Respiratory disease Respiratory disease Respiratory disease is a medical term that encompasses pathological conditions affecting the organs and tissues that make gas exchange possible in higher organisms, and includes conditions of the upper respiratory tract, trachea, bronchi, bronchioles, alveoli, pleura and pleural cavity, and the nerves and muscles of breathing. Respiratory diseases range from mild and self-limiting, such as the common cold, to life-threatening entities like bacterial pneumonia, pulmonary embolism, acute asthma and lung cancer. The study of respiratory disease is known as pulmonology. A doctor who specializes in respiratory disease is known as a pulmonologist, a chest medicine specialist, a respiratory
Citrus stubborn disease orchard. In addition, it is important to closely monitor the weeds in young orchards to ensure that they are not susceptible to "Spiroplasma citri", and if susceptible ones appear, to remove them as soon as possible"." 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