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Images Dated 11th August 1997

Choose from 15 pictures in our Images Dated 11th August 1997 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

TEM of a parainfluenza virus, cause of croup Featured 11 Aug 1997 Image

TEM of a parainfluenza virus, cause of croup

Parainfluenza virus. Transmission electron micrograph of a section through a human parainflu- enza virus (HPV). HPV causes croup (laryngotracheo bronchitis), pneumonia, and other diseases of the respiratory system. It is spread by personal cont- act and droplets in breath, and almost everybody has been infected with it by the age of six. The protein shell (capsid) of the virus is white. The outermost membrane, the lipoprotein envelope, is studded with projections (peplomers) which appear as a surface fringe. Within this is the protein shell (capsid, white) of the virus. This encloses the dark, coiled nucleoprotein (genetic material). Magnification: x51, 300 at 10x8 inch size