Pulmonary diseases are very common. The main causative agents of these diseases are Klebsiella pneumonia, Staphylococcus aureus, Pseudomonas aeruginosa, haemophilus influenza etc. Medication is the most important treatment of most diseases of pulmonology. The essential oils produced by many plants have been traditionally used for curing respiratory tract infections and are used as ethical medicines for cold. These oils have antimicrobial activity. This project aimed to the inhibitory action of certain volatile compounds against tha organisms causing pulmonary diseases. It is started with a noval etraction procedure of volatile compounds from the winter green oil and an Ayurvedic preparation of turmeric and ghee. Biological assay, turbidometric method and well diffusion method was done to check the antimicrobial activity of volatile compounds against selected pathogens. Biological assay and turbidometric method was based on the bacterial concentration(OD).
