Rickettsial infection occurs, causing focal or disseminated vasculitis (4) and perivasculitis
with significant vascular leakage and end-organ injury to lung, heart, liver, spleen and central nervous system, thus explaining the various unexpected clinical manifestations.
The exact cause of tractional retinal detachment remains uncertain but perivasculitis
may be possible explanation.
Thus far, no evidence indicates that the animals testing positive for the enteric CoV showed clinical disease that pointed to pyogranulomatous inflammation, necrosis with or without perivasculitis
, and vasculitis in abdominal and visceral organs associated with the systemic variant.
Due to persistent microhematuria, cystoscopy was performed and revealed very small papillary lesions in the bladder and biopsy showed focal vasculitis and perivasculitis
of a small artery of the lamina with no evidence of malignancy (Figure 1).
Eales' disease is an idiopathic disease with retinal perivasculitis
predominantly affecting the peripheral retina during the inflammatory stage followed by sclerosis of the retinal veins and retinal ischaemia and finally, retinal or optic disk neovascularization, recurrent haemorrhages, with or without retinal detachment (1).
We particularly noted lesions in the central system of moose that were characterized by nonpurulent meningo-encephalitis, edema, perivasculitis in extracellular spaces, and focal ischaemic necrosis because of thrombosis of small vessels.
Keywords: biosphere, encephalitis, extracellular edema, herbicides, insecticides, moose, perivasculitis, pollution, tolerance
In the areas of the thin fasciculi (Goll), the wedge-shaped fasciculi (Burdah), and the main ventral fasciculi, there was less perivasculitis but some small glial nodules, and demyelinated nerve fibers; mononuclear cells were present in the spinal canal.
Various types of vasculitis such as endovasculitis, panvasculitis, thrombovasculitis, and perivasculitis
Eschars of ATBF cases were histologically dominated by vascular injury and perivasculitis
, which were detected in all skin biopsy specimens examined.
Although splenic lesions of Churg-Strauss syndrome have been described and consist of extravascular granulomas, eosinophilic abscess, and perivasculitis
, similar findings in the lymph nodes have not been likewise documented.
Histologic findings in the juvenile alligators were multiorgan necrosis, heterophilic granulomas, and heterophilic perivasculitis
and were most indicative of septicemia or bacteremia.