What caused blood infection in newborn baby?

Infections due to bacteria in the bloodstream may occur during the birthing process when bacteria from the birth canal get onto the newborn’s skin, nose, mouth, and eyes. These bacteria can then get into the lungs and/or bloodstream to cause the infection.

Another way that the newborn may become infected is by bacteria infecting the placenta and getting into the infant’s bloodstream through the placenta and umbilical cord. The most common bacteria that cause neonatal infections are Group B streptococcus, Listeria monocytogenes, and Escherichia coli (E. coli). Occasionally, viruses such as herpes or cytomegalovirus may also cause infections in the newborn.