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

Weekly cases* of notifiable diseases, United States, U.S. Territories, and Non-U.S. Residents week ending December 16, 2023 (Week 50)
Reporting Area Giardiasis
Current weekPrevious 52 weeks Max †Cum YTD 2023 †Cum YTD 2022 †
U.S. Residents, excluding U.S. Territories 123 410 14,021 13,386
New England 8 33 872 1,008
Connecticut - 4 51 176
Maine 1 9 140 97
Massachusetts 6 23 544 597
New Hampshire - 7 77 82
Rhode Island 1 5 60 56
Vermont N NC N N
Middle Atlantic 38 100 3,283 2,695
New Jersey - 15 268 348
New York (excluding New York City) 15 48 1,161 843
New York City 17 45 1,317 928
Pennsylvania 6 20 537 576
East North Central 9 43 1,376 1,446
Illinois N NC N N
Indiana - 5 82 162
Michigan - 16 423 385
Ohio 7 21 431 484
Wisconsin 2 22 440 415
West North Central 8 31 744 1,095
Iowa - 9 185 164
Kansas - 8 127 116
Minnesota - 9 - 463
Missouri 3 12 249 181
Nebraska 5 5 80 83
North Dakota - 3 28 27
South Dakota - 7 75 61
South Atlantic 14 72 2,408 2,336
Delaware - 3 36 27
District of Columbia - 2 3 -
Florida 2 38 1,184 1,125
Georgia 4 18 454 532
Maryland 4 9 220 185
North Carolina N NC N N
South Carolina 2 8 150 127
Virginia 2 13 287 249
West Virginia - 6 74 91
East South Central 2 17 399 295
Alabama 1 13 206 158
Kentucky 1 10 193 137
Mississippi N NC N N
Tennessee N NC N N
West South Central 4 17 356 320
Arkansas 4 11 154 107
Louisiana - 9 202 213
Oklahoma N NC N N
Texas N NC N N
Mountain 8 60 1,402 1,153
Arizona 2 7 150 112
Colorado 3 33 633 495
Idaho 2 6 123 123
Montana - 7 90 65
Nevada - 4 56 66
New Mexico - 5 82 66
Utah 1 10 230 184
Wyoming - 4 38 42
Pacific 32 94 3,181 3,038
Alaska 3 6 60 97
California 25 72 2,491 2,326
Hawaii - 3 35 25
Oregon 3 16 383 320
Washington 1 14 212 270
U.S. Territories - 2 13 14
American Samoa - 0 - -
Commonwealth of Northern Mariana Islands - 0 - -
Guam - 0 - -
Puerto Rico - 2 13 11
U.S. Virgin Islands - 0 - 3
Non-U.S. Residents - 1 5 4
Total 123 411 14,039 13,404
  • 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.
  • * Case counts for reporting years 2022 and 2023 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/data-statistics/readers-guides/.
  • † 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).
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 in alphabetical order by condition. 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.