[Bartonella neuroretinitis : An atypical manifestation of cat scratch disease].

Cat scratch disease (CSD) typically manifests as a febrile lymphadenopathy and is caused by a Bartonella henselae infection after contact with cats. This article describes the case of an atypical presentation of CSD in a 52-year-old patient with acute unilateral loss of vision and headache without fever or lymphadenopathy. Funduscopic examination showed an optic disc swelling and macular star exsudates, pathognomonic for infectious neuroretinitis.

Pulmonary inflammation and crystalline silica in respirable coal mine dust: dose-response.

This study describes the quantitative relationships between early pulmonary responses and the estimated lung-burden or cumulative exposure of respirable-quartz or coal mine dust. Data from a previous bronchoalveolar lavage (BAL) study in coal miners (n = 20) and nonminers (n = 16) were used including cell counts of alveolar macrophages (AMs) and polymorphonuclear leukocytes (PMNs), and the antioxidant superoxide dismutase (SOD) levels. Miners' individual working lifetime particulate exposures were estimated from work histories and mine air sampling data, and quartz lung-burdens were estimated using a lung dosimetry model.

Suspected hypersensitivity pneumonitis after exposure to a biologic forage inoculant.

A 44-year-old farmer had respiratory symptoms and bibasilar pulmonary infiltrates after three exposures to a new biologic forage inoculant. Open lung biopsy revealed chronic interstitial pneumonitis and bronchiolitis obliterans with organizing pneumonia. The patient responded to oral corticosteroids but acutely worsened after an inadvertent reexposure to the forage inoculant.