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: 1/1/17 - 9/09/17 Hamilton County 2016 YTD* Hamilton County 2017 YTD* Percent Change State of TN 2017 YTD*
Botulism, infant 0 0 0% 3
Campylobacteriosis 14 24 71% 597
Chikungunya Virus 0 0 0% 0
Chlamydia 1366 1300 -5% 23,000
Cryptosporidiosis 4 4 0% 108
Dengue Fever 0 0 0% 0
Ehrlichiosis/Anaplasmosis 3 4 33% 97
Enterobacteriaciae, Carbapenem-resistant (CRE) 9 5 -44% 481
Gonorrhea 482 618 28% 8,081
Group A Streptococcus, invasive 12 15 25% 267
Group B Streptococcus, invasive 15 33 120% 375
Haemophilus influenzae, invasive 3 3 0% 106
Hemolytic uremic syndrome 0 0 0% 8
Hepatitis A, acute 1 0 -100% 5
Hepatitis B Positive Pregnant Female 5 6 20% 86
Hepatitis B, acute 3 5 67% 254
Hepatitis C Virus Infection, chronic or resolved NA 567 NA 13,123
Hepatitis C, acute 5 2 -60% 158
HIV 33 28 -15% 485
LaCross virus neuroinvasive disease 0 0 0% 11
Latent Tuberculosis Infection NA 55 NA 549
Legionellosis 2 8 300% 138
Listeriosis 0 0 0% 6
Lyme disease 0 0 0% 27
Malaria 0 0 0% 6
Mumps 0 0 0% 44
Neisseria meningitidis, invasive 1 0 -100% 2
Pertussis 5 0 -100% 139
Salmonellosis 26 26 0% 634
STEC (Shiga toxin-producing Escherichia coli) 1 2 100% 145
Shigellosis 3 6 100% 193
Spotted Fever Rickettsiosis 11 15 36% 569
Syphilis 35 74 111% 822
Streptococcus pneumoniae, invasive disease (IPD) 29 26 -10% 586
Tuberculosis 8 3 -63% 86
VRE (Vancomycin-Resistant Enterococcus), invasive 1 10 900% 107
Vibriosis 0 1 Undefined 21
West Nile Virus, neuroinvasive disease 0 1 Undefined 11
West Nile Virus, non-neuroinvasive disease 0 1 Undefined 6
Yersiniosis 0 0 0% 14
Zika 3 0 -100% 0
*Preliminary data subject to change - source: TN Dept of Health