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النتائج 11 - 20 من 83
Seroprevalence and risk factors for Trypanosoma evansi, the causative agent of surra, in the dromedary camel (Camelus dromedarius) population in Southeastern Algeria
2020
Benaissa, Mohamed Houcine | Mimoune, Nora | Bentria, Younes | Kernif, Tahar | Boukhelkhal, Abdelaziz | Youngs, Curtis R. | Kaidi, Rachid | Faye, Bernard | Halis, Youcef
Surra, caused by Trypanosoma evansi, is a re-emerging animal trypanosomosis, which is of special concern for camel-rearing regions of Africa and Asia. Surra decreases milk yield, lessens animal body condition score and reduces market value of exported animals resulting in substantial economic losses. A cross-sectional seroprevalence study of dromedary camels was conducted in Algeria, and major risk factors associated with infection were identified by collecting data on animal characteristics and herd management practices. The seroprevalence of T. evansi infection was determined in sera of 865 camels from 82 herds located in eastern Algeria using an antibody test (card agglutination test for Trypanosomiasis – CATT/T. evansi). Individual and herd seroprevalence were 49.5% and 73.2%, respectively, indicating substantial exposure of camels to T. evansi in the four districts studied. Five significant risk factors for T. evansi hemoparasite infection were identified: geographical area, herd size, husbandry system, accessibility to natural water sources and type of watering. There was no association between breed, sex or age with T. evansi infection. Results of this study provide baseline information that will be useful for launching control programmes in the region and potentially elsewhere.
اظهر المزيد [+] اقل [-]Expression of CD133, CD44, CK7, and OCT4 in Animal Cancers
2013
Park, J.H., Chungnam National University, Daejeon, Republic of Korea | Cho, E.S., Chungnam National University, Daejeon, Republic of Korea | Ryu, S.Y., Chungnam National University, Daejeon, Republic of Korea | Jung, J.Y., Chungnam National University, Daejeon, Republic of Korea | Son, H.Y., Chungnam National University, Daejeon, Republic of Korea
Cancers are mainly sustained by a small pool of neoplastic cells, known as cancer stem cells or tumorinitiating cells. These cells possess the ability to self-renew and proliferate, and are thus able to form the tumor. In the present study cells that correspond to cancer stem cells in mammary and liver cancers in animals were identified by the expression of CD133, CD44, CK7, and OCT4 using immunochemistry. As a result, we found with CD133+ and CD44+ cancer stem cell-like phenotypes in mouse and canine hepatocellular carcinoma and canine mammary gland tumors. However, CK7+ and OCT4+ cells were not identified in animal mammary and liver cancer. CD133+ and CD44+ cells are wellknown stem cell lines and play key roles in development and metastasis in human cancer. These findings suggest that cancer stem cells are involved in animal tumorigenesis and may provide insight into mechanisms in cancer development as well as cancer diagnostics.
اظهر المزيد [+] اقل [-]Therapeutic effects of 1alpha,25 dihydroxycholecalciferol on osteoporotic fracture in a rat model
1999
Bae, C.S. (Konkuk University, Seoul (Korea republic). Department of Surgery, Faculty of Veterinary Medicine)
Osteoporosis is defined as a decrease in bone mass that leads to an increased risk of fracture. The therapeutic effect of 1alpha,25 dihydroxycholecalciferol, the hormonal form of vitamin D3 that mediates calcium translation in intestine and bone, on the healing process of fracture has still been controversial. These studies were designed to understand the healing process of normal fibular fracture, the osteoporotic changes after ovariectomy, and the theraqeutic effects of 1alpha,25 dihydroxycholecalciferol on the osteoporotic fracture in rats. The simple transverse fractures of rat fibulae were produced with a rotating diamond saw. The changes of the biochemical and mechanical indices of rats were investigated. The mechanical study based on bending test revealed the healing of the fibular fracture in the 5th week after simple transverse fracture. The osteoporosis impaired more the healing of osteoporotic fibular fracture than normal non-osteoporotic fibular fracture. The healing process of osteoporotic fracture was facilitated by the treatment with 1alpha,25 dihydroxycholecalciferol, however was delayed more than the healing process of normal fracture. The bone strength based on the bending test also confirmed this tendency. The bone strengths in the 5th week after fracture of normal bone, osteoporotic bone, and 1alpha,25 dihydroxycholecalciferol-treated osteoporotic bone were 75%, 41% and 67%, respectively, in comparison with those of intact bone. In conclusion, 1alpha,25 dihydroxycholecalciferol was effective in promoting the osteroporotic fracture healing.
