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Bilateral cataract development in Holstein heifer calves.

Samantha C Clifford¹

¹Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1.

The Canadian Veterinary Journal = La Revue Veterinaire Canadienne

|February 3, 2023

Summary

This summary is machine-generated.

Bilateral cataracts were observed in seven Holstein heifer calves over five months. Extensive testing ruled out common infectious and nutritional causes, leaving the inciting factor for these acquired cataracts unknown.

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Area of Science:

Veterinary Ophthalmology
Ruminant Health
Pathogen Research

Background:

Bilateral cataracts present a significant health concern in young cattle.
Acquired cataracts in Holstein heifers are not well-documented, necessitating further investigation.

Purpose of the Study:

To investigate the cause of bilateral cataracts in a group of Holstein heifer calves.
To differentiate between congenital and acquired cases and identify potential etiological agents.

Main Methods:

Clinical examination of affected calves.
Diagnostic testing for infectious agents: bovine viral diarrhea virus (BVDV), Mycoplasma bovis, Leptospira sp.
Nutritional assessment of the herd's feed and water sources.

Main Results:

Seven Holstein heifer calves presented with bilateral cataracts over a 5-month period.
Five cases were classified as acquired, while two were congenital.
Testing ruled out BVDV, Mycoplasma bovis, Leptospira sp., and nutritional deficiencies as causative agents.

Conclusions:

The etiology of acquired bilateral cataracts in these Holstein heifers remains undetermined.
Further research is needed to identify potential novel causes or risk factors for acquired cataracts in cattle.