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 45), Reporting Period: 12/31/17 - 11/10/18 Hamilton County 2017 YTD* Hamilton County 2018 YTD* Percent Change State of TN 2018 YTD* 
Botulism, infant 0 0 0% 3
Campylobacteriosis 36 23 -36% 780
Chikungunya Virus 0 0 0% 0
Chlamydia 1,615 1,901 18% 32,170
Cryptosporidiosis 10 9 -10% 212
Dengue Fever 0 0 0% 2
Ehrlichiosis/Anaplasmosis 5 4 -20% 124
Enterobacteriaciae, Carbapenem-resistant (CRE) 6 6 0% 574
Gonorrhea 799 860 8% 12,127
Group A Streptococcus, invasive 20 15 -25% 304
Group B Streptococcus, invasive 37 25 -32% 495
Haemophilus influenzae, invasive 3 4 33% 125
Hansen disease (Leprosy) 0 0 0% 1
Hemolytic uremic syndrome 0 2 Undefined 19
Hepatitis A, acute 0 41 Undefined 432
Hepatitis B, acute 6 4 -33% 314
Hepatitis C Virus Infection, chronic, or resolved 803 895 11% 18,751
Hepatitis C, acute 2 1 -50% 130
HIV 32 21 -34% 551
Latent Tuberculosis Infection 73 63 -14% 976
Legionellosis 9 6 -33% 138
Listeriosis 0 1 Undefined 14
Lyme disease 0 0 0% 23
Malaria 1 0 -100% 12
Mumps 0 0 0% 10
Neisseria meningitidis, invasive 2 0 -100% 5
Pertussis 3 5 67% 96
Salmonellosis 36 39 8% 970
STEC (Shiga toxin-producing Escherichia coli)  3 8 167% 326
Shigellosis 12 6 -50% 181
Spotted Fever Rickettsiosis 21 13 -38% 517
Syphilis 85 61 -28% 1,245
Streptococcus pneumoniae, invasive disease (IPD) 29 27 -7% 708
Tuberculosis 5 3 -40% 122
VRE (Vancomycin-Resistant Enterococcus), invasive 10 6 -40% 142
Vibriosis 2 1 -50% 28
West Nile Virus, neuroinvasive disease 3 1 -67% 10
West Nile Virus, non-neuroinvasive disease 1 2 100% 3
Yersiniosis 0 0 0% 14
Zika 0 0 0% 0
*Preliminary data subject to change - source: TN Dept of Health