اظهر المزيد [+] اقل [-]The effects of electroacupuncture and laser at Da-zhui and Shen-shu on hematologic changes and blood concentration of endocrine substances in dogs
1999
Cho, Y.S. | Bae, C.S. (Konkuk University, Seoul (Korea republic). Faculty of Veterinary Medicine)
This study was carried out (a) to investigate the variations of blood chemistry and (b) to examine the secretion trend of endocrine substances in a dog model after electroacupuncture and laser stimulation at different time period(9 to 11a.m. and 6 to 8p.m.). Two acupuncture points; Da Zhui(GV-14) and Shen Shu(BL-23) were electroacupunctured for 20 minutes with 2Vol, 20Hz and irradiated for 5 minutes with 8,000Hz. Before stimulation and after a lapse of time(10-minutes, 30-minutes and 60-minutes) all dogs were checked the following parameters; cortisol, ACTH, RBC, hemoglobin, hematocrit, WBC, Ca, P, SGPT, SGOT and creatinine. The results were as follow:The levels of cortisol and ACTH have been increased 10 minutes after the stimulation of the electroacupuncture and laser. The higher levels of cortisol and ACTH have been decreased to keep the normal levels from 30 minutes after the stimulation of the electroacupuncture and laser. The RBC, hemoglobin, hematocrit and WBC showed the physiological phenomena in the electroacupuncture and laser stimulation. In sero chemical analysis, calcium, phosphate, SGOT, SGPT and creatinine levels were within normal physiological ranges.
اظهر المزيد [+] اقل [-]An Ornithobacterium rhinotracheale (ORT) suspected out break of poultry in Karachi [Pakistan]
2003
Khawaja, D.A. | Saeed, Z. | Butt, T.M. (Veterinary Research Inst., Lahore (Pakistan))
This study was carried out for investigation of an outbreak in Karachi. A disease outbreak in poultry was reported during April, 2000 in Karachi. The main symptoms included respiratory distress, sneezing and gasping. Autopsy of dead birds showed tracheitis, air-sacculitis and involvement of lungs. The morbid material was collected for processing in the laboratory. During the investigation for isolation of pathogenic bacteria or virus, Ornithobacterium rhinotracheale was isolated on 5% sheep blood agar plates in an atmosphere containing 5-10% CO2 at 37 degree C and identified through biochemical and fermentation tests. A Lasota like virus was also isolated from the same material which showed HA activity but was found negative to Avian Influenza virus against known Avian Influenza serum. The isolated virus was sent to Central Veterinary Laboratory, Weybridge, U.K. which confirmed it to be Lasota virus having comparatively high Intracerebral Pathogenicity Index (ICPI) as 0.90. Attempts for the transmission of the disease in susceptible healthy broiler chicks was successful through aerosol route using combination of inoculum of the isolated bacteria and virus. On post-mortem of infected birds air- sacculitis, tracheitis and unilateral pneumonia were noticed. Again ORT and NDV were isolated from the material harvested from these chicks. According to the observations of these experiments, it was concluded that the isolated ORT had a triggering effect on Lasota virus or vice versa. The environmental temperature and other stress factors might have aggravated the disease problem.
اظهر المزيد [+] اقل [-]Assessment of cattle owners' perceptions and expectations, and identification of constraints on production in a peri-urban, resource-poor environment
1999
Dreyer, K. | Fourie, L.J. | Kok, D.J. (Orange Free State Univ., Bloemfontein (South Africa). Dept. of Zoology and Entomology)
Enhancement of cell-mediated immunity by administration of plasma protein in pigs-(1)-Proportion of leukocyte subpopulations and cells expressing adhesion molecules in peripheral blood
1994
Yang, C.K. (Thaihan Industry Company, Seoul (Korea Republic). Veterinary Diagnostic Laboratory) | Kim, S.J. (Konkuk University, Seoul (Korea Republic). Department of Veterinary Medicine) | Moon, J.S. | Jung, S.C. | Park, Y.H. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)
Enhancement of cell-mediated immunity by administration of plasma protein in pigs-(2)-Proportion of T lymphocyte subpopulations and cells expressing MHC class 1, 2 molecules in peripheral blood
1994
Yang, C.K. (Thaihan Industry Company, Seoul (Korea Republic). Veterinary Diagnostic Laboratory) | Kim, S.J. (Konkuk University, Seoul (Korea Republic). Department of Veterinary Medicine) | Moon, J.S. | Jung, S.C. | Park, Y.H. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)
Comparison of enzyme cytochemical activities between rosetted cells in peripheral blood of Korean native cattle
1997
Kim, N.S. | Seo, Y.W. (Chung Bu Branch of the Kang Won-Do Veterinary Service Laboratory, Wonju (Korea Republic)) | Song, H.J. (Chonbuk National University, Chonju (Korea Republic). College of Veterinary Medicine) | Kim, S.J. (Kon-Kuk University, Seoul (Korea Republic). Department of Veterinary Medicine)
Effect of Euonymus alatus and Ulmus clavidiana var japonica on the immune system
1994
Kim, J.M. | Cho, J.G. | Jung, Y.M. | Park, T.W. (Chonbuk National University, Chonju (Korea Republic). College of Veterinary Medicine) | Choi, M.S. (Kunsan National University, Kunsan (Korea Republic). College of Ocean Science and Technology)