Post mortem survey of dental disorders in 349 donkeys from an aged population (2005-2006). Part 2: epidemiological studies     

Du Toit N  Gallagher J  Burden FA  Dixon PM 《Equine veterinary journal》2008,40(3):209-213

REASON FOR PERFORMING STUDY: Dental disorders have recently been recognised as having major clinical and welfare implications in donkeys. However, no investigation appears to have examined the association of dental disorders with managemental factors and any intercurrent illness. OBJECTIVES: To determine the association of dental disorders observed in a post mortem study with age group, body condition score, time since last dental treatment, feeding and the illness that necessitated euthanasia or caused death. METHODS: A prospective study documented the type and prevalence of dental disorders in 349 mainly aged donkeys (median estimated age of 31 years) that were subjected to euthanasia over an 18 month period in 2005'Aì2006. The estimated age, body condition score, supplemental feed status, time since last dental treatment and nature of the intercurrent disease that necessitated euthanasia or caused death were also recorded. Multivariable analysis was performed to examine associations of these factors with specific dental disorders and between specific dental disorders. RESULTS: There was a high prevalence (93.4%) of significant dental disease. Age group was significantly associated with the presence of dental disorders and an older age range was a high risk factor for the presence of cheek teeth (CT) diastemata. There was a significant association between the presence of CT diastemata and the concurrent presence of displaced, missing and worn CT. There was also a significant association between the presence of diastemata and colic. CONCLUSIONS AND POTENTIAL RELEVANCE: Aged donkeys have a high prevalence of dental disorders especially of CT diastemata. Dental disorders and, in particular, the presence of CT diastemata were significantly associated with colic. Routine, prophylactic dental treatments should be performed, especially in aged donkeys.  相似文献   

Risk factors for subclinical hypocalcaemia,and associations between subclinical hypocalcaemia and reproductive performance,in pasture-based dairy herds in New Zealand     

KI Roberts  S McDougall 《New Zealand veterinary journal》2019,67(1):12-19

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Case control study to investigate risk factors for impaction colic in donkeys in the UK     

Ruth Cox  Faith Burden  Lee Gosden  Christopher Proudman  Andrew Trawford  Gina Pinchbeck 《Preventive veterinary medicine》2009,92(3):179

Impaction colic is the single most common type of colic diagnosed in a large population of donkeys (more than 2000 animals) at The Donkey Sanctuary, UK and the fatality rate from the disease is high. Here we identify risk factors for impaction colic in this population during 2006 using an unmatched case control study. There were 71 cases of impaction colic and multivariable analysis identified a number of variables associated with the disease. Management factors that increased the risk of impaction included paper bedding, feeding of concentrates, limited access to pasture and increasing number of carers. In addition health variables that were associated with an increased risk of impaction colic were weight loss, recent vaccination and a number of dental abnormalities. This study has identified variables which may help to identify donkeys at high risk of impaction colic; those with a history of weight loss and with concurrent dental pathology. Furthermore the study has also identified a number of variables that may be targeted to reduce the incidence of impaction colic in this donkey population, such as modification of concentrate feeding practices and pasture access.  相似文献   

川西亚高山森林凋落物中大量养分元素的年和月动态   总被引：11，自引：0，他引：11  

YANG Wan-Qin  WANG Kai-Yun  S. KELLOM&#;KI  ZHANG Jian 《土壤圈》2006,16(6):788-798

Macronutrients （N, P, K, Ca, Mg, and S） in litter of three primarily spruce （Picea purpurea Masters） （SF）, fir （Abies faxoniana Rehder ＆ E. H. Wilson） （FF）, and birch （Betula platyphylla Sukaczev） （BF） subalpine forests in western China were measured to understand the monthly variations in litter nutrient concentrations and annual and monthly nutrient returns via litteffall. Nutrient concentration in litter showed the rank order of Ca 〉 N 〉 Mg 〉 K 〉 S 〉 P. Monthly variations in nutrient concentrations were greater in leaf litter （LL） than other litter components. The highest and lowest concentrations of N, P, K, and S in LL were found in the growing season and the nongrowing season, respectively, but Ca and Mg were the opposite. Nutrient returns via litterfall showed a marked monthly pattern with a major peak in October and one or two small peaks in February and/or May, varying with the element and stand type, but no marked monthly variations in nutrient returns via woody litter, reproductive litter, except in May for the BF, and moss litter. Not only litter production but also nutrient concentration controlled the annual nutrient return and the monthly nutrient return pattern. The monthly patterns of the nutrient concentration and return were of ecological importance for nutrient cycling and plant growth in the subalpine forest ecosystems.  相似文献   

Comparison of working equid welfare across three regions of Mexico     

Emily Haddy  Faith Burden  Omar Prado-Ortiz  Humberto Zappi  Zoe Raw  Leanne Proops 《Equine veterinary journal》2021,53(4):763-770

