Weekly Disease Report

This page is a weekly report of reportable diseases in Hamilton County, TN. If you have any questions, please call our Epidemiology Department at (423) 209-8190.

A "reportable" disease is one that is required to be reported to the Health Department. Generally, these are diseases that are infectious from person-to-person or from some agent in the environment to people (for example, mosquitoes or ticks). Tracking these diseases provides an early warning system for the population as a whole. An "outbreak" is a cluster of cases of a disease. Monitoring "reportable" diseases allows us to determine when an "outbreak" is occurring.

Influenza (the flu) is not a reportable disease, however, each flu season (October to May) we track flu-like symptoms that are reported to us by local healthcare providers. These reports are on a voluntary basis but give us some idea of the severity of a flu season in our local area. These numbers will not appear on this report, but rather, will appear on a separate influenza report. For more information on influenza and the importance of getting the flu vaccine, visit our Influenza page.

These abbreviations apply to the table below:
MMWR = Morbidity and Mortality Weekly Report
WK = Week (calendar week number begin January 1)
YTD = Year-to-Date
- % change = means fewer than this time last year

Reportable Diseases

Hamilton County Selected Reportable Diseases, Year-to-Date (MMWR 28), Reporting Period: 12/30/18 - 7/13/18 Hamilton County 2018 YTD* Hamilton County 2019 YTD* Percent Change State of TN 2019 YTD* 
Botulism, infant 0 0 0% 2
Campylobacteriosis 14 15 7% 438
Chikungunya Virus 0 0 0% 0
Chlamydia 1,110 1,279 15% 20,836
Cryptosporidiosis 3 2 -33% 87
Dengue Fever 0 0 0% 0
Ehrlichiosis/Anaplasmosis 3 4 33% 58
Enterobacteriaciae, Carbapenem-resistant (CRE) 6 8 33% 281
Gonorrhea 493 636 29% 7,843
Group A Streptococcus, invasive 10 14 40% 218
Group B Streptococcus, invasive 15 15 0% 296
Haemophilus influenzae, invasive 3 7 133% 120
Hansen disease (Leprosy) 0 0 0% 0
Hemolytic uremic syndrome 1 0 -100% 7
Hepatitis A, acute 8 173 2063% 1,281
Hepatitis B, acute 3 4 33% 169
Hepatitis C Virus Infection, chronic, or resolved 564 456 -19% 9,192
Hepatitis C, acute 0 29 Undefined 300
HIV 19 17 -11% 379
Latent Tuberculosis Infection 33 32 -3% 561
Legionellosis 5 4 -20% 86
Listeriosis 1 2 100% 10
Lyme disease 0 0 0% 25
Malaria 0 0 0% 6
Mumps 0 0 0% 16
Neisseria meningitidis, invasive 0 2 Undefined 5
Pertussis 3 4 33% 90
Salmonellosis 15 18 20% 468
STEC (Shiga toxin-producing Escherichia coli)  6 10 67% 75
Shigellosis 3 4 33% 75
Spotted Fever Rickettsiosis 7 1 -86% 154
Syphilis 36 48 33% 904
Streptococcus pneumoniae, invasive disease (IPD) 18 14 -22% 466
Tuberculosis 2 3 50% 56
VRE (Vancomycin-Resistant Enterococcus), invasive 4 7 75% 89
Vibriosis 0 0 0% 20
West Nile Virus, neuroinvasive disease 0 0 0% 0
West Nile Virus, non-neuroinvasive disease 0 0 0% 0
Yersiniosis 0 0 0% 0
Zika 0 0 0% 0
*Preliminary data subject to change - source: TN Dept of Health