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Gross path challenge #11

Cerebellum with multiple foci of red discolouration varying in size from 2 to 8 millimetres

Above: Cerebellum from a feedlot steer (photo from Rick Last, DPIRD WA)

DESCRIPTION: Multiple randomly distributed varying sized (2 mm to 8 mm diameter) foci of red discoloration of the parenchyma of the cerebellum involving the grey and white matter (thromboembolism with haemorrhage). Thickening of the leptomeninges which are discolored red brown (meningitis with haemorrhage and thromboembolism).

Dx: Thromboembolic meningoencephalitis (TEME) – Histophilus somni.