A moment of SCIENCE . . . Please!     

Brian C. Gilger  Ellison Bentley 《Veterinary ophthalmology》2008,11(5):279-279

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A comparison of florfenicol and tulathromycine for the treatment of undifferentiated fever in feedlot calves     

Perrett T  Abutarbush SM  Wildman BK  Fuchs MT  Schunicht OC  Pollock CM  Fenton RK  Jim GK  Guichon PT  Booker CW  Berg J  Roder J  Spire M 《Veterinary therapeutics : research in applied veterinary medicine》2008,9(2):128-140

The purpose of this study was to compare the relative cost-effectiveness of florfenicol with that of tulathromycin for treatment of undifferentiated fever (UF) in feedlot calves at ultra-high risk of developing UF that receive metaphylactic tulathromycin on arrival at the feedlot. Calves that received therapeutic florfenicol had lower overall mortality (P=.045) and bovine respiratory disease mortality (P=.050) compared with calves that received therapeutic tulathromycin, but no significant differences were detected in feedlot performance, carcass characteristics, or other animal health variables. There was a net advantage of Can$41.19/treated animal in the florfenicol group versus the tulathromycin group. This study demonstrates that it is more cost-effective to use florfenicol than tulathromycin for the initial treatment of UF in feedlot calves at ultra-high risk of developing UF that receive on-arrival metaphylactic tulathromycin.  相似文献   

Efficacy of bentonite clay in ameliorating aflatoxicosis in piglets fed aflatoxin contaminated diets     

Thieu NQ  Ogle B  Pettersson H 《Tropical animal health and production》2008,40(8):649-656

The efficacy of locally produced bentonite was evaluated with respect to ameliorating the adverse effects of aflatoxins (AF) in piglets fed AF contaminated diets. Forty eight piglets were randomly assigned to one of four treatments: 1) 0 g of bentonite and 0 μg AF/kg feed (control); 2) 4 g of bentonite plus 200 μg AF/kg feed (AF + Bento 4); 3) 5 g of bentonite plus 200 μg AF/kg feed (AF + Bento 5) and 4) 0 g of bentonite plus 200 μg AF/kg feed (AFA). Piglets in the AFA treatment had lower overall average daily weight gain (ADG), feed conversion efficiency, albumin (ALB) and total protein (TP) compared to the control diet, while mean serum leukocyte and enzyme activities (glutamic-oxalacetic transaminase (GOT), glutamic-pyruvic transaminase (GPT), gamma glutamyltransferase (GGT), alkaline phosphate (ALP) and lactic dehydrogenase (LDH)) were significant increased. The inclusion of bentonite at 0.4% or 0.5% in the AF contaminated diet restored the lower performance, feed efficiency and abnormal blood profiles of the piglets given AF and no differences between 0.4 and 0.5% inclusion of bentonite. The findings in the present study provide critically needed confirmation that bentonite has the ability to reduce the adverse effects of AF.  相似文献   

家禽整齐度对加工企业利益的重要影响     

Brian Cosgriff  林又米 《中国家禽》2008,30(18)

多年以来,家禽育种公司一直追求的整齐度是希望用以提高生产性能,而现在整齐度已成为加工企业最大利益的决定性因素.大多数客户如快餐企业、餐饮服务行业以及零售商们对鸡肉产品的要求日益严格,因此对于加工企业来说如果家禽尺寸不符合要求就意味着无法获利.如果他们一旦接受了这些不符合要求的家禽产品,就需要为此支付额外的费用将这些产品运送到另外的工厂进行修整.  相似文献   

Evaluation and comparison of the health status of Atlantic bottlenose dolphins from the Indian River Lagoon, Florida, and Charleston, South Carolina     

Reif JS  Fair PA  Adams J  Joseph B  Kilpatrick DS  Sanchez R  Goldstein JD  Townsend FI  McCulloch SD  Mazzoil M  Zolman ES  Hansen LJ  Bossart GD 《Journal of the American Veterinary Medical Association》2008,233(2):299-307

