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: 12/31/17 - 9/15/18 Hamilton County 2017 YTD* Hamilton County 2018 YTD* Percent Change State of TN 2018 YTD*
Botulism, infant 0 0 0% 3
Campylobacteriosis 25 18 -28% 625
Chikungunya Virus 0 0 0% 0
Chlamydia 1,331 1,493 12% 25,852
Cryptosporidiosis 4 8 100% 169
Dengue Fever 0 0 0% 1
Ehrlichiosis/Anaplasmosis 4 4 0% 107
Enterobacteriaciae, Carbapenem-resistant (CRE) 5 6 20% 438
Gonorrhea 633 675 7% 9,599
Group A Streptococcus, invasive 16 14 -13% 270
Group B Streptococcus, invasive 33 19 -42% 400
Haemophilus influenzae, invasive 3 4 33% 102
Hansen disease (Leprosy) 0 0 0% 1
Hemolytic uremic syndrome 0 2 Undefined 16
Hepatitis A, acute 0 20 Undefined 229
Hepatitis B, acute 5 3 -40% 245
Hepatitis C Virus Infection, chronic, or resolved 573 741 29% 15,925
Hepatitis C, acute 2 1 -50% 114
HIV 28 17 -39% 454
Latent Tuberculosis Infection 61 48 -21% 813
Legionellosis 8 5 -38% 104
Listeriosis 0 1 Undefined 11
Lyme disease 0 0 0% 22
Malaria 1 0 -100% 8
Mumps 0 0 0% 10
Neisseria meningitidis, invasive 0 0 0% 4
Pertussis 0 4 Undefined 80
Salmonellosis 26 25 -4% 707
STEC (Shiga toxin-producing Escherichia coli) 2 8 300% 273
Shigellosis 8 4 -50% 138
Spotted Fever Rickettsiosis 15 12 -20% 451
Syphilis 75 47 -37% 995
Streptococcus pneumoniae, invasive disease (IPD) 26 24 -8% 639
Tuberculosis 3 3 0% 108
VRE (Vancomycin-Resistant Enterococcus), invasive 10 5 -50% 125
Vibriosis 1 0 -100% 24
West Nile Virus, neuroinvasive disease 1 1 0% 7
West Nile Virus, non-neuroinvasive disease 1 0 -100% 0
Yersiniosis 0 0 0% 14
Zika 0 0 0% 0
*Preliminary data subject to change - source: TN Dept of Health