Ecological limits and climate change     

Eric J. Gustafson 《Landscape Ecology》2009,24(1):147-148

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规模化猪场猪支原体肺炎控制及净化技术研究   总被引：10，自引：0，他引：10  

张道永  林毅  冯金传 《中国预防兽医学报》2000,22(1):71-72

在四川蒲江某规模化８养猪场 ,对该场的猪支原体肺炎采用以监测、免疫为主,隔离、治 疗、淘汰、消毒等综合防制技术进行控制与净化,对全场有猪支原体肺炎症状的猪及可疑病猪进行隔治疗,治愈后的猪经与易感猪同居感染不发病,分离猪肺炎支原体为阴性,试验表明治愈后的猪不带菌。对全场种猪和后备健康猪群进行猪支原体肺炎疫苗的免疫接种,经抗体监测和攻毒试验,免疫后２４０天猪支原体肺炎的ＩＨＡ抗体仍可达到１：１０,保护率  相似文献   

Characterisation of a novel Mannheimia sp from Australian feedlot cattle     

PJ BLACKALL  Ø ANGEN  N FEGAN  LL BLACKALL  R MUTTERS  M BISGAARD 《Australian veterinary journal》2001,79(9):634-639

OBJECTIVE: To characterise eight isolates of a Gram-negative organism obtained from the upper respiratory tract of cattle showing evidence of mild upper respiratory tract disease. DESIGN: The isolates were compared with the five recognised species within the genus Mannheimia - M haemolytica, M glucosida, M granulomatis, M ruminalis and M varigena--using a range of phenotypic and genotypic methods. RESULTS: Phenotypic characterisation indicated that the isolates belonged to the trehalose-negative [Pasteurella] haemolytica complex. This complex has recently been reorganised into five species within the new genus Mannheimia. Ribotyping performed using HindIII and a computerised analysis system indicated that the eight Australian isolates formed a distinct cluster that was related to, but different from, the five recognised species of Mannheimia. The 16S rRNA sequence of one isolate (BNO311) was determined and a phylogenetic analysis performed. Isolate BNO311 was distinct from the five named Mannheimia spp but did join a larger cluster consisting of rRNA cluster IV (M varigena) and the unnamed rRNA cluster V of Mannheimia. DNA:DNA hybridisation between isolate BNO311 and M haemolytica NCTC 9380T, M granulomatis P411 and Actinobacillus ligniersii NCTC 4189T all suggested similarities of approximately 30%. CONCLUSIONS: These phenotypic and genotypic characterisation studies suggest that the eight Australian isolates represent a new species of Mannheimia. Until further characterisation studies are performed, we are unwilling to propose a name for this taxon, preferring to refer to this possible new species as Bisgaard taxon 39 of cluster V of Mannheimia.  相似文献   

GROWTH OF THE BOVINE PLEUROPNEUMONIA ORGANISM MYCOPLASMA MYCOIDES var. MYCOIDES, IN THE EMBRYONATED HEN EGG     

P. Elek  LL.D  B.V.Sc. G. S. Cottew  B.Sc. 《Australian veterinary journal》1961,37(5):163-168

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In vivo demonstration of lability of hog cholera virus to lipolytic agents   总被引：1，自引：0，他引：1  

G E McKissick  D P Gustafson 《American journal of veterinary research》1967,28(125):909-914

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Using expert opinion to identify risk factors important to infectious salmon-anemia (ISA) outbreaks on salmon farms in Maine, USA and New Brunswick, Canada     

Gustafson LL  Ellis SK  Bartlett CA 《Preventive veterinary medicine》2005,70(1-2):17-28

Thirty industry or regulatory professionals, with extensive experience in the local infectious salmon-anemia (ISA) epidemic, were queried on their opinions regarding the spread and impact of ISA in Maine, USA and New Brunswick, Canada. Subjective probability-estimation techniques were used to elicit likelihood ratios (LR) for risk factors of potential relevance to the epidemic. Experts were asked to answer questions based on their direct and local experience with ISA, rather than through knowledge gained from scientific references or experience in other regions. The results found the strongest independent predictors of ISA infection to include (1) a site's proximity to other farms with clinically infected fish, (2) a previous history of ISA on the site, (3) whether a site fallows for a month or more between year classes and (4) whether the site employs harvest vessels practicing full containment of blood and stun water. The strongest predictors of ISA severity included (1) stocking density, (2) the length of time between infection and removal of infected fish, (3) whether fish are moved between pens (after infection) and (4) a farm's sea-lice (Lepeophtheirus salmonis) status. Experts believed that transmission of ISA virus during the local epidemic was influenced by proximity (spatial and temporal) to activities resulting in large-scale shedding of virus into a shared water column, and that severity of infection corresponded more to infected-fish removal practices and certain husbandry decisions. Personnel and equipment biosecurity measures were not seen as strong predictors of either infection or severity in this analysis, though their perceived level of importance was greater among government than industry experts.  相似文献   

