Patient's question:
At home, there's a newborn baby who got pneumonia less than ten days after birth. I want to know how could the child have gotten pneumonia without having been exposed to the outside world?Doctor's answer:
Newborns have shorter tracheas with relatively dry lumens. Their cilia are poor at clearing bacteria and dust, making it easy for bacteria to enter the lungs. Newborn lung tissue is not well-differentiated, with fewer alveoli and relatively rich pulmonary blood vessels, making it prone to congestion and inflammation. Newborns have weakened immune function, making them easily susceptible to pathogens. If the mother suffers from an infectious disease before delivery, the pathogens can cross the placenta to infect the fetus, with symptoms typically appearing within 24 hours after birth. Pneumonia is often caused by diseases such as colds and tracheitis, which are not treated promptly and then spread to the lungs.