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
Psittacine beak and feather disease in prevention. Every new bird that enters a pen with other birds should be quarantined first and be tested for BFDV. Birds which are known carriers should not be introduced into new pens, especially not if those contain young birds. Psittacine beak and feather disease Psittacine beak and feather disease (PBFD) is a viral disease affecting all Old World and New World parrots. The causative virus–"Beak and feather disease virus" (BFDV)—belongs to the taxonomic genus "Circovirus", family "Circoviridae". It attacks the feather follicles and the beak and claw matrices of the bird, causing progressive feather, claw and beak malformation and