Medical records of 45 English Springer Spaniels with idiopathic epilepsy were reviewed. Median age at the onset of seizures was 3 years; hpwever, 9 (20%) dogs were between 5 and 6 years old at the time of the onset of seizures. Twenty-one (47%) dogs had generalized seizures, and 24 (53%) had focal onset seizures. Results of segregation analysis were consistent with partially penetrant autosomal recessive or polygenic inheritance. Simulated linkage indicated that-there was a 58% chance of obtaining suggestive linkage with the available pedigrees.
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