| Popis: |
Enteroinvasive Escherichia coli and the four Shigella species, S. dysenteriae, S. flexneri, S. sonnei and S. boydii are the causative agents of bacillary dysentery (shigellosis) in higher primates. Shigella-induced infections are due to the ingestion of either contaminated water or, as is now becoming increasingly apparent, foods. The infective dose for humans is 101 to 104 bacterial cells, with an incubation period of 12–50 hours. The illness is characterized by cramps, nausea, diarrhea and bloody stools and usually lasts about 4 days. According to Smith,24 the primary reason for many outbreaks in the developed world is poor personal hygiene of food handlers who contaminate the food that they contact. |
