Byssinosis Byssinosis Byssinosis, also called "brown lung disease" or "Monday fever", is an occupational lung disease caused by exposure to cotton dust in inadequately ventilated working environments. Byssinosis commonly occurs in workers who are employed in yarn and fabric manufacture industries. It is now thought that the cotton dust directly causes the disease and some believe that the causative agents are endotoxins that come from the cell walls of gram-negative bacteria that grow on the cotton. Although bacterial endotoxin is a likely cause, the absence of similar symptoms in workers in other industries exposed to endotoxins makes this uncertain. Of the
Citrus leprosis disease In fruits, dark and depressed lesions are found in large numbers and affecting only the external part. Commercial losses result from undesirable appearance and fruits falling. Some differences in symptoms produced by CiLV-C and CiLV-N have been reported; in leaves and fruits, lesions caused by the nuclear type are smaller and more numerous than those caused by the cytoplasmic type. Lesions caused by CiLV-C shows additional halos, making them look larger. This disease is considered an important problem in citriculture in countries where it has been established, and is considered the major viral disease in citrus in Brazil. Damage by