Refinar búsqueda
Resultados 101-110 de 476
Drivers of disease emergence and spread: Is wildlife to blame?
2014
Kock, Richard(Royal Veterinary College Department of Pathology and Pathogen Biology)
The global focus on wildlife as a major contributor to emerging pathogens and infectious diseases (EIDs) in humans and domestic animals is not based on field, experimental or dedicated research, but mostly on limited surveys of literature, opinion and the assumption that biodiversity harbours pathogens. The perceived and direct impacts of wildlife, from being a reservoir of certain human and livestock pathogens and as a risk to health, are frequently overstated when compared to the Global burden of disease statistics available from WHO, OIE and FAO. However organisms that evolve in wildlife species can and do spill-over into human landscapes and humans and domestic animal population and, where these organisms adapt to surviving and spreading amongst livestock and humans, these emerging infections can have significant consequences. Drivers for the spill-over of pathogens or evolution of organisms from wildlife reservoirs to become pathogens of humans and domestic animals are varied but almost without exception poorly researched. The changing demographics, spatial distribution and movements, associated landscape modifications (especially agricultural) and behavioural changes involving human and domestic animal populations are probably the core drivers of the apparent increasing trend in emergence of new pathogens and infectious diseases over recent decades.
Mostrar más [+] Menos [-]Mobile technologies for disease surveillance in humans and animals
2014
Mwabukusi, Mpoki(Southern African Centre for Infectious Disease Surveillance) | Karimuribo, Esron D.(Sokoine University of Agriculture Department of Veterinary Medicine and Public Health) | Rweyemamu, Mark M.(Southern African Centre for Infectious Disease Surveillance) | Beda, Eric(Southern African Centre for Infectious Disease Surveillance)
A paper-based disease reporting system has been associated with a number of challenges. These include difficulties to submit hard copies of the disease surveillance forms because of poor road infrastructure, weather conditions or challenging terrain, particularly in the developing countries. The system demands re-entry of the data at data processing and analysis points, thus making it prone to introduction of errors during this process. All these challenges contribute to delayed acquisition, processing and response to disease events occurring in remote hard to reach areas. Our study piloted the use of mobile phones in order to transmit near to real-time data from remote districts in Tanzania (Ngorongoro and Ngara), Burundi (Muyinga) and Zambia (Kazungula and Sesheke). Two technologies namely, digital and short messaging services were used to capture and transmit disease event data in the animal and human health sectors in the study areas based on a server-client model. Smart phones running the Android operating system (minimum required version: Android 1.6), and which supported open source application, Epicollect, as well as the Open Data Kit application, were used in the study. These phones allowed collection of geo-tagged data, with the opportunity of including static and moving images related to disease events. The project supported routine disease surveillance systems in the ministries responsible for animal and human health in Burundi, Tanzania and Zambia, as well as data collection for researchers at the Sokoine University of Agriculture, Tanzania. During the project implementation period between 2011 and 2013, a total number of 1651 diseases event-related forms were submitted, which allowed reporters to include GPS coordinates and photographs related to the events captured. It was concluded that the new technology-based surveillance system is useful in providing near to real-time data, with potential for enhancing timely response in rural remote areas of Africa. We recommended adoption of the proven technologies to improve disease surveillance, particularly in the developing countries.
Mostrar más [+] Menos [-]Cutaneous peripheral nerve sheath tumors in 15 dogs
2014
Ko, S.B., Jeju National University, jeju, Repubic of Korea | Song, K.O., Jeju Self-Governing Provincial Veterinary Research Institute, jeju, Republic of Korea | Kang, S.C., Optipharm, Cheongwon, Republic of Korea | Kim, J.H., Jeju National University, jeju, Repubic of Korea
Peripheral nerve sheath tumors (PNSTs) are heterogeneous tumor groups of peripheral nerves that originate from either Schwann cells or modified Schwann cells, fibroblasts, or perineural cells. In this study, signalment and clinical data such as tumor location and size were evaluated for 15 cases of PNSTs collected from local animal hospitals. The mean age of dogs with malignant PNST was higher than that of dogs with benign PNST. Additionally, the male to female ratio in dogs with PNST was 1 : 4. In dogs with PNST, the primary sites of involvement were the hindlimb, forelimb, around the mammary glands, the neck, and the abdomen. Histiopathologic examination revealed that eight PNSTs were benign and seven were malignant. The tumor cells were composed of loosely to densely arranged interlacing bundles and wavy spindle cells arranged in short bundles, palisading, and whirling. High mitotic figures, local invasion, multifocal necrosis and atypical multinucleated giant cells were observed in malignant PNST cases. All PNSTs showed immunoreactivity for vimentin and S-100. However, only 93.3% and 73.3% were immunoreactive for NSE and GFAP, respectively. Overall, these results indicated that immunohistochemical markers such as vimentin, S-100 and NSE could help confirm the diagnosis of canine PNSTs.
