Chlamydia Incidence

This indicator reports incidence rate of chlamydia cases per 100,000 population. This indicator is relevant because it is a measure of poor health status and indicates the prevalence of unsafe sex practices.
Report Area Total Population Total Chlamydia Infections Chlamdia Infection Rate
(Per 100,000 Pop.)
Franklin County, PA 152,085 379 249.2
Pennsylvania 12,774,545 50,485 395.2
United States 316,128,839 1,441,789 456.08
Note: This indicator is compared with the state average. Green - Better than state average, Red - Worse than state average.
Data Source: US Department of Health & Human Services, Health Indicators Warehouse. Centers for Disease Control and Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention. 2014. Source geography: County

Chlamydia Incidence Rate (Per 100,000 Pop.) by Race / Ethnicity
Report Area Non-Hispanic White Non-Hispanic Black Asian / Pacific Islander American Indian / Alaska Native Hispanic or Latino
Pennsylvania 100.1 1,245 81.4 309.01 443
United States 187 1,152.6 115.8 689.1 376.2
Chlamydia Incidence Rate (Per 100,000 Pop.) by Year, 2005 through 2014
Report Area 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
Franklin County, PA 175.39 197.16 201.88 110.11 185.52 187.81 219.48 238.05 206.46 249.2
Pennsylvania 300.11 316.75 339.27 336.18 341.75 373.85 415.06 430.83 407.2 395.2
United States 330.3 345.4 367.7 398 405.7 422.8 453.4 453.4 443.5 456.1
Website Updated December 11 2017 Site Reviewed January 05 2018

Chlamydia Incidence

Data Background

The Health Indicator Warehouse is the official repository of the nation's health data, providing public access to the information resources of the Centers for Disease Control and Prevention (CDC), the Environmental Protection Agency (EPA), the Health Resources and Services Administration (HRSA), and others. When applicable, data can be obtained grouped by various information, including state, county, gender, race, ethnicity, and educational attainment.

The National Center for HIV/AIDS, Viral Hepatitis, Sexually Transmitted Disease (STD), and Tuberculosis (TB) Prevention (NCHHSTP) is the branch of the Centers for Disease Control and Prevention (CDC) responsible for public health surveillance, prevention research, and programs to prevent and control HIV and AIDS, other STDs, viral hepatitis, and TB. NCHHSTP developed a set of indicators to monitor the prevalence and track its progress toward ending these diseases in each state, and regularly reports its progress. The NCHHSTEP program includes data from new patient case reports from 56 areas (all 50 states, the District of Columbia, American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands).


Cases of a given STD refer to confirmed diagnoses during a given time period. For example, the 2010 data on gonorrhea infection would include persons with laboratory-confirmed infection diagnosed between January 1, 2010 and December 31, 2010, and reported to CDC through June 8, 2011. Rates per 100,000 population were calculated for each STD. The population denominators used to compute these rates for the 50 states and the District of Columbia were based on the National Center for Health Statistics (NCHS) bridged-race population counts for the 2000–2010. These estimates are a modification of the U.S. Census Bureau population estimates in which the 31 race categories used by the Census Bureau are bridged into the five race/ethnicity groups that have been historically used to report race data for STD cases. Each rate was calculated by dividing the number of cases for the calendar year by the population for that calendar year and then multiplying the number by 100,000.

For more information, visit the NCHHSTP Atlas and click on the “About these data and footnotes” link.


Race and Ethnicity
Race and ethnicity (Hispanic origin) are collected as two separate categories by state departments of health based on methods established by the U.S. Office of Management and Budget (OMB) in 1997. Data reported from the CDC National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention (NCHHSTP) is available by combined race and ethnicity, and is reported only for state and national data summaries. County level statistics by race and ethnicity are not provided for this indicator from the data source. Detailed race/ethnicity data may be available from a local source.

Courtesy: Community Commons, <>, November 2017