Shigella surveillance report no. 6, May 17, 1965
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Shigella surveillance report no. 6, May 17, 1965

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Shigella surveillance report no. 6, May 17, 1965
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    FIRST QUARTER 1965 Forty-six reporting centers are now participating in the Shigella Surveillance Program. These include 43 states as well as New York City, the District of Columbia, and the Virgin Islands (Figure 1). We are happy to welcome Michigan, which started reporting April 1, to the Shigella Surveillance Program. A total of 1,752 shigella isolations were reported from 43 states and three other reporting centers during the first quarter of 1965. This represents a decline from the 2,101 isolations reported from the same reporting centers during the fourth quarter of 1964. Almost 70 per cent of shigella isolations were reported from children under 10 years of age. As in previous periods, a slightly larger percentage of isolations were reported from females than from males, being most marked in women over 20 years of age. More isolations from males than from females was again noted in children under 5 years of age. The most frequently isolated serotypes during the first quarter continues to be Shigella sonnei and J>. flexneri 2a. All S. boydii and S. dysenteriae are rare. In northern states sonnei was more frequently reported than all S. flexneri serotypes combined, while in southern states the S. flexneri group predominated.
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