Bordetella pertussis. Coloured Transmission Elec- tron Micrograph (TEM) of whooping cough bacteria,Bordetella pertussis. These Gram-negative bacilli have been cut through,showing an outer cell wall and internal DNA genetic material (yellow). They cause whooping cough,known as pertussis,mainly in infants. This infectious disease of the res- piratory tract produces fits of coughing that end in loud inspiratory whoops. Potentially fatal in newborn and premature babies,these bacteria are spread in coughed droplets. Antibiotic drugs have a limited effect and the disease must run its course; a pertussis vaccination is effective. Magnification: x9,000 at 6x4. 5cm size | |
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