Images Dated 4th March 1994

Researchers handling trays of frozen bacteria

Model released. Researchers removing trays containing samples of bacteria which were stored at low temperature in liquid nitrogen. The image was taken in one of the 52 laboratories found throughout the UK forming the Public Health Laboratory Service. The function of this institution is to detect the outbreaks of food poisoning, such as salmonellosis associated with eggs and poultry, the monitoring of infectious disease, imported diseases and environmental disorders

© GEOFF TOMPKINSON/SCIENCE PHOTO LIBRARY