Tibial plateau leveling osteotomy in a llama with a ruptured cranial cruciate ligament     

Ray WM  Gustafson SB  Huber MJ 《Journal of the American Veterinary Medical Association》2004,225(11):1739-42, 1702

A 3-year-old 155-kg (342-lb) castrated male llama was examined because of left hind limb lameness of acute onset. A diagnosis of cranial cruciate ligament and medial collateral ligament rupture was made, and tibial plateau leveling osteotomy was recommended. The tibial plateau leveling osteotomy procedure was performed as described for dogs, except that 2 orthopedic plates were used to stabilize the osteotomy because of the size of the llama. The medial collateral ligament was sutured and reinforced with 2 strands of size-2 polypropylene placed in a figure-8 fashion between cancellous bone screws in the femur and tibia. Four days after surgery, failure of the medial collateral ligament repair was evident. Approximately 3.5 years after surgery, the llama was reexamined. The owners reported that the llama had full use of its left hind limb, and only mild lameness (grade 1 of 5) was evident. Results suggest that tibial plateau leveling osteotomy may be applicable in camelids with rupture of the cranial cruciate ligament. However, additional study is needed before tibial plateau leveling osteotomy can be routinely recommended. In particular, additional information is needed on the tibial plateau slope in healthy camelids, the role of the fibula in tibial plateau leveling osteotomy procedures, and the prevalence of cranial cruciate ligament rupture in camelids.  相似文献   

Radiation therapy for the treatment of urethral sarcoma in a cria     

Gustafson NR  Severidt J  Van Metre DC  Schultheiss PC  Larue SM  Callan RJ 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2005,19(2):271-274

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Limited sampling pharmacokinetics of subcutaneous ondansetron in healthy geriatric cats,cats with chronic kidney disease,and cats with liver disease          下载免费PDF全文

R. L. Fitzpatrick  L. A. Wittenburg  R. J. Hansen  D. L. Gustafson  J. M. Quimby 《Journal of veterinary pharmacology and therapeutics》2016,39(4):350-355

Ondansetron, a 5‐HT₃ receptor antagonist, is an effective anti‐emetic in cats. The purpose of this study was to compare pharmacokinetics of subcutaneous (SQ) ondansetron in healthy geriatric cats to cats with chronic kidney disease (CKD) or liver disease using a limited sampling strategy. 60 cats participated; 20 per group. Blood was drawn 30 and 120 min following one 2 mg ( mean 0.49 mg/kg , range 0.27–1.05 mg/kg ) SQ dose of ondansetron. Ondansetron concentrations were measured by liquid chromatography coupled to tandem mass spectrometry. Drug exposure represented as area under the curve (AUC) was predicted using a limited sampling approach based on multiple linear regression analysis from previous full sampling studies, and clearance (CL/F) estimated using noncompartmental methods. Kruskal–Wallis anova was used to compare parameters between groups. Mean AUC (ng/mL·h) of subcutaneous ondansetron was 301.4 (geriatric), 415.2 (CKD), and 587.0 (liver). CL/F (L/h/kg) of SQ ondansetron was 1.157 (geriatric), 0.967 (CKD), and 0.795 (liver). AUC was significantly higher in liver and CKD cats when compared to geriatric cats (P < 0.05). CL/F in liver cats was significantly decreased (P < 0.05) compared to geriatric cats. In age‐matched subset analysis, AUC and CL/F in liver cats remained significantly different from geriatric cats.  相似文献   

Amplified fragment length polymorphism-based genetic diversity among cultivated and weedy rye (Secale cereale L.) accessions     

T. Chikmawati  M. Miftahudin  B. Skovmand  J. Perry Gustafson 《Genetic Resources and Crop Evolution》2012,59(8):1743-1752

Amplified fragment length polymorphism markers were evaluated to determine the genetic diversity and relationships among cultivated and weedy ryes (Secale cereale L.) using a large global set of accessions. On the basis of 395 polymorphic bands resulted from nine PstI-MseI primer combinations, cultivated rye exhibited higher average genetic diversity (H_t?=?0.34) than that of the weedy rye (H_t?=?0.27), however, it had lower genetic differentiation (F_st?=?0.16). The average genetic diversity of cultivated rye varied from region to region ranging from 0.21 to 0.31. As expected, all cultivated accessions clustered together both in dendrogram and principal coordinate diagram indicating common breeding program selection criteria based on similar value-added agronomic characteristics. A clustering of cultivated rye accessions into groups based strictly on geographical origin was not found. The relationships among cultivated, weedy and wild ryes were discussed.  相似文献