake of energy nutrients, physical characteristics, and the prevalence of metabolic syndrome according to protein intake group. Methods: Subjects were 827 men aged 40-65 years. The results presented were based on data from the 2012-2013 National Health and Nutrition Examination Survey and analyzed using SPSS. The odds ratio (OR) of metabolic syndrome was assessed according to the protein intake group and intake pattern of protein-rich foods. Results: The mean of protein intake was $73.96{\pm}0.71g$. According to level of protein intake, four groups (deficient, normal, excess 1, excess 2) were created and their percentages were 8.3%, 39.6%, 37.1%, and 15.0% respectively. The mean of daily energy intake was $2,312.33{\pm}24.08kcal$. It was higher in excess group 2 than in the deficiency group (p < 0.001). Moreover, the intake of all energy nutrients increased significantly with protein intake group (p < 0.001). The main contribution to daily protein included mixed grains ($10.96{\pm}0.32g$), milled rice ($7.14{\pm}0.30g$), chicken ($3.50{\pm}0.21g$), and grilled pork belly ($3.04{\pm}0.16g$). With regard to physical characteristics, and blood pressure and blood test results, only body mass index increased significantly according to protein intake groups (p < 0.05). The prevalence of metabolic syndrome in subjects was 38.5%, and there was no significant correlation with protein intake group. The OR of metabolic syndrome increased with protein intake, and was higher 4.452 times in excess group 2 than in the normal group (p < 0.05). Conversely, the OR of metabolic syndrome according to the frequency of protein-rich food intake did not show a significant correlation. Conclusions: The results of this study can be used as significant supporting data to establish guidelines for protein intake in middle-aged men.
Yu, Dong Gwon;Namgung, Nyun;Kim, Jong Hyuk;Won, Seung Yeon;Choi, Won Jun;Kil, Dong Yong
Journal of Animal Science and Technology
/
v.63
no.4
/
pp.815-826
/
2021
The objective of the current study was to investigate the effects of stocking density (SD) and dietary supplementation of vitamin C on growth performance, meat quality, intestinal permeability, and stress indicators in broiler chickens. The study was conducted using a completely randomized design with a 2 × 2 factorial arrangement consisting of 2 different SD and 2 supplemental levels of dietary vitamin C. A total of 1,368 Ross 308 broiler chickens of 21 days of age with similar body weights (BW) were randomly allotted to 1 of 4 treatments with 6 replicates each. Different numbers of birds per identical floor pen (2.0 m × 2.4 m) were used to create 2 different SD levels of low SD (9 birds/m2) and high SD (18 birds/m2). The basal diet was formulated with no supplemental vitamin C to meet or exceed nutrient recommendations of the Ross 308 manual. The other diet was prepared by supplementing 200 mg/kg vitamin C in the basal diet. The study lasted for 14 days. At the end of the study, 3 male birds per replicate were selected to analyze meat quality, intestinal permeability, and stress indicators such as blood heterophil:lymphocyte (H:L) and feather corticosterone (CORT) concentrations. Results indicated that there were no interactions between different SD and dietary supplementation of vitamin C for all measurements. For the main effects of SD, birds raised at high SD had less (p < 0.01) BW, BW gain, and feed intake with increasing stress responses including greater blood H:L and feather CORT concentrations (p < 0.01) than those raised at low SD. Transepithelial electrical resistance in the jejunal mucosa was decreased (p < 0.05) at high SD, indicating an increase in intestinal permeability. However, the main effects of dietary supplementation of 200 mg/kg vitamin C were insignificant for all measurements. In conclusion, high SD of broiler chickens impairs growth performance and intestinal barrier function with increasing stress responses. However, dietary supplementation of vitamin C may have little beneficial effects on broiler chickens raised at the high SD condition used in the present study.
The aim of this experiment was to compare the characterization of fatty acid digestion of Beijing Fatty (BF) and Arbor Acres (AA) chickens. One-day-old male AA and BF chickens were raised in the same house, and fed with the same diet. We first evaluated utilization of dietary fatty acids in chickens by the total collection procedure, and chickens were then killed to compare the abundance of intestinal mRNA expression of liver-fatty acid binding protein (L-FABP) and intestinal-fatty acid binding protein (I-FABP) by Real-time PCR, and also the pH of intestinal mucosa at 3 and 6 weeks of age. Another group of chickens were sampled at 6 weeks of age to compare the total bile acid concentration in serum, and lipase activity in contents of the small intestine. Results showed that compared to AA chickens, BF chickens had higher lipase activity in the content of the small intestine (p<0.05), greater total bile acid content in portal vein blood (p<0.05) at 6 weeks of age, lower intestinal mucosal pH at both 3 weeks (p<0.05) and 6 weeks (p<0.05) of age, and higher abundance of liver-fatty acid binding protein (L-FABP) mRNA expression in intestine tissues at 6 weeks of age (p<0.05), and higher digestibility of fatty acids at both 3 and 6 weeks (p<0.05) of age. There was no difference in I-FABP mRNA expression between AA and BF chickens at either age. Thus, BF chickens had greater fatty acids utilization than AA chickens that was associated with L-FABP, lipase activity, bile acid content and intestinal mucosal pH.
