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 18), Reporting Period: 12/30/18 - 5/4/19 Hamilton County 2018 YTD* Hamilton County 2019 YTD* Percent Change State of TN 2019 YTD* 
Botulism, infant 0 0 0% 2
Campylobacteriosis 8 9 13% 234
Chikungunya Virus 0 0 0% 0
Chlamydia 703 840 19% 12,924
Cryptosporidiosis 1 1 0% 53
Dengue Fever 0 0 0% 0
Ehrlichiosis/Anaplasmosis 0 0 0% 3
Enterobacteriaciae, Carbapenem-resistant (CRE) 5 1 -80% 172
Gonorrhea 343 435 27% 4,947
Group A Streptococcus, invasive 8 5 -38% 140
Group B Streptococcus, invasive 7 9 29% 184
Haemophilus influenzae, invasive 1 6 500% 84
Hansen disease (Leprosy) 0 0 0% 0
Hemolytic uremic syndrome 1 0 -100% 2
Hepatitis A, acute 0 92 Undefined 672
Hepatitis B, acute 1 2 100% 36
Hepatitis C Virus Infection, chronic, or resolved 340 301 -11% 6,100
Hepatitis C, acute 0 4 Undefined 69
HIV 11 8 -27% 233
Latent Tuberculosis Infection 19 17 -11% 358
Legionellosis 2 0 -100% 34
Listeriosis 1 0 -100% 2
Lyme disease 0 0 0% 7
Malaria 0 0 0% 4
Mumps 0 0 0% 10
Neisseria meningitidis, invasive 0 2 Undefined 3
Pertussis 2 3 50% 59
Salmonellosis 7 7 0% 180
STEC (Shiga toxin-producing Escherichia coli)  3 7 133% 120
Shigellosis 1 4 300% 36
Spotted Fever Rickettsiosis 0 0 0% 16
Syphilis 26 29 12% 503
Streptococcus pneumoniae, invasive disease (IPD) 13 9 -31% 335
Tuberculosis 2 2 0% 36
VRE (Vancomycin-Resistant Enterococcus), invasive 4 5 25% 57
Vibriosis 0 0 0% 9
West Nile Virus, neuroinvasive disease 0 0 0% 0
West Nile Virus, non-neuroinvasive disease 0 0 0% 0
Yersiniosis 0 0 0% 6
Zika 0 0 0% 0
*Preliminary data subject to change - source: TN Dept of Health