When the bacillus population becomes large enough, they cause symptoms like anorexia, fatigue, weight loss, chilly sensations, afternoon remittent fever and night sweats. Associated chest pain is also sometimes felt which is usually due to inflammation of the parietal pleura. A tuberculous lesion that perforates a venous wall can cause hemoptysis, which is the expectoration of bloody sputum through coughing. The hemoptysic cough is also highly characteristic of pulmonary tuberculosis. Classification of Various Forms of Reinfection with TB Tissue that has already been exposed to TB is considered allergic.
Allergic tissues react differently to a reinfection than to a primary infection.
Also, the right lung is reinfected more often than the left lung. There is only a limited amount tissue destruction. Healing generally occurs in the healthy person who has received only a limited number of bacillus. During this cell mediated immune response, the bacilli are overcome by macrophages and are surrounded by fibrous tissue, creating the scarring that is characteristic of this type. The caseous material becomes softened then liquified, resulting in the liquid having the ability to discharge into a bronchi.