Notice: Improvements in data processing at CDC were applied to 2020 and 2021 data beginning with the tables published for week 47. Case count changes between tables published for week 46 and week 47 may be due to changes in data processing rules and not due to changes in disease levels.

Nationally Notifiable Infectious Diseases and Conditions, United States: Weekly Tables

TABLE 1ee. Weekly cases* of notifiable diseases, United States, U.S. Territories, and Non-U.S. Residents week ending December 18, 2021 (Week 50)
Reporting Area Salmonella Paratyphi infection § Salmonella Typhi infection ¶ Salmonellosis (excluding Salmonella Typhi infection and Salmonella Paratyphi infection) **
Current weekPrevious 52 weeks Max †Cum YTD 2021 †Cum YTD 2020 †Current weekPrevious 52 weeks Max †Cum YTD 2021 †Cum YTD 2020 †Current weekPrevious 52 weeks Max †Cum YTD 2021 †Cum YTD 2020 †
U.S. Residents, excluding U.S. Territories - 4 49 72 - 15 156 163 229 1,685 37,217 42,549
New England - 2 6 5 - 2 10 8 13 83 1,679 1,495
Connecticut - 2 3 2 - 2 6 3 - 19 350 339
Maine - 0 - - - 0 - - - 10 127 110
Massachusetts - 2 3 3 - 1 4 4 12 45 889 714
New Hampshire - 0 - - - 0 - 1 - 10 118 144
Rhode Island - 0 - - - 0 - - 1 8 130 111
Vermont - 0 - - - 0 - - - 6 65 77
Middle Atlantic - 1 11 9 - 3 26 44 37 132 3,663 4,395
New Jersey - 0 - - - 0 - 8 - 12 16 1,035
New York (excluding New York City) - 1 5 3 - 3 8 5 16 59 1,224 1,125
New York City - 1 4 5 - 2 11 20 15 52 1,109 905
Pennsylvania - 1 2 1 - 1 7 11 6 52 1,314 1,330
East North Central - 2 5 15 - 2 14 10 3 175 3,764 4,674
Illinois - 1 3 11 - 2 10 5 - 120 1,636 1,308
Indiana - 0 - - - 0 - 1 - 13 81 654
Michigan - 0 - 3 - 0 - 1 - 9 24 884
Ohio - 1 2 - - 2 4 3 - 43 1,165 1,143
Wisconsin - 0 - 1 - 0 - - 3 40 858 685
West North Central - 1 1 4 - 1 7 5 9 92 2,441 3,030
Iowa - 1 1 3 - 0 - - 2 32 631 591
Kansas - 0 - - - 1 2 - - 23 397 463
Minnesota - 0 - 1 - 1 - 2 - 10 - 690
Missouri - 0 - - - 1 4 3 5 35 770 767
Nebraska - 0 - - - 1 1 - 2 19 341 256
North Dakota - 0 - - - 0 - - - 7 96 88
South Dakota - 0 - - - 0 - - - 14 206 175
South Atlantic - 1 6 7 - 2 26 26 51 408 11,832 14,278
Delaware - 0 - 1 - 1 3 1 - 12 169 187
District of Columbia - 0 - - - 0 - 2 - 2 11 33
Florida - 1 2 1 - 1 4 2 21 273 5,361 6,236
Georgia - 0 - - - 0 - 1 8 78 1,921 2,014
Maryland - 1 2 3 - 1 11 6 - 40 693 679
North Carolina - 0 - - - 1 1 4 - 66 1,027 2,286
South Carolina - 0 - - - 1 1 2 11 76 1,489 1,668
Virginia - 1 2 2 - 2 6 8 11 50 1,085 926
West Virginia - 0 - - - 0 - - - 6 76 249
East South Central - 1 2 2 - 2 8 2 9 103 2,350 3,210
Alabama - 1 1 1 - 2 6 - 7 38 825 850
Kentucky - 0 - - - 1 1 1 - 25 416 636
Mississippi - 0 - - - 0 - - - 26 293 918
Tennessee - 1 1 1 - 1 1 1 2 36 816 806
West South Central - 1 2 5 - 2 10 11 62 363 5,153 4,944
Arkansas - 1 1 - - 1 1 1 12 26 502 417
Louisiana - 1 1 1 - 0 - - 9 51 802 1,272
Oklahoma - 0 - - - 1 1 2 6 77 768 753
Texas - 0 - 4 - 2 8 8 35 280 3,081 2,502
Mountain - 2 6 5 - 3 17 6 21 87 2,666 2,313
Arizona - 0 - 2 - 2 8 3 11 32 843 611
Colorado - 0 - 1 - 1 2 3 7 40 938 572
Idaho - 1 5 - - 0 - - - 6 73 201
Montana - 0 - - - 0 - - - 6 69 187
Nevada - 0 - 2 - 1 1 - - 4 52 51
New Mexico - 0 - - - 1 2 - 1 15 307 244
Utah - 1 1 - - 2 4 - 2 23 315 343
Wyoming - 0 - - - 0 - - - 8 69 104
Pacific - 2 10 20 - 11 38 51 24 742 3,669 4,210
Alaska - 1 1 2 - 0 - - - 2 16 56
California - 2 5 18 - 4 36 49 20 102 2,660 3,575
Hawaii - 1 3 - - 1 - 1 - 8 97 127
Oregon - 0 - - - 1 1 1 1 12 309 452
Washington - 2 1 - - 10 1 - 3 703 587 -
U.S. Territories - 3 7 1 - 2 3 - - 32 396 310
American Samoa - 0 - - - 0 - - - 0 - -
Commonwealth of Northern Mariana Islands - 2 4 - - 0 - - - 1 2 3
Guam - 3 3 1 - 2 3 - - 2 9 4
Puerto Rico - 0 - - - 0 - - - 32 382 299
U.S. Virgin Islands - 0 - - - 0 - - - 1 3 4
Non-U.S. Residents - 0 - - - 1 1 - - 2 2 2
Total - 7 56 73 - 15 160 163 229 1,685 37,615 42,861
  • U: Unavailable — The reporting jurisdiction was unable to send the data to CDC or CDC was unable to process the data.