Rabbits were experimentally infected with rabbit hemorrhagic disease virs and the viral pathogenicity, hemagglutinability, and the effect of physicochemical factors were studied. The experimental results were summariaed as follows: 1. Mean rectal temperature of 11 infected rabbits was $40.0{\pm}0.47^{\circ}C$ prior to the virus inoculation, and $39.9{\pm}0.75^{\circ}C$ after 12hrs., $40.2{\pm}0.65^{\circ}C$ after 24hrs., $40.1{\pm}0.77^{\circ}C$ after 36hurs, and $40.6{\pm}0.56^{\circ}C$ just before the death. 2. Mean death time of infected rabbits was $40.3{\pm}22.0$ honrs and its range was 24 to 93 hours. 3. O, B, AB and A type of human erythrocytes were shown their HA in the order, but rabbit and chicken erythrocytes were not hemagglutinated by the virus. 4. In the hemagglutination, less than 0.25 per cent of a final concentration of erythrocytes and 0.2 per cent of BSA in PBS resulted in the best hemagglutination. Phosphate concentration in a range of 0.01M to 0.10M in PBS was not influenced on the hemagglutination reaction, and its pH 7.0 resulted in a better HA. 5. The hemagglutinating titers, in log 2 scale, of organs and tissues of the virus infected rabbits were $9.3{\pm}3.8$ (liver), $9.1{\pm}3.9$ (blood), $6.2{\pm}2.6$ (spleen) and $5.0{\pm}2.5$ (kidney). 6. The physicochemical factors such as heating ($50^{\circ}C$, 10 min.), trypsin treatment (0.05 pre cent, 5 min.), acid treatment (pH 3.0, 20 min.) and ether extraction (3 times) were not affective to the stability of virus and viral HA activities.
Objectives : The purpose of this study is to establish literatural evidence about thermotherapy and cryotherapy for Korean medicine through literatural review. Methods : Applicable paragraphs which were related to the thermotherapy and cryotherapy of cutaneous and muscle meridian were phrased from in "Yibujicheng(醫部集成) and "Dongyibaojian(東醫寶鑑)" where were archiving of Oriental or Korean medicine literatures. Searched paragraphs were analysed for establishing historical and theoretical bases of thermotherapy and cryotherapy in Korean medicine. Results : Thermotherapy of cutaneous and muscle meridian(經皮經筋溫熱療法) such as hot pack, warm water therapy, paraffin bath, ultrasound is originated from yu(慰) warm water(溫水) hot water(熱水). Matching indications are various pain conditions(caused by coldness(寒), hard-work(僗若), extravasated blood(瘀血), inflammatory skin disease, frostbite and several internal diseases. It also treats gynecological diseases and facial palsy. Diathermic therapy on acupuncture points(穴位照射溫熱療法) such as infra-red, microwave, shortwave is originated from huolu(火爐), wenlu(溫爐), xianglu(香爐), lamp light(燈火). Its objective is to improve the effects of herb medicine by aiding sweating or to treat the residual symptoms of fever disease or to care skin disease and pain from bone fracture, contusion. Cryotherapy of cutaneous and muscle meridian(經皮經筋溫寒冷療法) such as ice pack, ice spray, iced whirpool, cool water bath is originated from lengfu(冷敷), lengtie(冷貼), lengshiyu(冷石熨). Matching indications are contusions, animal bite injury, corn(肉刺) and (淋病), eye disease, nasal bleeding, hemorrhoid, inflammatory skin disease and chicken pox. Conclusions : Thermotherapy and cryotherapy of cutaneous and muscle meridian(經皮經筋溫冷療法) are the treatments which were used in Korean medicine from the ancient Korean medicine. As scientific equipments were originated from yu(慰), huolu(火爐), wenlu(溫爐), xianglu(香爐), lamp light(燈火). lengfu(冷敷), lengtie(冷貼), lengshiyu(冷石熨). It can be said that these are elements of Korean medicine. More rigorous studies are needed to establish clinical evidence about not only thermotherapy and cryotherapy but also the other physiotherapy of Korean medicine.
The eggshell, which is a complex and highly ordered structure, is very important factor for food safety and egg marketing. This study investigated the changes in eggshell structure and shell components in relationship to hen age. For this study, we examined the histological change of the endometrium of the 30-, 60-, and 72-wk-old commercial layers, and analyzed the ultrastructure and ionic composition of their eggshells. The results showed that histological deformation, fibrosis, atrophy and elimination of micro-villi in the uterus endometrium were found through microscopic observation that was associated with increasing hen age. Concentration of blood-ion components such as $Ca^{2+}$, $Na^+$, $K^+$, and $Cl^-$ ions did not change with age. Along with the results from the ultrastructure analysis of the eggshell, the palisade layer ratio and the density of mammillary knobs were significantly decreased in older hens. In addition, the type B mammillary knobs were frequently observed with increasing hen age. In the mineral element assay from the eggshell, $Ca^{2+}$, $S^{2-}$, and $Co^{2+}$ significantly decreased with increasing hen age, whereas $Na^+$, $K^+$, and $V^{2+}$ significantly increased. Therefore, the damages of endometrial tissue inhibit the processes of ion transmission and the crystallization of eggshell formation, resulting in a large and non-uniform mammillary knob formation. This means the conditions of endometrial cells affect the formation of the eggshell structure. In conclusion, hen aging causes the weakness of the eggshell and degrades the eggshell quality.
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