In This Issue—December 1, 2010

JAVMA News

Gifts of agricultural animals have helped people in India, Indonesia, Sri Lanka, and Thailand recover from the tsunami that struck six years ago. And the AVMA is calling on members to celebrate the quarter millennium of their profession.

See page 1224

What Is Your Diagnosis?

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See pages 1241, 1245

Diagnostic Imaging in Veterinary Dental Practice

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See page 1251

Pathology in Practice

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See page 1257

Managing urethral obstruction in male cats without urethral catheterization

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Treatment of urethral obstruction in male cats may involve considerable expense, and as a result, some affected cats may be euthanatized because of financial constraints of the owners. Results of a new study, however, suggest a potential alternative to euthanasia in male cats with urethral obstruction when financial constraints prevent more extensive treatment. In the study, 15 male cats with urethral obstruction were treated with a combination of pharmacologic manipulation (acepromazine, buprenorphine, and medetomidine), decompressive cystocentesis, and a low-stress environment. Treatment was successful in 11 of the 15 cats. None of the cats had severe metabolic or physiologic derangements prior to the initiation of treatment.

See page 1261

A commercially available relaxin test for detection of pregnancy in cats

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Results of a cross-sectional study suggest that a commercially available relaxin test kit designed for use in dogs can also be used to reliably detect pregnancy in cats. The study included 162 female cats, consisting of 24 queens from a breeding colony; 128 stray, feral queens undergoing ovariohysterectomy; and 10 ovariohysterectomized cats. Pregnancy was detected by use of the relaxin test kit as early as gestational day 20; sensitivity of the test was 100% on and after gestational day 29. False-positive results were detected in 3 queens, 2 of which had large ovarian cysts, resulting in a specificity of 95.9%.

See page 1267

Use of the measure of patient-centered communication to analyze euthanasia discussions in companion animal practice

In an effort to characterize veterinarian-client communication during discussions regarding euthanasia of a pet, clinic visits with 32 companion animal veterinarians were recorded. Two cases designed to stimulate discussion regarding euthanasia of a pet were presented by undisclosed standardized clients, and audiotapes were analyzed by use of the measure of patient-centered communication. For both cases, veterinarians scored highest on communication components related to finding common ground and lowest on components related to exploring the disease and the illness experience. Lack of exploration of client feelings, ideas, and expectations and the effect of illness on the animal's function resulted in low scores among veterinarians.

See page 1275

Leishmaniasis in a dog native to Colorado

A 1-year-old sexually intact male dog was examined because of dermatologic lesions, weight loss, and diarrhea of 2.5 month's duration. Dermatologic lesions consisted of alopecia, thickening, erythema, and follicular casting. A diagnosis of leishmaniasis was confirmed by means of ELISA detection of antibodies against Leishmania spp, a high serum indirect fluorescent antibody titer against Leishmania infantum, amplification of Leishmania DNA on PCR assay of a whole blood sample and a lymph node aspirate, and histologic identification of suspected Leishmania amastigotes in skin specimens. Although vertical disease transmission was suspected, findings also suggested that it is possible that L infantum is now endemic in Colorado, and that leishmaniasis should be considered in dogs with scaly dermatoses.

See page 1288

Producer attitudes and practices related to antimicrobial use in beef cattle in Tennessee

To evaluate knowledge, attitudes, and management practices involving antimicrobial use among Tennessee beef producers, a questionnaire was mailed to a population-based, stratified random sample of 3,000 beef producers across the state. Overall, a significantly higher proportion of producers with multiple operation types reported giving antimicrobials than did producers with cow-calf operations. In multivariable analyses, herd size > 50 cattle, participation in Beef Quality Assurance or master beef producer certification programs, quarantining of newly purchased animals, use of written instructions for treating disease, and observation of withdrawal times were associated with a higher likelihood of antimicrobial use.

See page 1292

Effect of ammonium chloride supplementation on urine pH and urinary fractional excretion of electrolytes in goats

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Currently recommended strategies for preventing urolithiasis in goats include dietary and management changes that will acidify the urine, including dietary ammonium chloride supplementation. In a clinical trial involving 15 yearling castrated male goats, it was found that administration of ammonium chloride at a dosage of 450 mg/kg/d (205 mg/lb/d) achieved and maintained urine pH < 6.5 for 24 hours. Goats fed orchard grass hay with ammonium chloride supplementation had significantly higher fractional excretion of calcium and chloride than did goats fed orchard grass hay without supplemental ammonium chloride. Further studies of ammonium chloride supplementation and urolithiasis in goats fed low-calcium diets are indicated.

See page 1299

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