51.2 MB (3.2 MB compressed)
5220 x 3427 pixels
44.2 x 29.0 cm ⏐ 17.4 x 11.4 in (300dpi)
ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY
Chronic pneumonia of the lung. Light micrograph of a section of lung tissue diseased with chronic pneumonia. Here, alveolar (air) sacs of the lung are narrowed and engorged with blood (orange). The blood consists of macrophages & neutrophils, white blood cells occurring as an inflammatory response and which fight infection. Lung air capacity is reduced due to this chronic inflammatory exudate. Chronic pneumonia may be diagnosed by a cough that produces a yellow-green sputum. This exudate is usually in response to the presence of pneumo- cocci bacteria, commonly Steptococcus pneumoniae. Magnification: x25 at 35mm size.
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