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Sexually Transmitted Infections (STIs): Boston, 2012 In Boston, rates for both Chlamydia and gonorrhea increased from 2011 to 2012, while syphilis rates decreased slightly. Of the three, Chlamydia has increased the most since 2008, consistently rising every year. While disease rates are related to incidence of disease, they are also influenced by testing and reporting practices. STI Rates, 2008-2012 Rate Per 100,000 900 690 704 752 778 781 Syphilis 600 Chlamydia Gonorrhea 300 0 119 107 127 110 133 34 33 38 41 39 2008 2009 2010 2011 2012 Data source: Massachusetts Department of Public Health Note: STI surveillance data were collected by MDPH and cannot be validated by BPHC A larger percentage of Chlamydia cases are among females ages 1524 where as a larger percentage of syphilis cases are among males ages 40+. Although Chlamydia rates overall continue to rise, the age-specific rate among 15-24 year olds decreased by five percent from 2011 to 2012. In 2012, 63% of syphilis cases were reported among men who have sex with men (MSM). Percent of STI Cases by Age Group, 2012 15-19 Syphilis 20-24 25-29 Gonorrhea 30-39 40-49 Chlamydia 50+ 0% 50% 100% Percent STI Cases by Gender, 2012 Syphilis Gonorrhea rates increased 20% from 2011 to 2012. Gonorrhea Preliminary race/ethnicity data suggest that over half of Chlamydia and gonorrhea cases are among communities of color. Chlamydia Male Female 0% 50% 100% Data source: Massachusetts Department of Public Health Note: STI surveillance data were collected by MDPH and cannot be validated by BPHC Boston Public Health Commission · Infectious Disease Bureau 1010 Massachusetts Ave · Boston, MA 02118 Phone: (617) 534-5611 · Fax: (617) 534-5905 STI Rates by Boston Neighborhood, 2012 Mattapan, North Dorchester, Roxbury, and South Dorchester had the highest incidence rates of Chlamydia in 2012. North Dorchester, the South End, South Dorchester, and Roxbury had the highest incidence rates of gonorrhea in 2012. The highest syphilis rates (>60 cases per 100,000) occurred in the South End, South Dorchester, and East Boston. Neighborhoods with the highest STI rates mirror other disparities in health status. *Data Source for 2012 Sexually Transmitted Infections: Massachusetts Department of Public Health Note: STI Surveillance Data were collected by MDPH and cannot be validated by BPHC Boston Public Health Commission · Infectious Disease Bureau 1010 Massachusetts Ave · Boston, MA 02118 Phone: (617) 534-5611 · Fax: (617) 534-5905