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Haemosiderin deposition in Donkey (Equusasinus) liver: Comparison of liver histopathology with liver iron content     

P.J. Brown  T.J. Whitbread  F.A. Burden 《Research in veterinary science》2011,90(2):275-279

Histopathological examination was carried out on post mortem samples of liver from 12 donkeys (Equus asinus), aged 21-57 years (4 females, 1 stallion, 7 geldings). Variable amounts of haemosiderin were present in Kupffer cells, portal macrophages and hepatocytes in all cases. In all cases there was infiltration of connective tissue around portal tracts by variable numbers of inflammatory cells (lymphocytes, plasma cells and macrophages) but obvious portal fibrosis was present in only four animals. Subjective assessment of overall haemosiderin staining (including extent and intensity) generally reflected biochemical measurements of liver iron content (measured by an inductively-coupled plasma method) as well as quantitative histochemical measurements (using an image analysis package and sections stained with Perl’s Prussian blue stain). Accumulation of hepatic iron in old donkeys was not directly related to other pathological changes and may be an incidental finding.  相似文献   

棉花枯萎病抑菌土生物抑菌的研究   总被引：1，自引：0，他引：1  

曹桂艳  叶景凯  李长兴 《辽宁农业科学》2001,(2):31-32

主要通过对种植抗病棉抗病棉花品种连作10年和5年枯萎病圃土样进行盆栽和田间小区试验。试验结果表明，连作10年以上枯萎病圃田间抑菌效果50．99％，连作5年枯萎病圃 抑菌效果17．18％。上述结果证明了枯萎病圃衰退的主要病因是棉花枯萎病菌抑菌土的产生和存在。另外，抑菌土经高压灭菌后抑菌效果完全消失，这一现象说明是生物因子的抑菌起主导作用。  相似文献   

CHARACTERIZATION OF PHYSIOLOGIC 18F‐FDG UPTAKE WITH PET‐CT IN DOGS     

MIN‐SU LEE  AH‐RA LEE  MI‐AE JUNG  IN‐HYE LEE  JI‐HYE CHOI  HYUN‐WOO CHUNG  SOON‐WUK JEONG  SANG‐SOEP NAHM  KI‐DONG EOM 《Veterinary radiology & ultrasound》2010,51(6):670-673

We evaluated the whole body distribution of 2‐deoxy‐2‐[18F]fluoro‐d ‐glucose (¹⁸F‐FDG) in seven beagle dogs using positron emission tomography/computed tomography. The mean and maximum standard uptake values (SUV) for various tissues were computed. The SUV of the aortic blood pool was 0.65±0.19. Moderate uptake was present in brain (3.40±1.01). Mild uptake was present in orbital muscles, soft palate, laryngeal and pharyngeal region, mandibular salivary gland, myocardium, liver, pancreas, kidney, and intestine. ¹⁸F‐FDG uptake would be normally higher in these tissues because of normal physiologic activity. Mean and maximum SUV values of the eye, skeletal muscle, bone tissue, spleen, adrenal gland, stomach, tongue, gall bladder, and lung were similar to or lower than that of the aortic blood pool. These data provide a normal baseline for comparing pathologic ¹⁸F‐FDG uptake.  相似文献   

Selected health and management issues facing working donkeys presented for veterinary treatment in rural Mexico: some possible risk factors and potential intervention strategies     

Faith A. Burden  Nicole Du Toit  Mariano Hernandez-Gil  Omar Prado-Ortiz  Andrew F. Trawford 《Tropical animal health and production》2010,42(4):597-605

The examination of 216 donkeys presented for treatment at the Donkey Sanctuary–World Horse Welfare–Universidad Nacional Autonoma de Mexico mobile clinics revealed a number of health and welfare problems. A general overview of the donkeys’ health was made and showed that the median body condition score (BCS) in this population was 2.5. Underweight animals only accounted for 26% of the population. Females, 0–5-year-olds and >21-year-olds, were more likely to be underweight. When analysed, there was no correlation between faecal worm egg count (FEC) and BCS. The prevalence of strongyle infection as assessed by FEC was shown to be 80% with a median FEC of 600 eggs per gramme. Donkeys were assessed for body lesions and showed a high prevalence (71%), particularly in the facial region (54%). Analysis showed that mature animals (6–15 years old) were at increased risk of body lesions compared to older animals (16+ years old) as were donkeys with dental disease and those in particular villages. Risk factor analysis for lesions of the face showed that stallions and geldings are at increased risk as were donkeys wearing halters made from nylon rope. This study has identified areas for further investigation and potential areas where targeted interventions may be made to improve the health and welfare of working donkeys in Mexico.  相似文献   

Administration of deslorelin or hCG at the time of embryo transfer: effect on pregnancy rates in recipient mares     

P.M. McCue  L.K. Arnold  B.S. Carroll  C.A. Burden  D.M. Gragg  D.B. Scofield  J.N. Hatzel  R.A. Ferris 《Journal of Equine Veterinary Science》2012

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