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Incidence of spontaneous cataracts in laboratory rabbits
Bayer 1133.jpg Picture: © Bayer Animal Health
Spontaneous cataracts are commonly seen in rabbits in the daily practice. In this study, nearly 1000 laboratory rabbits were examined to document the occurrence and incidence of spontaneously occurring cataracts in older New Zealand White (NZW) and New Zealand White New Zealand Red (NZW NZR - F1) rabbits during prescreening examinations at Alcon Laboratories.

A total of 946 rabbits (670 NZW and 276 NZW NZR) ranging in age from 77 to 288 days were examined.

Of the NZW rabbits, 333 were males and 337 were females. Of the NZW NZR (F1) rabbits, 139 were males and 137 were females.

Thirty-eight NZW rabbits (23 males and 15 females) exhibited immature cataracts in one or both eyes, and three NZW NZR (F1) rabbits (one male and two females) exhibited cataracts in one or both eyes.

The overall incidence of cataracts was 4.3% of all rabbits. Males and females were equally affected, but a significant difference in the incidence of cataracts existed between the NZW and NZW NZR (F1) rabbits with 5.7% of the NZW rabbits affected and 1.1% of the NZW NZR (F1) rabbits affected.

Spontaneous juvenile cataracts occur in rabbits and may develop as incidental lesions during toxicologic studies. The incidence of cataracts noted in our studies is consistent with an autosomal recessive mode of inheritance, but further studies are needed to confirm the mode or modes of inheritance. Hybrid pigmented rabbits (F1 or NZW NZR) exhibited a significantly lower incidence of cataracts.


Source: Munger, Robert J., Langevin, Nicholas & Podval, J. (2002): Spontaneous cataracts in laboratory rabbits. In: Veterinary Ophthalmology 5 (3), 177-181.



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SMALL ANIMAL PRACTICE

Reference intervals for blood parameters in Shetland Sheepdogsmembers
Several breeds have physiological peculiarities that induce variations in reference intervals (RIs) compared with the general canine population. Shetland sheepdogs (SSs) are reported to be more predisposed to different diseases (eg, hyperlipidemia, gallbladder mucocele, and hypothyroidism). Consequently, a breed‐specific approach is more often required. Thus, the aim of this study was to determine whether the RIs of the general canine population could be applied to that of SSs, and to generate breed‐specific RIs, where appropriate.

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