Rift-Valley-Fieber und Rickettsianretinitis einschliesslich Fluoresceinangiographie

Three cases of Rift Valley fever retinitis and one case of Tick Bite fever retinitis are presented. The clinical features are indistinguishable, manifesting as localised areas of retinal ischaemia and soft exudate formation. Fluorescein angiography shows that there is primary involvement of the retinal circulation without involvement of the choroidal circulation. Vascular occlusion is a feature of the retinal pathology. These patients were treated with steroids and immunosuppressives as their maculae were threatened and they all regained normal to near normal vision except in one case in whom old macula scarring from previous episodes of the disease prevented visual improvement.