Byssinosis not brown. Brown lung can ultimately result in narrowing of the airways, lung scarring and death from infection or respiratory failure. Patient history should reveal exposure to cotton, flax, hemp, or jute dust. Diagnostic tests include a lung function test and a chest x ray or CT scan. Measurable change in lung function before and after working shifts is key to diagnosis. Patients suffering from byssinosis show a significant drop in FEV1 over the course of work shift. Chest radiographs show areas of opacity due to fibrosis of the pulmonary parenchyma. Affected workers should be offered alternative employment. Continued exposure
Citrus stubborn disease Citrus stubborn disease The Citrus stubborn disease is a plant disease affecting species in the genus "Citrus". "Spiroplasma citri", a Mollicute bacterium species, is the causative agent of the disease. It is present in the phloem of the affected plant and transmitted by several leafhoppers including "Circulifer tenellus" (beet leafhopper) and "Scaphytopius nitridus" in citrus-growing regions of California and Arizona and "Circulifer haematoceps" in the Mediterranean region. The host most notably affected is sweet orange but the bacterium can also infect weeds such as periwinkle ("Vinca rosea") and London rocket ("Sisymbrium irio"). Yellowed plants of Chinese cabbage and pak-choi ("Brassica