OBJECTIVE: To conduct health assessments and compare outcomes in 2 populations of Atlantic bottlenose dolphins. Design-Repeated cross-sectional study. ANIMALS: 171 Atlantic bottlenose dolphins. PROCEDURES: During June and August of 2003 through 2005, 89 dolphins from the Indian River Lagoon (IRL), Florida, and 82 dolphins from estuarine waters near Charleston, SC, were evaluated. A panel of 5 marine mammal veterinarians classified dolphins as clinically normal, possibly diseased, or definitely diseased on the basis of results of physical and ultrasonographic examinations, hematologic and serum biochemical analyses, and cytologic and microbiologic evaluations of gastric contents and swab specimens. RESULTS: Prevalence of dolphins classified as definitely diseased did not differ significantly between the IRL (32%) and Charleston (20%) sites. Proportions of dolphins classified as possibly diseased also did not differ. Lobomycosis was diagnosed in 9 dolphins from the IRL but in none of the dolphins from Charleston. Proportions of dolphins with orogenital papillomas did not differ significantly between the IRL (12%) and Charleston (7%) sites. From 2003 through 2005, the proportion classified as definitely diseased tripled among dolphins from the Charleston site but did not increase significantly among dolphins from the IRL. Dolphins from the Charleston site were more likely to have leukocytosis, lymphocytosis, and low serum concentrations of total protein and total J-globulins than were dolphins from the IRL. CONCLUSIONS AND CLINICAL RELEVANCE: High prevalences of diseased dolphins were identified at both sites; however, the host or environmental factors that contributed to the various abnormalities detected are unknown.  相似文献   

Acquired pulmonary artery stenosis in four dogs     

Scansen BA  Schober KE  Bonagura JD  Smeak DD 《Journal of the American Veterinary Medical Association》2008,232(8):1172-1180

CASE DESCRIPTION: 4 dogs with acquired pulmonary artery stenosis (PAS) were examined for various clinical signs. One was a mixed-breed dog with congenital valvular PAS that subsequently developed peripheral PAS, one was a Golden Retriever with pulmonary valve fibrosarcoma, one was a Pembroke Welsh Corgi in which the left pulmonary artery had inadvertently been ligated during surgery for correction of patent ductus arteriosus, and one was a Boston Terrier with a heart-base mass compressing the pulmonary arteries. CLINICAL FINDINGS: All 4 dogs were evaluated with 2-dimensional and Doppler echocardiography to characterize the nature and severity of the stenoses; other diagnostic tests were also performed. TREATMENT AND OUTCOME: The mixed-breed dog with valvular and peripheral PAS was euthanized, surgical resection of the pulmonic valve mass was performed in the Golden Retriever, corrective surgery was performed on the Pembroke Welsh Corgi with left pulmonary artery ligation, and the Boston Terrier with the heart-base mass was managed medically. CLINICAL RELEVANCE: Acquired PAS in dogs may manifest as a clinically silent heart murmur, syncope, or right-sided heart failure. The diagnosis is made on the basis of imaging findings, particularly results of 2-dimensional and Doppler echocardiography. Treatment may include surgical, interventional, or medical modalities and is targeted at resolving the inciting cause.  相似文献   

Broiler embryo bone development is influenced by incubator temperature,oxygen concentration and eggshell conductance at the plateau stage in oxygen consumption1     

Dr E.O. Oviedo-Rondón  J. Small  M.J. Wineland  V.L. Christensen  P.S. Mozdziak  M.D. Koci 《British poultry science》2008,49(6):666-676

1. Four experiments were conducted to evaluate the effects of temperature (TEM) and oxygen (O₂) concentrations during the last 4 d of incubation on bone development. Fertile eggs from two strains were obtained that either exhibited Low or High eggshell conductance (G).

2. Four experimental cabinets provided either four TEM (36, 37, 38 or 39^°C) or four O₂ concentrations (17, 19, 21 or 23% O₂). Data were analysed as a 2 × 2 factorial design. In the fourth experiment, two temperatures (36 and 39^°C), two O₂ concentrations (17 and 23%) and the same Low and High G strains were evaluated in a 2 × 2 × 2 factorial design.

3. Body weights (BW) and residual yolks were obtained, both legs were dissected. Femur, tibia and shank weights, length and thickness were recorded. Relative asymmetry (RA) of each leg section was calculated.

4. The results indicated that elevated TEM during incubation increased RA between the two legs, mainly in the Low G strain. Chickens at the lowest O₂ concentrations had lighter and shorter tibias, lighter shanks, and increased RA of femur length compared to chickens in the 23% O₂. In the fourth experiment no interactions were observed between O₂ and TEM. High TEM depressed BW of Low G broilers, but no significant effect of treatments was observed on BW of High G broilers. Nevertheless, the high TEM or low O₂ independently caused reduced femur and tibia weights and length, shank length and thickness, and both low O₂ and high TEM together increased RA in shank weight.