Mostrar más [+] Menos [-]A study of animal bones excavated from the shell mound of Jeju Jongdali 1819 archaeological site
2014
Kang, Y.H., Jeju National University, Jeju, Republic of Korea | Moon, J.H., Jeju National University, Jeju, Republic of Korea | Ahn, M.J., Jeju National University, Jeju, Republic of Korea | Bang, M.B., Jeju Cultural Heritage Institute, Jeju, Republic of Korea | Shin, T.K., Jeju National University, Jeju, Republic of Korea
Animal bones excavated with earthenware from the shell mound at the Jeju Jongdali 1819 archeological site, where three consecutive chronological layers covering the Neolithic (B.C. 15C-B.C. 10C), early Tamra, and late Tamra periods have been identified, were morphologically classified. The majority of the bones from all three periods were broken or split. The major fauna of the mammalian bones in all periods were Cervus spp., Sus scrofa, and Bos taurus. In the early and late Tamra periods, bones of small animals including Mustela sibirica coreana, Meles meles, Rodentia, and Aves were also found in small number. The excavated bones were from all parts of the animal bodies, including head, trunk, forelimb, and hindlimb. Collectively, these findings suggest that the major fauna from the Neolithic to late Tamra periods consisted of Cervus spp., Sus scrofa, and Bos taurus and that the fauna was dissected and carried to the shell mound site after hunting. Information from the bone remains in the shell mound are useful data for study of the wildlife and domestic animals living during the prehistoric period of Jeju Island.
Mostrar más [+] Menos [-]Preoperative administration effect of metronidazole, ceftriaxone sodium and their combination on stenotic index of jejunal anastomotic segment of dogs
2014
Rehan, Rafique., Veterinary Research Institute, Lahore, Pakistan | Asi, Muhammad Nadeem., Department of Clinical Medicine & Surgery, University of Agriculture Faisalabad, Faisalabad, Pakistan | Saqib, Muhammad., Department of Clinical Medicine & Surgery, University of Agriculture Faisalabad, Faisalabad, Pakistan | Hussain, Muhammad Hammad., Department of Clinical Medicine & Surgery, University of Agriculture Faisalabad, Faisalabad, Pakistan | Sial, Awais-ur-Rehman., Department of Clinical Medicine & Surgery, University of Agriculture Faisalabad, Faisalabad, Pakistan | Mushtaq, Aqsa, Veterinary Research Institute, Lahore, Pakistan
The jejunum is the longest part of the small intestine and its lumen is mainly involved in the absorption of the nutrients. The present study was conducted to evaluate the effects of metronidazole, ceftriaxoine sodium and their combination on the stenotic index of the end to end jujunal anastomotic site. To accomplish this, 20 healthy stray dogs were subjected to end to end jejunal ansastmosis. Dogs in Group A (control) underwent jejunal anstomosis with no antibiotic prophylaxis, while those in Group B received surgery and metronidazole alone at 50 mg/kg, those in Group C received ceftriaxone sodium intravenously at 30 mg/kg body weight prior to surgery and dogs in Group D were given metronidazole in combination with ceftriaxone sodium at 50 mg/kg and 30 mg/kg, respectively, 2 h before surgical intervention. No significant difference (p 0.05) in the stenotic index was observed at 14 days after jejunal anastomosis. These findings indicate that prophylactic administration of metronidazole and ceftriaxone sodium alone or in combination had no significant effect on the stenotic index of the jejunum.
