Necrotic Cerebellitis in a Neonatal Calf Caused by <i>Mortierella wolfii</i>

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  • <i>Mortierella wolfii</i>感染による新生子牛の壊死性小脳炎
  • Mortierella wolfii感染による新生子牛の壊死性小脳炎
  • Mortierella wolfii カンセン ニ ヨル シンセイ コウシ ノ エシセイ ショウノウエン

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Abstract

A Japanese black neonatal calf showed ataxia, opisthotonus, and a decreased level of consciousness. The calf died on the third day after birth. In the necropsy, multiple white nodules were observed in the liver and kidneys, and a red nodule was observed in the spleen. Almost all areas of the cerebellum showed hemorrhagic and malacic changes. Histologically, hemorrhagic necrotic inflammation with numerous lesional fungal hyphae was observed in the cerebellum. In the kidneys, liver and spleen, granulomatous lesions containing fungal hyphae were also found. This fungus was identified as Mortierella wolfii based on a morphological and molecular biological analysis of a DNA sample obtained from the paraffin-embedded tissue of the cerebellar lesion. The present case was diagnosed as M. wolfii infection in a neonatal calf.

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