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 52), Reporting Period: 12/31/17 - 12/29/18 Hamilton County 2017 YTD* Hamilton County 2018 YTD* Percent Change State of TN 2018 YTD* 
Botulism, infant 0 0 0% 3
Campylobacteriosis 38 27 -29% 887
Chikungunya Virus 0 0 0% 0
Chlamydia 1,871 2,222 19% 36,998
Cryptosporidiosis 13 9 -31% 238
Dengue Fever 0 1 Undefined 7
Ehrlichiosis/Anaplasmosis 5 4 -20% 127
Enterobacteriaciae, Carbapenem-resistant (CRE) 7 8 14% 691
Gonorrhea 901 1,009 12% 14,055
Group A Streptococcus, invasive 23 19 -17% 347
Group B Streptococcus, invasive 40 30 -25% 582
Haemophilus influenzae, invasive 5 7 40% 147
Hansen disease (Leprosy) 0 0 0% 1
Hemolytic uremic syndrome 0 2 Undefined 22
Hepatitis A, acute 0 72 Undefined 636
Hepatitis B, acute 7 4 -43% 365
Hepatitis C Virus Infection, chronic, or resolved 1,123 1,034 -8% 21,028
Hepatitis C, acute 3 1 -67% 152
HIV 34 28 -18% 643
Latent Tuberculosis Infection 87 71 -18% 1,116
Legionellosis 10 7 -30% 165
Listeriosis 0 1 Undefined 15
Lyme disease 0 0 0% 26
Malaria 1 0 -100% 12
Mumps 0 0 0% 10
Neisseria meningitidis, invasive 3 0 -100% 6
Pertussis 4 5 25% 110
Salmonellosis 40 44 10% 1,110
STEC (Shiga toxin-producing Escherichia coli)  3 9 200% 359
Shigellosis 14 7 -50% 213
Spotted Fever Rickettsiosis 22 13 -41% 532
Syphilis 98 81 -17% 1,463
Streptococcus pneumoniae, invasive disease (IPD) 35 35 0% 849
Tuberculosis 6 3 -50% 139
VRE (Vancomycin-Resistant Enterococcus), invasive 12 8 -33% 173
Vibriosis 2 2 0% 32
West Nile Virus, neuroinvasive disease 3 2 -33% 11
West Nile Virus, non-neuroinvasive disease 1 0 -100% 1
Yersiniosis 0 0 0% 16
Zika 0 0 0% 0
*Preliminary data subject to change - source: TN Dept of Health