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 37), Reporting Period: 12/30/18 - 9/14/19 Hamilton County 2018 YTD* Hamilton County 2019 YTD* Percent Change State of TN 2019 YTD* 
Botulism, infant 0 0 0% 2
Campylobacteriosis 18 21 17% 663
Chikungunya Virus 0 0 0% 0
Chlamydia 1,493 1,763 18% 28,436
Cryptosporidiosis 8 4 -50% 156
Dengue Fever 0 0 0% 4
Ehrlichiosis/Anaplasmosis 4 7 75% 113
Enterobacteriaciae, Carbapenem-resistant (CRE) 6 12 100% 372
Gonorrhea 675 809 20% 10,870
Group A Streptococcus, invasive 14 16 14% 267
Group B Streptococcus, invasive 19 24 26% 403
Haemophilus influenzae, invasive 4 7 75% 135
Hansen disease (Leprosy) 0 0 0% 0
Hemolytic uremic syndrome 2 0 -100% 9
Hepatitis A, acute 20 188 840% 1,739
Hepatitis B, acute 3 5 67% 232
Hepatitis C Virus Infection, chronic, or resolved 741 601 -19% 11,873
Hepatitis C, acute 1 31 3000% 417
HIV 17 26 53% 519
Latent Tuberculosis Infection 48 43 -10% 777
Legionellosis 5 4 -20% 119
Listeriosis 1 2 100% 116
Lyme disease 0 1 Undefined 36
Malaria 0 0 0% 12
Mumps 0 0 0% 15
Neisseria meningitidis, invasive 0 2 Undefined 6
Pertussis 4 5 25% 145
Salmonellosis 25 25 0% 774
STEC (Shiga toxin-producing Escherichia coli)  8 10 25% 287
Shigellosis 4 4 0% 122
Spotted Fever Rickettsiosis 12 3 -75% 265
Syphilis 47 61 30% 1,284
Streptococcus pneumoniae, invasive disease (IPD) 24 16 -33% 521
Tuberculosis 3 6 100% 78
VRE (Vancomycin-Resistant Enterococcus), invasive 5 7 40% 115
Vibriosis 0 0 0% 29
West Nile Virus, neuroinvasive disease 1 0 -100% 1
West Nile Virus, non-neuroinvasive disease 0 0 0% 1
Yersiniosis 0 0 0% 0
Zika 0 0 0% 0
*Preliminary data subject to change - source: TN Dept of Health