  • -: No reported cases — The reporting jurisdiction did not submit any cases to CDC.
  • N: Not reportable — The disease or condition was not reportable by law, statute, or regulation in the reporting jurisdiction.
  • NN: Not nationally notifiable — This condition was not designated as being nationally notifiable.
  • NP: Nationally notifiable but not published.
  • NC: Not calculated — There is insufficient data available to support the calculation of this statistic.
  • Cum: Cumulative year-to-date counts.
  • Max: Maximum — Maximum case count during the previous 52 weeks.
  • * Case counts for reporting year 2021 are provisional and subject to change. Cases are assigned to the reporting jurisdiction submitting the case to NNDSS, if the case's country of usual residence is the U.S., a U.S. territory, unknown, or null (i.e. country not reported); otherwise, the case is assigned to the 'Non-U.S. Residents' category. Country of usual residence is currently not reported by all jurisdictions or for all conditions. For further information on interpretation of these data, see https://www.cdc.gov/nndss/docs/Readers-Guide-WONDER-Tables-20210421-508.pdf.
  • †Previous 52 week maximum and cumulative YTD are determined from periods of time when the condition was reportable in the jurisdiction (i.e., may be less than 52 weeks of data or incomplete YTD data).
  • § In previous years, cases were reported as Salmonellosis. Beginning in January 2019, cases began to be reported as Salmonella Paratyphi infection.
  • ¶ In previous years, cases were reported as typhoid fever. Beginning in January 2019, cases began to be reported as Salmonella Typhi infection.
  • ** In previous years, cases were reported as Salmonellosis (excluding paratyphoid fever and typhoid fever). Beginning in January 2019, cases began to be reported as Salmonellosis (excluding Salmonella Typhi infection and Salmonella Paratyphi infection).
Notes:
  • These are weekly cases of selected infectious national notifiable diseases, from the National Notifiable Diseases Surveillance System (NNDSS). NNDSS data reported by the 50 states, New York City, the District of Columbia, and the U.S. territories are collated and published weekly as numbered tables. Cases reported by state health departments to CDC for weekly publication are subject to ongoing revision of information and delayed reporting. Therefore, numbers listed in later weeks may reflect changes made to these counts as additional information becomes available. Case counts in the tables are presented as published each week. See also Guide to Interpreting Provisional and Finalized NNDSS Data.
  • Weekly tables since 1996 are available on CDC WONDER.
  • Weekly tables since 2014 are available on Data.CDC.gov.
  • Weekly tables for 1952–2017 published in the Morbidity and Mortality Weekly Reports (MMWR) are available at CDC Stacks MMWR, and weekly tables starting in 2018 are available at CDC Stacks NNDSS (once in CDC Stacks NNDSS select "Weekly Tables" in the "Genre" box at the left).
  • Notices, errata, and other notes are available in the Notice To Data Users page.
  • The list of national notifiable infectious diseases and conditions and their national surveillance case definitions are available at https://ndc.services.cdc.gov/. This list incorporates the Council of State and Territorial Epidemiologists (CSTE) position statements approved by CSTE for national surveillance.
Suggested Citation:
  • Centers for Disease Control and Prevention. National Notifiable Diseases Surveillance System, Weekly Tables of Infectious Disease Data. Atlanta, GA. CDC Division of Health Informatics and Surveillance. Available at: https://www.cdc.gov/nndss/data-statistics/index.html.
Acknowledgment:
  • CDC acknowledges the local, state, and territorial health departments that collected the data from a range of case ascertainment sources (e.g., health-care providers, hospitals, laboratories) and reported these data to CDC's National Notifiable Diseases Surveillance System.