5. These results suggest that late incubation conditions affect long bone development in broilers.  相似文献   

Nitrogen fertilization during planting and establishment of the urban forest: A collection of five studies   总被引：1，自引：0，他引：1  

J. Roger Harris  Susan D. Day  Brian Kane   《Urban Forestry & Urban Greening》2008,7(3):195-206

Today's urban forest increasingly consists of planted trees, especially as native forest fragments yield to urban sprawl. These trees are usually larger (over 2-m tall) than typical reforestation trees and grow very little for the first few years after planting. Stressful urban sites exacerbate this effect and many practitioners hope to shorten the time required to reach environmentally functional size by fertilizing at planting. This is a controversial practice since nitrogen (N) application creates the potential for water quality impairment and effectiveness is uncertain. It is not clear how nitrogen application affects large trees with radically altered root:shoot ratios or how nursery production methods and restrictive sites affect response. In a series of five separate studies, we tested several N rates on ten shade tree species (both field- and container-grown) and transplanted to a range of urban sites, from a relatively undisturbed forest fragment to a highly compacted cutover soil with an absent A horizon. Trunk diameter increase, as an integrative metric of tree biomass accumulation, was followed for up to 4 years on each experiment. Overall, we saw little effect from fertilizing at planting at any rate we tested, regardless of location. Three studies that included leaf analysis with a SPAD-502 chlorophyll meter indicated that neither SPAD meter values or N concentration within leaves was increased by fertilizing at planting, suggesting that the newly planted shade trees took up very little of the applied N. Overall, SPAD-502 readings correlated well with actual leaf N concentration (r=0.692). This group of studies indicates that fertilization at planting does not increase post-transplant growth, even in stressful urban sites and it is therefore not effective at shortening the establishment period of transplanted shade trees.  相似文献   

Immunology of the ocular surface.     

Brian C Gilger 《Veterinary Clinics of North America: Small Animal Practice》2008,38(2):223-31, v

The ocular surface immunity is a remarkable combination of the innate immune and adaptive immune systems, designed to prevent microbial invasion while minimizing damage to delicate ocular tissue. The innate immune system uses a variety of methods to minimize microorganism invasion, including mechanical tissue barriers and production of antimicrobial peptides. Tolerance of normal ocular flora is achieved by the presence of a minimal number of professional antigen presenting cells, immunosuppressive substances in tears, and the strategic intra- and intercellular location of the Toll-like receptors. Autoimmune diseases are common on the ocular surface, and with contributions of environmental and genetic factors, autoantigens are presented to the adaptive immune response. Toll-like receptors are the link between the innate and adaptive immune response, and are likely key components of the response of ocular tissue to infectious organisms and in the initiation and perpetuation of autoimmune disease.  相似文献   

Proliferative dermatitis in a loggerhead turtle, Caretta caretta, and a green turtle, Chelonia mydas, associated with novel papillomaviruses     

Manire CA  Stacy BA  Kinsel MJ  Daniel HT  Anderson ET  Wellehan JF 《Veterinary microbiology》2008,130(3-4):227-237

A subadult loggerhead turtle, Caretta caretta, presented with generalized small, white, raised lesions over its neck, shoulders, and all four flippers. A juvenile green turtle, Chelonia mydas, recently treated for fibropapillomatosis, presented with four similar localized lesions on one flipper. To diagnose the conditions, biopsies of the lesions were taken for histopathology, electron microscopy, and molecular diagnostics. Histopathologic findings were similar in the two turtles and skin lesions were characterized by multifocal areas of epidermal hyperplasia accompanied by variation and abnormalities in the nuclear morphology of keratinocytes and a few intranuclear inclusions in some cells. Transmission electron microscopy revealed multiple epithelial cells with large intranuclear aggregates of virions consistent in morphology with papillomavirus. Papillomavirus was detected in samples from both turtles by polymerase chain reaction (PCR). Sequence analysis of the partial sequence of the papillomavirus E1 gene revealed two viruses (CcPV and CmPV) that were distinct from each other and from other species in Papillomaviridae, and likely represent two novel species and perhaps a new genus.  相似文献