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2017 Study: Cataracts in the Norwegian Buhund—current prevalence and characteristics

3/5/2019

1 Comment

 
Vet Ophthalmol. 2017 Sep;20(5):460-467. doi: 10.1111/vop.12449. Epub 2017 Jan 3.
Cataracts in the Norwegian Buhund-current prevalence and characteristics.
Kristiansen E1, Revold T2, Lingaas F2, Narfström K3,4, Pedersen PB5, Kielland C2, Dahl S1, Ropstad EO2.

Author information
1 Hønefoss Dyrehospital, Hønefoss, Norway.
2 Department of Companion Animal Clinical Sciences, Norwegian University of Life Sciences, Oslo, Norway.
3 College of Veterinary Medicine, University of Missouri, Colombia, MO, USA.
4 RetVet KB, Vaxholm, Sweden.
5 Dyrenes Laege og Oegenklinik, Rødkaersbro, Denmark.

Abstract
OBJECTIVE:
To evaluate prevalence and characteristics of cataracts in the Norwegian Buhund breed 20 years after high reported prevalence of especially pulverulent nuclear cataracts (PNCs).

ANIMALS STUDIED:
Two hundred and fifty Norwegian Buhund dogs in Norway, Sweden, and Denmark (117 males and 133 females) with previously unknown eye health status were included. Forty-five dogs had multiple examinations (two to six times over a 6-year period). Median age was 4.4 years [0.2-15.2] at first examination and 5.3 years [0.2-15.2] at last examination.

PROCEDURES:
All dogs underwent regular screening for inherited eye diseases.

RESULTS:
At the last observation of each dog, 52.4% were affected by PNC, categorized as minimal (33 of 250 dogs; 13.2%), mild (31 dogs; 12.4%), moderate (38 dogs; 15.2%), or pronounced (29 dogs; 11.6%). Moderate or pronounced changes were only seen in older dogs, and progressive changes were identified in some of the re-examined dogs. Some dogs, free of lenticular changes at early examinations, were affected by PNC at re-examinations. The odds for finding PNC increased with dog's age up to approximately 8 years. Presumably inherited cataracts other than PNC were found in 53 dogs (21.2%) with cortical (17.6%) and posterior polar (6.4%) locations as the most common ones.

CONCLUSIONS:
The high prevalence of PNC in the breed reported 20 years ago persists. PNCs are not always visible in young dogs, and the rate of progression varies. The prevalence of other types of cataract is also high, but cataracts rarely cause loss of vision in this breed.


© 2017 American College of Veterinary Ophthalmologists.

KEYWORDS:
Norwegian Buhund; cataract; dog; eye; pulverulent nuclear cataract

PMID: 28044393 DOI: 10.1111/vop.12449
[Indexed for MEDLINE]

https://www.ncbi.nlm.nih.gov/pubmed/28044393
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11/5/2022 01:37:44 am

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