is a common community
and is characterized by patchy exudative consolidation of lung parenchyma
due to terminal bronchiolitis with consolidation of peribronchial alveoli.
Images (slide show) Dr Yale Rosen
Pulmonary Pathology Online
; 3) Pneumococci ;
; 5) Pseudomonas aeruginosa ;
6) Coliform bacteria .
Patients present with fever, cough and purulent sputum.
- Bronchopneumonia is common in hospitalized patients.
- Bronchopneumonia may occur as a
complication of some disease.
In children -
In adults -
paratyphoid fever etc.
- It is often seen in two extremes of life
(in infants & old age).
- Most bronchopneumonia cases are caused
by organisms aspirated from the mouth.
Some patients are unable to clear their
lungs due to medication, old age, physical weakness and pulmonary
Patients who are immobile develop retention of secretions; thus, most
commonly involves the lower lobes.
Cilia not functioning - hereditary
dyskinesis, squamous metaplasia, cigarette smoking, gas exposure.
Alcohol, tobacco and oxygen therapy
interfering with the ability of the alveolar macrophages to kill bacteria.
Bacteria grow within secretions collected in the chest.
cystic fibrosis or an obstructing malignant tumour.
fluid is a good culture media.
There is initial terminal bronchiolitis
with patchy consolidation of peribronchial lung tissue.
Bronchioles are plugged by the swollen
mucosa and their secretion. As a result air cannot enter the
The imprisoned air in the alveoli is
absorbed causing collapse of the alveoli.
Collapsed areas are surrounded by areas of
[Consolidated areas are surrounded, from
inside outwards, by areas of congestion, collapse and emphysema ].
Resolution of the exudate usually restores
normal lung structure.
Organization may occur and result in
fibrous scarring in some cases.
Aggressive disease may produce abscesses.
(Dr Yale Rosen)
(less often unilateral), gray-red, patchy consolidation with intervening
normal lung tissue.
Nodular, elevated, edematous to hemorrhagic-purulent areas.
is more extensive at the base of the lung and often fuses together
resembling lobar pneumonia (confluent
wall is infiltrated with polymorphs, blood vessels are congested and
bronchial lumen contains pus and
desquamated epithelium. (Bronchocentric lesion)
lung alveoli are consolidated with purulent exudates (polymorphs &
pneumonias are mostly
4. Parenchymal destruction
depends on the organism .
3. Lung abscess
5. Bacteraemia with
abscess in other organs