Skip Navigation LinksSkip Navigation Links
Centers for Disease Control and Prevention
Safer Healthier People
Blue White
Blue White
bottom curve
CDC Home Search Health Topics A-Z spacer spacer
spacer
Blue curve MMWR spacer
spacer
spacer

The content on this page is being archived for historic and reference purposes only. The content, links, and pdfs are no longer maintained and might be outdated.

Shigellosis -- United States, 1982

In 1982, 13,523 Shigella isolations from humans were reported to CDC. This represents a 9.9% decrease from the 15,006 isolations reported in 1981. The number of isolations has continued to decline from the 15,334 reported during the peak year, 1978 (Figure 1).

Shigella serotypes were reported for 12,818 of the 13,523 isolates and were distributed by serotype as follows: S. sonnei--8,228 (64.2%), S. flexneri--4,165 (32.5%), S. boydii--294 (2.3%), and S. dysenteriae--131 (1.0%). S. flexneri 1a, 1b, 2a, 3a, and 6 comprised 27.3% of all S. flexneri subtyped. When compared with 1981, reported S. boydii isolations decreased by 42.4%; S. dysenteriae, by 35.8%; and S. sonnei, by 12.7%. The number of S. isolates and were distributed by serotype as follows: S. sonnei--8,228 (64.2%), S. flexneri--4,165 (32.5%), S. boydii--294 (2.3%), and S. dysenteriae--131 (1.0%). S. flexneri 1a, 1b, 2a, 3a, and 6 comprised 27.3% of all S. flexneri subtyped. When compared with 1981, reported S. boydii isolations decreased by 42.4%; S. dysenteriae, by 35.8%; and S. sonnei, by 12.7%. The number of S. flexneri isolations remained relatively constant.

The decreases were not confined to one state or region. From 1981 to 1982, S. sonnei decreased notably in Florida (166 to 92), Georgia (349 to 135), Hawaii (128 to 46), Indiana (102 to 35), Louisiana (357 to 147), Missouri (128 to 35), and Virginia (889 to 81); S. boydii, in Arizona (38 to 16) and Texas (82 to 45); and S. dysenteriae, in California (129 to 71).

In the reported age distribution of persons from whom isolates were obtained, the age-specific attack rate was highest for 2-year-old children, markedly lower for older children, and slightly lower for adults, except for a slight increase for 20- to 29-year-olds (Figure 2). In the 20- to 29-year age groups, a slightly higher isolation rate was reported for females than for males. The isolation rates by sex were similar for the remaining age groups. The median ages of persons from whom isolates were reported were S. boydii--13 years, S. dysenteriae--24, S. flexneri--11, and S. sonnei--7.

Since shigellosis is a more important problem for some population groups than for others, data were tabulated separately for patients residing in certain institutions (e.g., nursing homes, facilities for the mentally ill, and other resident-care centers) and on American Indian reservations. Thirty-one percent of the reports included data on patient residence at the time of onset of illness. Of those specified, 1.2% lived in institutions and 2.7% on Indian reservations. Sixty-nine percent of the reported isolates from residents of institutions were S. sonnei, and 30.8% were S. flexneri. Fifty-nine percent of the isolates from residents of Indian reservations were S. flexneri, and 40.9% were S. sonnei. S. sonnei accounted for 74.4% of the isolates with known residence; S. flexneri, for 22.9%; S. boydii, for 1.2%; and S. dysenteriae, for 0.5%. Reported by Statistical Svcs Activity and Enteric Diseases Br, Div of Bacterial Diseases, Center for Infectious Diseases, CDC.

Editorial Note

Editorial Note: This report is based on CDC's Shigella Surveillance Activity, a passive, laboratory-based system that receives reports from the 50 states and the District of Columbia. These reports do not distinguish between clincial or sub-clinical infections or between chronic or convalescent carriers.

Disclaimer   All MMWR HTML documents published before January 1993 are electronic conversions from ASCII text into HTML. This conversion may have resulted in character translation or format errors in the HTML version. Users should not rely on this HTML document, but are referred to the original MMWR paper copy for the official text, figures, and tables. An original paper copy of this issue can be obtained from the Superintendent of Documents, U.S. Government Printing Office (GPO), Washington, DC 20402-9371; telephone: (202) 512-1800. Contact GPO for current prices.

**Questions or messages regarding errors in formatting should be addressed to mmwrq@cdc.gov.

Page converted: 08/05/98

HOME  |  ABOUT MMWR  |  MMWR SEARCH  |  DOWNLOADS  |  RSSCONTACT
POLICY  |  DISCLAIMER  |  ACCESSIBILITY

Safer, Healthier People

Morbidity and Mortality Weekly Report
Centers for Disease Control and Prevention
1600 Clifton Rd, MailStop E-90, Atlanta, GA 30333, U.S.A

USA.GovDHHS

Department of Health
and Human Services

This page last reviewed 5/2/01