Pathogens causing lower respiratory tract infections

"Delays have dangerous ends"Most of the bacteria, viruses, fungal, protozoan parasites and helminth larvae are responsible in causing lower respiratory tract infections. Pneumonia is often divided in to "Typical" pneumonia caused by pyogenic bacteria. "Atypical" pneumonia is caused by organisms such as Mycoplasma pneumonia, Chlamydia pneumonia and Legionella pneumonia.A typical pneumonia exhibit a non-lobar, patchy,ill-defined on chest radiography and failure to show a causative organism on Gram stain or culture of sputum as routinely performed.(1)Streptococcus pneumonia is the most common cause of death in aged. Haemophilus is especially in elders and immunocompromised. Staph. aureus in intravenous drug users. Human para influenza, mainly in infants and children.RSV in young children. Robert Koch identified Mycobacterium tuberculosis as the causal agent of TB (tuberculosis) At present TB is the global health problem.Bovine tuberculosis is caused by M. bovis in cows and catties (2) It is equally dangerous. M. bovis spreads to humans through contaminated milk.