Between 1977 and 1982, the National Center of Salmonella of the Institute Pasteur of Tunis has isolated; received and/or identified 1715 Salmonella strains. In typhoid and paratyphoid fevers group Salmonella typhi represent the predominant species with a frequency of 99.6%. In the enteric group, Salmonella wien is the most frequent (50,26%). 11 serotypes appeared in 1982, although 5 serotypes have not been met since 1977.
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