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Marek K 《Journal of the American Veterinary Medical Association》2008,233(2):224-225

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Report of the 3rd Havemeyer workshop on allergic diseases of the Horse, Hólar, Iceland, June 2007     

Marti E  Gerber V  Wilson AD  Lavoie JP  Horohov D  Crameri R  Lunn DP  Antczak D  Björnsdóttir S  Björnsdóttir TS  Cunningham F  Dérer M  Frey R  Hamza E  Horin P  Heimann M  Kolm-Stark G  Olafsdóttir G  Ramery E  Russell C  Schaffartzik A  Svansson V  Torsteinsdóttir S  Wagner B 《Veterinary immunology and immunopathology》2008,126(3-4):351-361

Allergic diseases occur in most mammals, although some species such as humans, dogs and horses seem to be more prone to develop allergies than others. In horses, insect bite hypersensitivity (IBH), an allergic dermatitis caused by bites of midges, and recurrent airway obstruction (RAO), a hyperreactivity to stable born dust and allergens, are the two most prevalent allergic diseases. Allergic diseases involve the interaction of three major factors: (i) genetic constitution, (ii) exposure to allergens, and (iii) a dysregulation of the immune response determined by (i) and (ii). However, other environmental factors such as infectious diseases, contact with endotoxin and degree of infestation with endoparasites have been shown to influence the prevalence of allergic diseases in humans. How these factors may impact upon allergic disease in the horse is unknown at this time. The 3rd workshop on Allergic Diseases of the Horse, with major sponsorship from the Havemeyer Foundation, was held in Hólar, Iceland, in June 2007 and focussed on immunological and genetic aspects of IBH and RAO. This particular venue was chosen because of the prevalence of IBH in exported Icelandic horses. The incidence of IBH is significantly different between Icelandic horses born in Europe or North America and those born in Iceland and exported as adults. Although the genetic factors and allergens are the same, exported adult horses show a greater incidence of IBH. This suggests that environmental or epigenetic factors may contribute to this response. This report summarizes the present state of knowledge and summarizes important issues discussed at the workshop.  相似文献   

Expression, purification and characterisation of recombinant Escherichia coli derived chicken interleukin-12     

Thomas JD  Morris KR  Godfrey DI  Lowenthal JW  Bean AG 《Veterinary immunology and immunopathology》2008,126(3-4):403-406

Zoonotic viruses, such as H5N1 Avian Influenza, pose major threats to both animals and humans, and with this in mind there is a need for the development of new anti-viral strategies. The cytokine interleukin-12 (IL-12) is known to play a pivotal regulatory role in the anti-viral response due to its role in the induction of the key anti-viral cytokine IFN-gamma. Therefore, strategies which provide a means for the production of therapeutic quantities of IL-12 may be of major benefit. Here we describe the development of biologically active Escherichia coli (E. coli) derived chicken IL-12 (ChIL-12). The single chain ChIL-12 gene was cloned into the pET32b expression vector, transformed into the BL-21 E. coli strain and expression induced with IPTG. Over expressed protein was solubilised with zwittergent detergent and isolated utilising Nickel ion affinity chromatography. Biological activity was determined as ChIL-12 stimulated proliferation of pre-treated T-cells in vitro. This study is the first example of a biologically active E. coli derived IL-12 from a non-mammalian vertebrate subsequently providing a means for testing the anti-viral therapeutic potential of ChIL-12 in an in vivo model.  相似文献   

Canine hyperplastic intraepidermal pustular and suprabasal acantholytic dermatosis with features of human pemphigus vegetans     

Heimann M  Beco L  Petein M  Nishifuji K  Amagai M  Olivry T  Olivry DT 《Veterinary pathology》2007,44(4):550-555

Pemphigus vegetans is a rare autoimmune blistering acantholytic dermatosis of humans that combines unusually hyperplastic and verrucous pustular skin lesions and mucosal erosions. We report herein the clinical, histopathologic, and immunologic findings in a dog whose lesions resembled, but were not identical to, those of human pemphigus vegetans. A 4-year-old male Greater Swiss Mountain Dog presented with multifocal cutaneous verrucous and crusted papules and pustules, as well as skin and mucosal erosions and ulcers. Microscopic lesions consisted of exophytic papillated epidermal hyperplasia, superficial and deep intraepidermal acantholytic neutrophilic and eosinophilic pustules, and suprabasal epidermal clefts leaving rounded basal keratinocytes at the bottom of the vesicles. Direct and indirect immunofluorescence revealed antikeratinocyte IgG autoantibodies. Immunoprecipitation immunoblotting and immunoabsorption experiments with recombinant canine desmogleins confirmed that autoantibodies recognized desmoglein-1. In this dog, clinical and histopathologic features resembled those of human pemphigus vegetans, while circulating autoantibodies against canine desmoglein-1 were solely identified. This antigen target is different from that of the human disease in which antidesmoglein-3 autoantibodies are detected most commonly.  相似文献   

