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Shigella surveillance report no. 8, November 15, 1965
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November 15, 1965
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Description:THIRD QUARTER 1965
Fifty-two reporting centers are now participating in the Shigella Surveillance Program. These include 49 states as well as New York City, the District of Columbia, and the Virgin Islands (Figure 1). The most recent states that have initiated reporting are Massachusetts, Minnesota, and New York.
A total of 2248 human shigella isolations were reported from the 52 reporting centers during the third quarter of 1965. This represents an increase over the 1515 isolations reported during the second quarter of 1965 (49 reporting centers), which was a decline from the 1752 isolations reported during the first quarter of the year (46 reporting centers).
During July, August, and September, 69.5 per cent of shigella isolations were reported from children under 10 years of age, as compared with almost 73 per cent during the second quarter of 1965. A slight female predominance (51.1 per cent) was reported during the third quarter of this year. The opposite was true during the previous quarter. However, both quarters showed a predominance of males among the less than 5 year age groups.
The most frequently isolated serotypes during the third quarter continued to be Shigella sonnei and Shigella flexneri 2a. Regional differences continue to follow the same pattern, as reported below.
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