Lenticular lesions in harbour seals (Phoca vitulina).

Lenticular lesions were found in 21 of 44 mainly younger harbour seals investigated during the epidemic caused by phocine distemper virus (PDV) in 1988/89. Malformations and cataracts varied in quality and degree and were histologically characterized by proliferative and/or degenerative lenticular alterations. Except for two animals, both eyes were affected symmetrically. For that reason, local exogenous causes are improbable. There was very little evidence for infectious agents isolated from the seals investigated (viruses, in particular PDV, bacteria, mycoplasma, parasites). Environmental, dietary and hereditary aspects were also considered, but no final conclusions could be made as to the involvement of these factors in the genesis of lens lesions in harbour seals.

[1]  R. L. Font,et al.  A light and electron microscopic study of anterior subcapsular cataracts. , 1974, American journal of ophthalmology.

[2]  W. Green,et al.  Pathologic findings in the anterior segment of the pinniped eye. , 1983, Journal of the American Veterinary Medical Association.

[3]  T Stephens,et al.  Galactose metabolism in relation to cataract formation in marsupials. , 1975, The Australian journal of experimental biology and medical science.

[4]  L. Kilham,et al.  Viral etiology of spontaneous ataxia of cats. , 1966, The American journal of pathology.

[5]  C. Martin,et al.  Cataract production in experimentally orphaned puppies fed a commercial replacement for bitch's milk , 1982 .

[6]  H. Edelhauser,et al.  Nutritional cataracts in timber wolves. , 1981, Journal of the American Veterinary Medical Association.

[7]  G. Naumann.  Pathologie des Auges , 1980 .

[8]  R. Squire,et al.  Clinical and pathologic features of a fatal viral disease of newborn pups. , 1965, American journal of veterinary research.

[9]  B. Liess,et al.  Herpesvirus in harbour seals (Phoca vitulina): isolation, partial characterization and distribution. , 1989, Zentralblatt fur Veterinarmedizin. Reihe B. Journal of veterinary medicine. Series B.