Simulating in situ ammonia volatilization losses in the North China Plain using a dynamic soil‐crop model          下载免费PDF全文

Anna Michalczyk  Kurt Christian Kersebaum  Lisa Heimann  Marco Roelcke  Qin‐Ping Sun  Xin‐Ping Chen  Fu‐Suo Zhang 《植物养料与土壤学杂志》2016,179(2):270-285

Ammonia (NH₃) volatilization is an important N loss pathway in intensive agriculture of the North China Plain (NCP). Simulation models can help to assess complex N and water processes of agricultural soil–crop systems. Four variations (Var) of a sub‐module for the deterministic, process‐based HERMES model were implemented ranging from simple empirical functions (Var 3 and 4) to process‐oriented approaches (Var 1 and 2) including the main processes of NH₃ volatilization, urea hydrolysis, nitrification from ammonium‐based N fertilizer, and changes in soil solution pH. Ammonia volatilization, plant growth, and changes in ammonium and nitrate pools in the soil over several winter wheat–summer maize double‐crop rotations at three locations in the NCP were simulated. Results were calibrated with two data sets (Dongbeiwang 1, Shunyi) and validated using two data sets (Dongbeiwang 2, Quzhou). They showed that the ammonia volatilization sub‐module of the HERMES model worked well under the climatic and soil conditions of N China. Although the simpler equations, Var 3 and 4, showed lower deviations to observed volatilization across all sites and treatments with a mean absolute error (MAE) of 1.8 and 1.4 in % of applied N, respectively, compared to process‐oriented approaches, Var 1 and 2, with a MAE of 2.2 and 1.9 in % of applied N, respectively. Environmental conditions were reflected better by the process‐oriented approaches. Generally, simulation results were satisfying but simulated changes in topsoil pH need further verification with measurements.  相似文献   

Antinociceptive and side-effects of hydromorphone after subcutaneous administration in cats     

Robertson SA  Wegner K  Lascelles BD 《Journal of Feline Medicine and Surgery》2009,11(2):76-81

The subcutaneous (SC) route is often chosen for drug administration in cats because it is easier to perform than intravenous (IV) injection and is perceived as less painful than intramuscular (IM) injection. However, little is known of how the route of administration influences the pharmacodynamics of drugs. This study measured the changes in skin temperature and thermal threshold (TT) and recorded the side-effects after SC injection of 0.1mg/kg of hydromorphone in six cats. Time to peak TT was 105min. Skin temperature was elevated at 15min and between 45 and 360min. Five cats vomited and two exhibited marked dysphoria. Compared to previously published studies of IV and IM administration of hydromorphone, the SC route results in a slower onset of peak effect, a shorter duration of antinociception and is associated with more undesirable side-effects. As with IV and IM injections, SC administration of hydromorphone at 0.1mg/kg is associated with a significant elevation in skin temperature. Overall, the SC route appears to have the least utility.  相似文献   

Intensive blood glucose control is safe and effective in diabetic cats using home monitoring and treatment with glargine     

Kirsten Roomp  Jacquie Rand 《Journal of Feline Medicine and Surgery》2009,11(8):668-682

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Ginkgo biloba Does—and Does Not—Prevent Acute Mountain Sickness     

Guy Leadbetter  Linda E. Keyes  Kirsten M. Maakestad  Sheryl Olson  Martha C. Tissot van Patot  Peter H. Hackett 《The Forestry Chronicle》2009,20(1):66-71

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微粉碎设备—高速锤片式粉碎机     

Mark Heimann 《饲料研究》2010,(3)

<正>1锤片式粉碎机和超微粉碎机与超微粉碎机相比,锤片式粉碎机效率高、发热少且吸尘要求低。根据饲料配方和粉碎细度,装有普通硬合金锤片和圆孔筛的锤片式粉碎机的维护费用通常是0.02～0.1美元/t,电力成本约0.25～1美元/t。而超微粉碎机消耗2～4美元/t或更多,在许多情况下,零件磨损费超过0.25美元/t。  相似文献   

Is feline acquired reactive perforating collagenosis a wound healing defect? Treatment with topical betamethasone and halofuginone appears beneficial     

Luc Beco  Marianne Heimann  Thierry Olivry 《Veterinary dermatology》2010,21(4):434-436

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