Neurological Diseases of Younger Cattle Flashcards
What are three congenital neurological diseases of younger cattle?
BVD virus
Schmallenberg virus
Bluetongue virus
What is the main aquired neurological diseases of younger cattle?
Cerebral anoxia
What are the two main congenital abnormalities caused by BVD virus?
Internal hydrocephalus
Cerebellar hypoplasia
What are the clinical signs of internal hydrocephalus in cattle?
Neurological deficits
+/- abnormal skull shape
Born weak and die in a few days or are still born
What are the clinical signs of cerebellar hypoplasia?
Ataxia and a wide based stance
Intention tremor and hypermetria
Inability to stand
When does infection of schmallenberg virus into the dam cause congenital malformations?
During pregnancy
What is cerebral anoxia due to?
Prolonged birth/dystocia +/- assistance
What are the treatments for cerebral anoxia in cattle?
IV fluids with bicarbonate
Colostrum by stomach tube
Nursing
What is CCN caused by?
Thiamine deficiency
How do cattle become thiamine deficient?
Thiaminases produced by certain rumenal bacteria
Thiaminases in some plants and in mouldy/spoilt feed
Lack of uptake in SI following enteritis
What does thiamine deficiency lead to in the brain?
Cerebral oedema
Pressure necrosis due to oedema
Necrosis of cerebral cortex
What is the typical age for calves to present with CCN?
2-7 months old
What are the four most severe signs of CCN?
Collapse
Convulsions
Opisthotonus
Mortality
What is the key element to CCN at post mortem examination?
Fluorescence under UV light
Which organism causes middle ear disease in cattle and what age does it affect them?
Mycoplasma bovis
3-4 weeks old
