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 9), Reporting Period: 12/29/19 - 2/29/20 Hamilton County 2019 YTD* Hamilton County 2020 YTD* Percent Change State of TN 2020 YTD* 
Botulism, infant 0 0 0% 1
Campylobacteriosis 3 5 67% 73
Chikungunya Virus 0 1 Undefined 1
Chlamydia 406 367 -10% 6,389
Cryptosporidiosis 0 1 Undefined 26
Dengue Fever 0 0 0% 1
Ehrlichiosis/Anaplasmosis 0 0 0% 1
Enterobacteriaciae, Carbapenem-resistant (CRE) 1 5 400% 128
Gonorrhea 211 153 -27% 2,558
Group A Streptococcus, invasive 3 5 67% 86
Group B Streptococcus, invasive 5 3 -40% 91
Haemophilus influenzae, invasive 3 1 -67% 38
Hansen disease (Leprosy) 0 0 0% 0
Hemolytic uremic syndrome 0 0 0% 1
Hepatitis A, acute 34 2 -94% 104
Hepatitis B, acute 1 0 -100% 44
Hepatitis C Virus Infection, chronic, or resolved 147 115 -22% 2,434
Hepatitis C, acute 1 3 200% 47
HIV 2 1 -50% 95
Latent Tuberculosis Infection 5 6 20% 131
Legionellosis 0 0 0% 19
Listeriosis 0 0 0% 0
Lyme disease 0 0 0% 3
Malaria 0 1 Undefined 2
Mumps 0 0 0% 1
Neisseria meningitidis, invasive 0 0 0% 3
Pertussis 0 5 Undefined 24
Salmonellosis 0 6 Undefined 58
STEC (Shiga toxin-producing Escherichia coli)  0 2 Undefined 25
Shigellosis 3 2 -33% 23
Spotted Fever Rickettsiosis 0 0 0% 5
Syphilis 11 5 -55% 149
Streptococcus pneumoniae, invasive disease (IPD) 5 13 160% 184
Tuberculosis 1 0 -100% 16
VRE (Vancomycin-Resistant Enterococcus), invasive 2 1 -50% 15
Vibriosis 0 0 0% 2
West Nile Virus, neuroinvasive disease 0 0 0% 0
West Nile Virus, non-neuroinvasive disease 0 0 0% 0
Yersiniosis 0 1 Undefined 8
Zika 0 0 0% 0
*Preliminary data subject to change - source: TN Dept of Health