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 44), Reporting Period: 1/1/17 - 11/4/17 Hamilton County 2016 YTD* Hamilton County 2017 YTD* Percent Change State of TN 2017 YTD*
Botulism, infant 0 0 0% 4
Campylobacteriosis 18 35 94% 754
Chikungunya Virus 0 0 0% 0
Chlamydia 1693 1585 -6% 28,586
Cryptosporidiosis 10 7 -30% 156
Dengue Fever 0 0 0% 0
Ehrlichiosis/Anaplasmosis 4 5 25% 113
Enterobacteriaciae, Carbapenem-resistant (CRE) 10 6 -40% 604
Gonorrhea 604 779 29% 10,054
Group A Streptococcus, invasive 13 20 54% 315
Group B Streptococcus, invasive 20 36 80% 470
Haemophilus influenzae, invasive 6 3 -50% 133
Hansen disease (Leprosy) 0 0 0% 1
Hemolytic uremic syndrome 0 0 0% 8
Hepatitis A, acute 1 0 -100% 6
Hepatitis B Positive Pregnant Female 6 7 17% 109
Hepatitis B, acute 4 6 50% 321
Hepatitis C Virus Infection, chronic or resolved NA 797 NA 16,818
Hepatitis C, acute 6 2 -67% 178
HIV 35 32 -9% 565
Latent Tuberculosis Infection NA 72 NA 849
Legionellosis 4 9 125% 170
Listeriosis 0 0 0% 8
Lyme disease 0 0 0% 35
Malaria 1 1 0% 8
Mumps 0 0 0% 63
Neisseria meningitidis, invasive 1 1 0% 3
Pertussis 8 2 -75% 180
Salmonellosis 35 35 0% 825
STEC (Shiga toxin-producing Escherichia coli) 4 2 -50% 165
Shigellosis 3 11 267% 245
Spotted Fever Rickettsiosis 11 21 91% 721
Syphilis 45 88 96% 1125
Streptococcus pneumoniae, invasive disease (IPD) 33 29 -12% 656
Tuberculosis 10 5 -50% 105
VRE (Vancomycin-Resistant Enterococcus), invasive 2 10 400% 121
Vibriosis 0 2 Undefined 29
West Nile Virus, neuroinvasive disease 0 3 Undefined 20
West Nile Virus, non-neuroinvasive disease 0 1 Undefined 9
Yersiniosis 0 0 0% 15
Zika 4 0 -100% 0
*Preliminary data subject to change - source: TN Dept of Health