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 May 20, 2023 (Week 20)
Reporting Area Giardiasis
Current weekPrevious 52 weeks Max †Cum YTD 2023 †Cum YTD 2022 †
U.S. Residents, excluding U.S. Territories 102 360 4,282 4,317
New England 5 37 260 390
Connecticut - 5 39 52
Maine 1 10 30 22
Massachusetts 3 22 160 273
New Hampshire 1 7 13 21
Rhode Island - 4 18 22
Vermont N NC N N
Middle Atlantic 24 85 951 939
New Jersey - 10 3 133
New York (excluding New York City) 10 41 298 255
New York City 13 33 460 389
Pennsylvania 1 28 190 162
East North Central 13 193 421 356
Illinois N NC N N
Indiana 2 7 29 56
Michigan 2 15 135 132
Ohio 6 174 139 50
Wisconsin 3 22 118 118
West North Central 4 24 219 232
Iowa 2 9 66 75
Kansas - 5 28 48
Minnesota - 0 - -
Missouri 1 9 74 62
Nebraska 1 5 27 29
North Dakota - 4 8 7
South Dakota - 4 16 11
South Atlantic 11 67 839 684
Delaware - 2 9 4
District of Columbia - 0 - -
Florida - 37 411 430
Georgia 1 18 160 79
Maryland 5 12 88 10
North Carolina N NC N N
South Carolina 1 8 57 42
Virginia 4 13 93 73
West Virginia - 10 21 46
East South Central 2 12 127 79
Alabama - 7 69 39
Kentucky 2 8 58 40
Mississippi N NC N N
Tennessee N NC N N
West South Central 3 14 102 112
Arkansas 3 7 33 39
Louisiana - 10 69 73
Oklahoma N NC N N
Texas N NC N N
Mountain 14 37 334 378
Arizona 2 6 44 31
Colorado 8 22 145 159
Idaho 2 7 35 31
Montana - 4 22 18
Nevada - 5 7 34
New Mexico 1 3 16 19
Utah 1 9 62 75
Wyoming - 3 3 11
Pacific 26 85 1,029 1,147
Alaska - 9 9 14
California 25 65 846 884
Hawaii - 3 15 14
Oregon 1 16 136 134
Washington - 14 23 101
U.S. Territories - 2 7 4
American Samoa - 0 - -
Commonwealth of Northern Mariana Islands - 0 - -
Guam - 0 - -
Puerto Rico - 2 7 3
U.S. Virgin Islands - 1 - 1
Non-U.S. Residents - 1 1 2
Total 102 360 4,290 4,323
  • 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/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).
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.