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 25), Reporting Period: 12/31/17 - 6/23/18 Hamilton County 2017 YTD* Hamilton County 2018 YTD* Percent Change State of TN 2018 YTD* 
Botulism, infant 0 0 0% 3
Campylobacteriosis 9 12 33% 85
Chikungunya Virus 0 0 0% 0
Chlamydia 864 989 14% 17,009
Cryptosporidiosis 2 3 50% 85
Dengue Fever 0 0 0% 1
Ehrlichiosis/Anaplasmosis 0 0 0% 22
Enterobacteriaciae, Carbapenem-resistant (CRE) 4 6 50% 288
Gonorrhea 388 450 16% 6,150
Group A Streptococcus, invasive 14 10 -29% 194
Group B Streptococcus, invasive 26 14 -46% 260
Haemophilus influenzae, invasive 3 2 -33% 76
Hansen disease (Leprosy) 0 0 0% 1
Hemolytic uremic syndrome 0 1 Undefined 10
Hepatitis A, acute 0 5 Undefined 47
Hepatitis B, acute 3 1 -67% 160
Hepatitis C Virus Infection, chronic, or resolved 405 498 23% 11,023
Hepatitis C, acute 1 0 -100% 78
HIV 19 19 0% 396
Latent Tuberculosis Infection 36 32 -11% 512
Legionellosis 6 3 -50% 58
Listeriosis 0 1 Undefined 6
Lyme disease 0 0 0% 10
Malaria 0 0 0% 2
Mumps 0 0 0% 9
Neisseria meningitidis, invasive 0 0 0% 3
Pertussis 0 2 Undefined 52
Salmonellosis 12 13 8% 303
STEC (Shiga toxin-producing Escherichia coli)  2 5 150% 137
Shigellosis 1 3 200% 75
Spotted Fever Rickettsiosis 2 2 0% 126
Syphilis 50 33 -34% 634
Streptococcus pneumoniae, invasive disease (IPD) 23 16 -30% 526
Tuberculosis 1 2 100% 76
VRE (Vancomycin-Resistant Enterococcus), invasive 9 4 -56% 82
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 0 0% 12
Zika 0 0 0% 0
*Preliminary data subject to change - source: TN Dept of Health