Dyspnea and cough with white foamy sputum may occur after intermediate manual labor. Lung auscultation shows local moist rales in a unilateral lung. The respiratory rate is often <24 breaths/min, and heart rate <100 beats/min. There is no arrhythmia. Chest X-rays shows the area of flocculent shadows occupies <1/4 of the lung. The shadows are confined to the right lower lobe and are spotty or patchy. CT scans reveal increased and enlarged lung markings. Routine blood tests are normal.