Mostrar más [+] Menos [-]Effect of repeated Paecilomyces japonica treatment on rats
2014
Kim, Y.B., Korea Institute of Toxicology, Daejeon, Republic of Korea | Hong, D.H., Chungnam, National University, Daejeon, Republic of Korea | Cho, E.S., Chungnam, National University, Daejeon, Republic of Korea | Im, W.J., Korea Institute of Toxicology, Daejeon, Republic of Korea | Kim, I.H., DAEWOONG Pharmaceutical Co., Yongin, Republic of Korea | Son, H.Y., Chungnam, National University, Daejeon, Republic of Korea
Cordyceps is a fungus used as a traditional medicine in China, Japan, and Korea. Paecilomyces (P.) japonica is a new cordyceps that was recently cultivated on silkworm pupae in Korea. The present study evaluated the toxicological effects of P. japonica in rats. Forty rats were treated with oral doses of P. japonica (0, 20, 100, or 500 mg/kg/day) for 4 weeks. Twenty additional rats were treated with 0 or 500 mg/kg/day of P. japonica for 4 weeks and then maintained for 2 weeks without treatment. Clinical signs, body weight, food and water consumption, and organ weight as well as hematology, serum biochemistry, and histopathology data were examined. Body weight gain of the group treated with 500 mg/kg/day was significantly reduced. Microscopically, karyomegaly, single cell necrosis, and mitosis were observed in the renal tubular epithelium of all treated groups. In conclusion, P. japonica caused a reduction of body weight and renal injury in rats. The no observed adverse effect level (NOAEL) of P. japonica was less than 20 mg/kg/day.
Mostrar más [+] Menos [-]Prevalence of virulence and cytolethal distending toxin (CDT) genes in thermophilic Campylobacter spp. from dogs and humans in Gyeongnam and Busan, Korea
2014
Cho, H.H., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Kim, S.H., Viral infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea | Min, W.G., Gyeongsang National University, Jinju, Republic of Korea | Ku, B.K., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Kim, Y.H., Gyeongsang National University, Jinju, Republic of Korea
The prevalence of thermophilic Campylobacter (C.) spp. in stray, breeding, and household dogs was 25.2, 12.0, and 8.8%, respectively. C. jejuni and C. upsaliensis were the predominant Campylobacter spp. from household dogs. cdtA, cdtB, and cdtC were detected by PCR in all isolates. Despite the high cytolethal distending toxin (CDT) gene prevalence, only 26 (31%) C. jejuni strains and one (15.3%) C. coli strain showed evidence of CDT production in HEp-2 cell cytotoxicity assays. Virulence-associated genes detected in the C. jejuni and C. coli isolates were cadF, dnaJ, flaA, racR, ciaB, iamA, pldA, virB11, ceuE, and docC. cadF, dnaJ, flaA, and ceuE were found in all C. jejuni and C. coli isolates. When detecting Guillain-Barre syndrome-associated genes (galE, cgtB, and wlaN), galE was identified in all isolates. However, cgtB and wlaN were more prevalent in C. jejuni isolates from humans than those from dogs. Adherence and invasion abilities of the C. jejuni and C. coli strains were tested in INT-407 cells. A considerable correlation (adjusted R©�= 0.678) existed between adherence and invasion activities of the Campylobacter spp. isolates.
