Incompatibility Between the Dimorphic Flowers of Collomia grandiflora, a Cleistogamous Species     

Lord EM  Eckard KJ 《Science (New York, N.Y.)》1984,223(4637):695-696

The cleistogamous species Collomia grandiflora produces dimorphic cross-incompatible flowers on a single plant. The open or chasmogamous flower has smaller, flask-shaped stigmatic papillae, larger pollen grains, longer styles, and faster pollen tube growth rates down the style than the closed or cleistogamous flower. In intermorph crosses, pollen tube growth rates are greatly decreased and fertilization does not occur.  相似文献   

Use of group-randomized trials in pet population research     

Lord LK  Wittum TE  Scarlett JM 《Preventive veterinary medicine》2007,82(3-4):167-175

Communities invest considerable resources to address the animal welfare and public health concerns resulting from unwanted pet animals. Traditionally, research in this area has enumerated the pet-owning population, described pet population dynamics in individual communities, and estimated national euthanasia figures. Recent research has investigated the human–animal bond and explored the community implications of managed feral cat colonies. These reports have utilized traditional epidemiologic study designs to generate observational data to describe populations and measure associations. However, rigorous scientific evaluations of potential interventions at the group level have been lacking. Group-randomized trials have been used extensively in public health research to evaluate interventions that change a population's behavior, not just the behavior of selected individuals. We briefly describe the strengths and limitations of group-randomized trials as they are used to evaluate interventions that promote social and behavioral changes in the human public health field. We extend these examples to suggest the appropriate application of group-randomized trials for pet population dynamics research.  相似文献   

Origin of resistance to pyrethroids in the redlegged earth mite (Halotydeus destructor) in Australia: repeated local evolution and migration     

Qiong Yang  Paul A Umina  Gordana Ra&#x;i&#x;  Nicholas Bell  Jichao Fang  Alan Lord  Ary A Hoffmann 《Pest management science》2020,76(2):509-519

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Pain management in horses and farm animals     

Alexander Valverde  DVM  DVSc  DACVA    Cornelia I. Gunkel  Dr. med. vet.  MRCVS 《Journal of Veterinary Emergency and Critical Care》2005,15(4):295-307

Objective: This review discusses the different analgesic drugs and routes of administration used in large animals for acute pain management. General guidelines and doses are given to assist in choosing techniques that provide effective analgesia. Etiology: Noxious stimuli are perceived, recognized, and localized by specialized sensory systems located at spinal and supraspinal levels. Diagnosis: Localizing the source of the noxious stimulus as well as understanding the behavioral aspects and physiological changes that result from such insult is important to adequately diagnose and treat pain. Pain assessment is far from being definite and objective; not only are there species differences, but also individual variation. In addition, the behavioral and physiological manifestations vary with the acute or chronic nature of pain. Therapy: Pain management should include (1) selecting drugs that better control the type of pain elicited by the insult; (2) selecting techniques of analgesic drug administration that act on pathways or anatomical locations where the nociceptive information is being processed or originating from; (3) combining analgesic drugs that act on different pain pathways; and (4) provide the best possible comfort for the animal. Prognosis: Providing pain relief improves the animal's well being and outcome; however, interpreting and diagnosing pain remains difficult. Continuing research in pain management will contribute to the evaluation of the pathophysiology of pain, pain assessment, and newer analgesic drugs and techniques.  相似文献   

Hemeralopia in dogs: heredity of hemeralopia in Alaskan Malamutes   总被引：2，自引：0，他引：2  

L F Rubin  T K Bourns  L H Lord 《American journal of veterinary research》1967,28(123):355-357

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Pleural, Extrapleural and Pulmonary Lesions in Small Animals: A Radiographic Approach to Differential Diagnosis     

P. F. Lord  B.V.Sc.  D.V.R.  P. F. Suter  Dr.med.vet.  K. F. Chan  M.D.  F.A.C.R.  M. Appleford  D.V.M.  C. R. Root  D.V.M.  M.S. 《Veterinary radiology & ultrasound》1972,13(1):4-17

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Canine brucellosis--a case report     

Nöckler K  Kutzer P  Reif S  Rosenberger N  Draeger A  Bahn P  Göllner C  Erlbeck C 《Berliner und Münchener tier?rztliche Wochenschrift》2003,116(9-10):368-372

Brucella (B.) canis was isolated from ejaculate of a 4-year old Korthals-Griffon male dog after occurrence of epididymitis and orchitis. Despite several trials of therapy with different antibiotics relapes occurred, with B. canis being isolated from ejaculate, blood and urine samples, respectively. Bacteriological examinations were added by serological testing over a period of about 1.5 years. During the study SAT serum titre steadily dropped from 1:200 to 1:50. By CFT, B. canis antibodies were detectable at the beginning with a titre of 1:320 and to the end of the study with titres between 1:80 and 1:160.  相似文献   

ULTRASONOGRAPHIC DETECTION OF ADRENAL GLAND TUMOR AND URETEROLITHIASIS IN A GUINEA PIG   总被引：1，自引：0，他引：1  

Lorrie  Gaschen  DVM  Cornelia  Ketz  Dr. med. vet.  Johann  Lang  Dr. med. vet  Urs  Weber  Dr. med. vet.  L. Bacciarini  Dr. med. vet.  Ingrid  Kohler  med. vet. 《Veterinary radiology & ultrasound》1998,39(1):43-46

A 5-year-old guinea pig was presented to the University of Berne Small Animal Radiology Department for an ultrasound examination of the abdomen to confirm a suspected diagnosis of Cushing's syndrome. The patient had bilateral alopecia, was apathic and obese. Ultrasonographically, a tumor of the left adrenal gland, obstruction of the left ureter by an ureterolith, as well as hydronephrosis of the left kidney were detected. During surgery to relieve the ureteral obstruction the adrenal gland tumor was removed. The guinea pig died post-operatively due to blood loss. The left adrenal gland tumor was found histopathologically to be an adenoma and the right adrenal gland also had multiple small adenomas, but grossly appeared normal. The ureterolith was analyzed and found by x-ray diffraction to consist of calcium carbonate.  相似文献   

Radiologic examination of the feline cardiovascular system.     

P F Lord  W J Zontine 《The Veterinary clinics of North America》1977,7(2):291-308

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Immunodeficiency associated with multiple concurrent infections in captive Pallas' cats (Otocolobus manul).     

Cornelia J Ketz-Riley  Jerry W Ritchey  John P Hoover  Calvin M Johnson  Michael T Barrie 《Journal of zoo and wildlife medicine》2003,34(3):239-245

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