SYMPOSIA AND ORAL PRESENTATIONS Animal Health: Probiotics, Performance and Antioxidants
نویسندگان
چکیده
Thiamine deficiency causes a decrease in transketolase activity and an increase in thiamine pyrophosphate (TPP) effect on the erythrocytes. The objective of this experiment was to determine if ruminal acidosis alters erythrocytic transketolase enzyme activity as an indicator of thiamine level in feedlot cattle. A total of 65 feedlot cattle (1–2 years old) were fed either high concentrate diet (HCD, n = 50) or low concentrate diet (LCD, n = 15). The HCD group was fed a mixture of 75% cracked barley, 8% bran, 7% cotton seed meal and 10% straw for at least the last 3 mo, whereas the LCD group was fed a mixture of 30% cracked barley, 10% bran, 10% sugar beet pulp, 10% cotton seed meal and 40% straw. Rumen fluid samples of all cattle were obtained by rumenocentesis to determine ruminal pH. After ruminal samples were obtained, blood samples were collected from a jugular vein for erythrocytic transketolase enzyme activity using the Clausen’s colorimetric method. Mean pH values of ruminal fluid samples in the HCD and LCD groups were 5.3 and 6.1, respectively. The mean TPP effect % in the HCD group (47.16 ± 3.17) was significantly higher than in the LCD group (19.53 ± 2.51) (P < 0.01). Ruminants with functional rumen are considered to have no specific dietary thiamine requirement due to extensive thiamine synthesis by rumen microbes. Thiamine deficiency in both chronic ruminal acidosis and acute ruminal lactic acidosis may occur because of inadequate synthesis of thiamine, bacterial production of thiaminase in the acidotic ruminal fluid. Furthermore, a decrease in ruminal pH may result in the release of bacterial thiaminases. The present study demonstrated that thiamine deficiency could occur in ruminants fed under intensive fattening regimens.
منابع مشابه
Challenges and chances for psychosomatic medicine in health care: A report from the Third Annual Scientific Conference of the EAPM, Nuremberg, 2015.
The scientific program included plenary lectures, scientific symposia, workshops, clinical courses, master classes and poster sessions. In total, 37 symposia were submitted of which 28 were accepted for the program. In addition, 7 free paper sessions were organized, which included many of the 113 free oral presentations that were submitted. Fifty of the free oral presentations were accepted as ...
متن کاملSYMPOSIA AND ORAL PRESENTATIONS Animal Health: Respiratory Health, Viruses
J. Anim. Sci. Vol. 88, E-Suppl. 2/J. Dairy Sci. Vol. 93, E-Suppl. 1/Poult. Sci. Vol. 89, E-Suppl. 1 767 Newly received feedlot heifers managed with three respiratory disease protocols. J. L. Wahrmund*1, D. B. Burken1, B. K. Wilson1, S. J. Terrill1, D. L. Step2, C. R. Krehbiel1, C. L. Goad3, and C. J. Richards1, 1Oklahoma State University, Department of Animal Science, Stillwater, 2Oklahoma Stat...
متن کاملReport of the 20th European Stroke Conference, Hamburg, May 24-27, 2011.
ies, two educational symposia, eight mini-symposia and six newly organised academic symposia – all very well attended by more than 3,000 registered clinicians and basic scientists with interest in stroke research from all around the globe – we selected two for this Conference Report, nicely demonstrating the broad scope of topics addressed as well as the success made through recent research. Th...
متن کاملPSA Ancillary Scientists Symposia: Agricultural Biosecurity: Emerging Issues in Homeland Security & Food Safety
S Monday, July 26, 2004 SYMPOSIA AND ORAL SESSIONS * Author Presenting Paper PSA Ancillary Scientists Symposia: Agricultural Biosecurity: Emerging Issues in Homeland Security & Food Safety 1 Antibiotic use in Animals and the Impact of the Growth Promoter Ban in Europe. R. B. Phillips*, Animal Health Institute, Washington, DC. Antibiotic use in food animals in the United States is trending down ...
متن کاملThe 13th Annual Asia Pacific Conference on Vision, 2017
The 13th Annual Asia Pacific Conference on Vision, 2017 The 13th annual Asia Pacific Conference on Vision was held in Tainan, Taiwan. The APCV2017 organizing committees have put together a full and exciting meeting this year with over 161 presentations, including three invited keynote speech, six invited symposia, four self-organized symposia, six oral sessions and three poster sessions. There ...
متن کامل