<prompt> Thermoactinomyces sacchari is the causative agent of-Occupational asthmaBagassosisByssinosisFarmers lung  <response>: Occupational asthma is a lung disorder characterised by inhalation of substances in workplace which can cause airways of lungs to swell narrow. Farmers lung is hypersensitivity pneumonitis due to inhalation of dust of mouldy hay. Byssinosis is also known as brown lung disease due to inhalation of cotton paicles. Ref Harrison20th edition pg 1177 