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  • Author or Editor: Hugo P. Veit x
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Abstract

Objective—To evaluate a method for experimental induction of osteoarthritis in the hip joints of dogs.

Animals—12 mixed-breed dogs.

Procedure—A unilateral triple pelvic osteotomy was performed. In 6 dogs, the iliac osteotomy was repaired with 45° of internal rotation, reducing coverage of the femoral head by the acetabulum. In the other 6 dogs, the fragments were repaired in anatomic alignment. Radiography, force plate evaluations, and subjective lameness evaluations were performed before and after surgery. Dogs were euthanatized 7 months after surgery, and samples of cartilage and joint capsule were examined histologically.

Results—Subjective lameness scores, radiographic appearance of the hip joints, and Norberg angles were not significantly different between groups; however, force plate evaluations did reveal significant differences in vertical ground reaction forces. Femoral head coverage was significantly decreased with rotation of the acetabulum. Mild inflammatory changes were discernible in the joint capsule and articular cartilage of some dogs in both groups.

Conclusions and Clinical Relevance—Results suggest that 45° internal rotation of the acetabulum does not consistently induce biologically important osteoarthritic changes in the hip joints of dogs. (Am J Vet Res 2000;61:484–491)

Full access
in American Journal of Veterinary Research

Abstract

Objective

To determine and compare biochemical reference intervals for sunshine bass (hybrid striped bass) from 3 culture systems.

Design

Observational comparison study.

Animals

Clinically normal sunshine bass (reciprocal hybrid striped bass, female Morone chrysops × male M saxatilis) raised in high-density recirculating systems (80 g/L), low-density tanks (5 g/L) with biofilters, and cages (70 g/L) in a fresh water pond.

Procedure

Biochemical reference intervals were determined for fish from the different production systems following the National Committee for Clinical Laboratory Standards guidelines. Reference intervals from the 3 groups were compared.

Results

Reference intervals were significantly different between sunshine bass in the various culture systems. Though most of the differences in reference intervals were minor, fish in the high-density recirculating system had higher concentrations of total protein, albumin, globulin, creatinine, and phosphorus, and lower chloride values. There were no significant differences in glucose concentrations among the 3 groups of fish, and no differences in cortisol concentrations between fish in tanks and cages.

Conclusions

Separate reference intervals should be developed for hybrid striped bass in different culture systems.

Clinical Relevance

Determining biochemical reference intervals for hybrid striped bass provides a tool to assess the health status of these fish. (Am J Vet Res 1996; 57:624–627)

Free access
in American Journal of Veterinary Research

Abstract

Objective

To determine and compare hematologic reference intervals for hybrid striped bass from different culture systems and for 2 types of hybrid.

Design

Observational comparison study.

Animals

Clinically normal sunshine bass (reciprocal hybrid striped bass, female Morone chrysops × male M saxatilis) raised in high-density recirculating systems, sunshine bass raised in tanks with biofilters, and palmetto bass (original hybrid striped bass, female M saxatilis × male M chrysops) raised in tanks with biofilters.

Procedure

Hematologic reference intervals were determined for fish from the different production systems, following the National Committee for Clinical Laboratory Standards guidelines. Reference intervals from the 3 groups were compared.

Results

Reference intervals were significantly different between sunshine bass in the 2 culture systems and between sunshine and palmetto bass. Many of the differences were slight, but notable differences were observed. Sunshine bass in recirculating systems had higher total leukocyte, lymphocyte, neutrophil, and monocyte counts than did either hybrid in tanks. Palmetto bass had a greater number of neutrophils than monocytes, whereas sunshine bass had more monocytes than neutrophils. Additionally, palmetto bass had a lower PCV and hemoglobin value than did either group of sunshine bass.

Conclusions

Separate reference intervals should be developed for hybrid striped bass in different culture systems and for different types of hybrids.

Clinical Relevance

Determining reference intervals for hybrid striped bass provides a tool to assess the health status of these fish. (Am J Vet Res 1996; 57:618–623)

Free access
in American Journal of Veterinary Research