Mostrar más [+] Menos [-]Trends in antimicrobial sales for livestock and fisheries in Korea during 2003-2012
2014
Lim, S.K., Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Lee, J.E., Korea Animal Health Products Association, Seongnam, Republic of Korea | Lee, H.S., Korea Animal Health Products Association, Seongnam, Republic of Korea | Nam, H. M., Korea Animal Health Products Association, Seongnam, Republic of Korea | Moon, D.C., Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Jang, G.C., Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Park, Y.J., Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Jung, Y.G., Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Jung, S.C., Animal and Plant Quarantine Agency, Anyang, Republic of Korea | Wee, S.H., Animal and Plant Quarantine Agency, Anyang, Republic of Korea
In this study, trends in the sales of antimicrobials for use in livestock facilities and fisheries from 2003 to 2012 were investigated with regard to antimicrobial group, antimicrobial usage, and animal species. The overall amount of antimicrobials sold each year from 2003 to 2007 was 1,500 tons, after which they decreased, with the lowest sales being 936 tons in 2012. The total volume of antimicrobials used for feed additives decreased markedly by 94% from 2003 to 2012, which was mainly attributed to banning of feed additives. However, antimicrobial consumption through self prescription by farmers for disease prevention and treatment increased by 25% from 2003 to 2012. The largest volume of antimicrobials sold was for use in pigs (48~57%), followed by poultry (18~24%), fisheries (11~25%), and cattle (5~8%). Tetracycline was the highest selling antimicrobial, followed by penicillins and sulfonamides, although the overall sale of all three antimicrobials gradually decreased over the study period. This study demonstrated that the total consumption of antimicrobials has gradually decreased since 2008. Nevertheless, usage by nonprofessionals increased, which can ultimately cause emergence and spread of antimicrobial resistance. Thus, early establishment of veterinary prescription guidelines for prudent use of antimicrobials is urgently needed in Korea.
Mostrar más [+] Menos [-]A survey of the use of veterinary anesthetics in Korea
2014
Lee, J.W., Konkuk University, Seoul, Republic of Korea | Lee, J.I., Konkuk University, Seoul, Republic of Korea | Cho, Y.J., Seojeong College University, Yangju, Republic of Korea | Lee, Y.A., Shingu College University, Seongnam, Republic of Korea | Kim, J.I., Konkuk University, Seoul, Republic of Korea | Hwang, B.R., Konkuk University, Seoul, Republic of Korea | Kim, H.J., Konkuk University, Seoul, Republic of Korea | Jhun, H.J., Konkuk University, Seoul, Republic of Korea | Han, J.S., Konkuk University, Seoul, Republic of Korea
This study was conducted to investigate actual conditions associated with veterinary anesthetic drug use in Korea, and to obtain responses from Korean veterinarians and researchers pertaining to the use of anesthetic drugs. To accomplish this, a nationwide survey was issued to veterinarians working at animal hospitals and to researchers in the Korean Association for Laboratory Animal Science (KALAS). A self-administered questionnaire-based survey was then conducted in which respondents were asked questions about actual conditions associated with the use of animal anesthetic drugs. The survey revealed that the distribution and management of animal medicines in Korea was quite vulnerable to misuse or abuse due to a variety of factors. Therefore, a relevant regulatory system should be strictly enforced to protect vulnerable individuals from abuse or misuse.
Mostrar más [+] Menos [-]Bacterial strains isolated from Jeotgal (salted seafood) induce maturation and cytokine production in mouse bone marrow-derived dendritic cells
2014
Moon, S.Y., eju National University, Jeju, Republic of Korea | Park, E.J., eju National University, Jeju, Republic of Korea | Joo, H.G., eju National University, Jeju, Republic of Korea
Jeotgal (salted seafood) has been one of major fermented foods in Korea for long time. Although there are many studies about Jeotgal in various aspects of food, its immunological importance on hosts has not been elucidated yet. In this study, we investigated if several bacteria isolated from Jeotgal may modulate the function of dendritic cells (DCs), powerful antigen-presenting cells equipped with special immunological capabilities. 4 Jeotgal bacteria were selected as representatives and used for experiments. To treat viable DCs, those bacteria were killed at 60¡� for 30 min. The viability of DCs treated with Jeotgal bacteria was verified and two isolates significantly induced high production of interleukin-12, a representative cell-mediated cytokine of DCs. Surface activation and maturation markers (MHC class II, CD40, CD86) of DCs were analyzed by flow cytometer. In addition, the treated DCs showed significantly high lymphocyte stimulatory capability compared to control DCs based on allogeneic mixed lymphocyte reactions. These observations suggest that Jeotgal isolates can function as immunostimulating bacteria in hosts, like Lactobacillus. Taken together, these experimental evidences may broaden the use of Jeotgal isolates in immunological fields in addition to as a fermented food.
Mostrar más [+] Menos [-]