Périartérite noueuse juvénile à rechute et infection streptococcique

Tonnelier, Jean-Marie; Ansart, Séverine; Tilly-Gentric, A.; Pennec, Y.L.

doi:10.1016/s1169-8330(00)80026-5

Revue du Rhumatisme

2000

DOI: 10.1016/s1169-8330(00)80026-5

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Périartérite noueuse juvénile à rechute et infection streptococcique

Jean-Marie Tonnelier

Séverine Ansart

A. Tilly-Gentric

et al.

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2005

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“…There have been two reports of cerebral polyarteritis nodosa without other organ involvement in pigs [2,10]. Streptococcal infection is one of the etiological factors associated with hypersensitivity vasculitis and has been considered as a possible cause of polyarteritis nodosa [2,11,14,15]. Previous studies also reported that streptococcal meningitis was frequently encountered in Taiwanese pig farms [12].…”

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High Incidence of Polyarteritis Nodosa in the Brains of Culled Sows

Liu

Chiang

Chu

et al. 2005

The Journal of Veterinary Medical Science

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ABSTRACT. 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 (9.1%, 28/307) and coarse and thickened leptomeninges with marked vessels (3.9%, 12/307). The most frequent microscopic lesion was polyarteritis nodosa (21.2%, 65/307), which was found in all 40 brains with the above-mentioned gross lesions and in all 25 brains with microscopic cerebral infarcts or cavitations. The affected arteries of polyarteritis nodosa were distributed primarily in the cerebral leptomeninges, basal nuclei, and internal and external capsules. Histopathologically, a characteristic change of the affected arteries was transmural fibrinoid necrosis with severe infiltration of mixed inflammatory cells; narrowing or occlusion of the lumen. The inflammatory cells were chiefly composed of lymphocytes, macrophages, and plasma cells, with a few eosinophils and occasional multinucleated giant cells. Polyarteritis nodosa was found at a high percentage in the brains from culled sows. It may result in cerebral ischemia, infarcts, and hemorrhage, and possibly play a role in the necessity for culling due to locomotor problems. KEY WORDS: brain, culled sow, polyarteritis nodosa.J. Vet. Med. Sci. 67(1): 125-127, 2005 Assessing the reasons for the culling of sows in swine breeding herds is the first step to understanding and controlling the factors influencing sow losses. Common reasons for culling of sows include reproductive failure, urinary infections, locomotor problems, replacement as well as age [3,13]. Data on the role of brain lesions in the need for culling is limited. The objectives of this restrospective study were to examine brain lesions in culled sows and to investigate their role in the culling of these animals.Brains obtained from 307 culled sows of two purebred breeding herds were included in this retrospective study. The included sows all either weighed more than 150 kg or were more than 1 1/2 years old. The actual age and body weight were not determined individually. The majority of culling sows were reported a previous history of locomotor problems, urogenital infections, or reproductive failure. The clinical history of each individual animal was not provided. All animals had been routinely immunized against classical swine fever (hog cholera), pseudorabies, Japanese B encephalitis, and erysipelas. After electric stunning and bleeding, the brains were immediately removed and fixed in 10% neutral buffered formalin for at least one week.Macroscopic examination was performed on each brain. Tissue sections were collected from various regions for histological examination including the olfactory bulb, cerebrum, basal nuclei, geniculi, corpora quadrigemina, hippocampus, medulla oblongata, choroid plexus, and cerebellum. The brain tissues were embedded in paraffin, cut at 6 µm, and routinely stained with ...

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High Incidence of Polyarteritis Nodosa in the Brains of Culled Sows

Liu

Chiang

Chu

et al. 2005

The Journal of Veterinary Medical Science

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Périartérite noueuse juvénile à rechute et infection streptococcique

Cited by 1 publication

References 13 publications

High Incidence of Polyarteritis Nodosa in the Brains of Culled Sows

High Incidence of Polyarteritis Nodosa in the Brains of Culled Sows

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