👉 Northern infection, also known as northern pneumonia, is a type of lower respiratory tract infection that primarily affects individuals with weakened immune systems, such as those with HIV/AIDS, cancer patients undergoing chemotherapy, or those on immunosuppressive therapy. It typically involves the lower respiratory tract, including the bronchi and alveoli, leading to inflammation and fluid accumulation. This condition often presents with symptoms like cough, fever, and shortness of breath, and can be more severe and harder to treat compared to upper respiratory infections. The pathogenesis involves the invasion of pathogens, such as bacteria (e.g., Streptococcus pneumoniae) or viruses (e.g., influenza viruses), into the lower airways, triggering an immune response that can cause significant tissue damage and impaired gas exchange.
