Neonatal pneumonia is mainly bacterial in origin; and common pathogens
include nonhemolytic Streptococcus, Staphylococcus aureus,
and Escherichia coli [1,2]. The infants are often afebrile and occasionally
are hypothermic. Shortly after birth tachypnea, retractions, and cyanosis
may be evident [1].
The radiographic findings of neonatal pneumonia vary. In most patients
patchy, asymmetric pulmonary opacities and hyperaeration are seen (Figure
1). Pleural effusion may be seen. In some patients, particularly in group
B streptococcal pneumonia, reticulogranular densities (Figure 2) as seen
in chest films of patients with surfactant deficiency disease may be found
[3]. When consolidation occurs, it usually is multilobar. Solitary lobar
consolidations (Figure 3) are relatively rare in neonates [2].
..
Figure 1. Note asymmetric coarse patchy infiltrates.
.
.
.Figure 2. Note diffuse fine granular
infiltrates.
.
Figure 3. Note consolidation in the left upper
lobe
from staphylococcal pneumonia.
.
..