First report of acute, visceral, fatal toxoplasmosis in a naturally infected calf (Bos taurus).

Cattle are considered resistant to clinical toxoplasmosis and viable Toxoplasma gondii is rarely isolated from bovine tissues. Currently, there is no histologically confirmed case of clinical toxoplasmosis in cattle. Here, the first confirmed case of acute toxoplasmosis in cattle is reported.

Histologic and cytologic changes in normal equine joints after injection with 2.5% injectable polyacrylamide hydrogel reveal low-level macrophage-driven foreign body response.

Objective: The data presented in this paper are derived from an in vivo study performed to characterize the nature of the synovial integration process of a 2.5% synthetic cross-linked injectable polyacrylamide hydrogel (2.5 iPAAG) injected IA in horses.

Cutaneous papilloma associated with a novel papillomavirus sequence in a cat.

A 5-mm diameter mass developed on the nasal planum of a 4.5-y-old castrated male domestic shorthaired cat; the mass was raised ~2 mm above the surrounding skin. Histology revealed focal thickening of the epidermis with marked orthokeratosis.

Long-term recurrent, yet nonprogressive, pedal viral papillomas in a dog.

Viral papillomas that developed on the toe of a dog, were removed and recurred four times in two years. Despite the papillomas being 'persistent', they remained small and confined to the toe, and did not spread or progress to severe disease. Not all persistent papillomas will progress, even when these are treated using more conservative therapies.

Clove Oil Delays Rather Than Prevents Scur/Horn Growth in Dairy Cattle.

The objective of this study was to evaluate if administration of clove oil prevents scur/horn growth in dairy cattle long term. At approximately 4 days of age, calves had one of four treatments assigned to each horn bud: (1) clove oil administered subcutaneously under the horn bud (CLOV, = 132); (2) cautery disbudded and the horn bud removed (BUDOFF, = 126); (3) cautery disbudded and the horn bud tissue left intact (BUDON, = 129); (4) a liquid nitrogen filled probe applied to the horn bud area (CRYO, = 131). At approximately 16 months of age, all cattle were checked for scur or horn development.

Virulence of Rhodococcus equi isolated from cats and dogs.

Nine cat isolates and nine dog isolates of Rhodococcus equi from clinical material were investigated for the presence of the virulence-associated antigens (VapA and VapB) and virulence plasmids. Five of the cat isolates and one dog isolate were VapA positive and contained an 85-kb type I or an 87-kb type I plasmid. The remaining 12 isolates were avirulent R.