High incidence of polyarteritis nodosa in the brains of culled sows.

A total of 307 brains of purebred sows obtained from an abattoir were retrospectively examined. These sows were culled with reasons of reproductive failure, urogenital infections, or locomotor problems. The most common macroscopic lesions were cavitations or lacunae in the basal nuclei (9.

Influence of Age on the Electrocardiographic Waves in Taiwanese Lan-Yu Miniature Pigs.

The purpose of the study reported here was to determine baseline information of the electrocardiogram (ECG) and the influence of age on cardiac function in Taiwanese Lan-Yu (TLY) miniature pigs. Non-anesthetized TLY minipigs (from birth to 6 months of age) were placed on a webbed stanchion, simulating a standing position, for acquisition of an ECG, using six limb leads (I, II, III, aVR, aVL, and aVF), with each as a single-channel ECG recorder. The P and T waves obtained from leads I, III, and aVL were useful in determining the subtle cardiac changes during maturation of TLY minipigs.