Rate of Chlamydia Cases
by Sex and Age
Branch-Hillsdale-St. Joseph Health Department,
Michigan Residents, 2001-2024

Gender and Age 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Total141.1±18.7102.0±15.8108.7±16.3132.3±18.0164.9±20.1186.5±21.4168.2±20.3189.3±21.6176.5±21.0171.9±20.8197.3±22.3247.1±25.1208.7±23.1252.8±25.4295.4±27.4263.9±26.0282.9±26.9310.5±28.1271.8±26.3259.3±25.6284.1±26.8258.9±25.6282.2±26.7229.5±24.0
Under 15 Years*    *    *    *    *    18.6±14.9*    *    -    -    *    *    -    *    *    *    *    *    *    *    20.7±16.6-    *    -    
15-19 Years766.3±156.8463.2±122.1477.3±123.6658.6±145.71,065.4±185.1829.3±164.4756.9±157.6763.2±159.8958.3±180.7863.0±173.71,005.0±190.41,177.5±208.6974.3±192.01,126.6±207.51,182.7±211.21,140.9±207.31,438.9±234.21,225.9±217.11,147.7±211.3873.1±182.7971.0±192.31,058.0±199.41,112.6±204.0697.4±161.7
20-24 Years828.3±179.6754.1±171.2703.7±164.3919.3±188.0817.9±177.41,309.8±226.31,044.7±203.71,297.0±229.61,207.8±225.41,113.1±217.01,307.0±234.31,879.6±277.51,258.5±227.61,848.2±274.52,085.6±293.51,921.6±284.41,706.5±269.01,822.9±279.91,689.5±270.81,488.7±255.01,511.0±255.81,454.8±251.21,512.8±253.31,322.8±236.1
25-29 Years257.2±105.0182.3±89.2332.5±120.8240.4±102.7387.4±130.0340.8±119.8483.6±142.5640.9±164.4362.1±125.2458.8±141.8454.2±142.2525.0±154.7570.8±161.0666.1±173.9882.4±198.8821.0±190.2801.4±187.01,018.5±208.2988.2±204.3958.9±204.11,061.3±215.7861.2±196.7786.6±187.6744.0±180.2
30-44 Years62.0±26.529.8±18.524.4±16.940.5±22.025.6±17.788.7±33.590.9±34.383.4±33.471.9±31.595.2±36.6113.2±40.5114.0±40.8172.2±50.3138.2±45.1196.7±53.9121.4±42.7197.4±54.7358.4±73.5196.6±54.4321.1±68.6351.2±71.2298.8±65.8355.2±71.3294.0±64.3
45 Years & Older*    -    *    *    *    *    *    *    *    *    *    *    10.5±7.8*    *    *    11.7±8.1*    *    11.6±8.116.0±9.4*    23.2±11.423.1±11.3
Male32.2±12.624.3±10.928.0±11.738.2±13.738.1±13.658.2±16.854.4±16.363.7±17.754.2±16.471.2±18.878.9±20.083.1±20.576.7±19.797.9±22.3141.2±26.7125.8±25.3140.4±26.7163.8±28.8147.8±27.4144.4±26.8155.8±27.9138.8±26.4159.5±28.2131.7±25.5
Under 15 Years*    -    *    -    -    -    -    *    -    -    -    -    -    -    -    -    -    -    *    -    -    -    -    -    
15-19 Years159.7±98.9*    *    *    113.7±84.2130.7±90.5148.1±96.7168.1±104.1224.2±121.7247.3±129.4220.0±124.3187.0±115.8304.8±149.1252.2±136.9269.1±140.8326.9±155.1491.4±192.2355.1±163.8280.8±146.9371.8±166.9389.2±170.2503.2±192.9440.1±179.5306.3±149.9
20-24 Years155.5±107.7234.6±132.6174.9±114.1273.5±143.1214.8±126.8479.6±191.4281.9±147.5393.5±176.6323.1±163.2603.2±222.8534.1±208.8820.5±256.5338.2±165.4648.0±227.41,000.2±284.51,080.8±298.0829.0±262.5791.7±257.6786.7±256.0666.1±237.6927.8±279.3687.2±241.1991.0±285.0583.5±219.5
25-29 Years*    *    197.0±128.6152.6±113.0217.8±134.8125.2±100.1209.8±129.9276.3±150.0*    177.1±122.6272.8±154.1*    276.6±156.3437.5±196.3566.8±221.5394.1±181.7430.2±188.1725.3±242.9756.0±246.0567.8±217.6375.0±177.9363.5±177.8424.0±190.3454.9±194.1
30-44 Years*    *    -    *    *    50.2±34.851.2±35.439.4±31.561.5±40.2*    65.4±42.758.6±40.688.5±50.166.5±43.4126.8±60.245.6±36.4154.0±67.5260.5±87.4175.2±71.5243.0±82.8261.0±85.1219.6±78.5186.5±71.6219.0±77.0
45 Years & Older-    -    -    *    -    -    *    *    *    -    *    *    *    *    *    *    *    *    *    *    *    *    26.2±17.120.4±15.1
Female249.9±35.1180.0±29.8189.9±30.6227.4±33.5293.6±38.1317.3±39.6283.0±37.4316.0±39.7299.6±38.8273.0±37.1316.6±40.1411.4±45.8342.2±41.8409.6±45.8451.5±48.0403.9±45.5425.6±46.7457.7±48.4398.4±45.3377.7±44.0416.5±46.2381.9±44.3408.9±45.8329.8±40.9
Under 15 Years*    *    *    *    *    38.2±30.6*    *    -    -    *    *    -    *    *    *    *    *    *    *    42.5±34.0-    *    -    
15-19 Years1,442.6±311.9926.8±250.7948.2±251.71,291.6±294.42,098.4±373.11,596.4±329.01,423.9±311.81,412.3±313.21,751.4±351.01,529.3±332.61,846.0±369.82,252.0±414.31,705.1±365.92,068.5±403.32,160.5±408.82,008.6±393.72,432.5±433.62,145.4±409.92,052.8±402.31,400.6±330.61,587.3±351.71,637.7±353.71,825.6±373.71,109.3±291.6
20-24 Years1,575.0±358.51,319.7±326.31,270.6±316.81,610.5±356.81,463.2±340.32,195.2±419.31,867.1±391.02,266.2±434.82,122.3±426.81,635.2±377.32,139.4±430.22,988.1±500.32,229.2±432.13,133.4±511.03,241.9±522.82,820.8±493.52,613.9±475.72,931.4±508.52,690.9±493.92,379.2±463.12,138.3±437.12,275.4±450.02,078.5±427.42,105.7±425.8
25-29 Years463.1±202.5333.5±174.4481.6±210.6337.3±176.4573.6±228.8580.6±226.9784.7±262.71,012.7±297.7660.7±243.9761.5±262.9644.9±242.5957.5±299.1884.5±287.7910.4±292.01,222.8±336.91,298.7±347.41,223.7±337.11,342.1±346.11,248.8±334.11,387.2±354.61,813.3±406.71,398.8±360.61,189.0±334.41,067.7±313.8
30-44 Years108.5±50.148.9±33.950.3±34.864.6±40.039.9±31.9131.1±58.9128.0±59.1132.8±61.383.5±49.4162.7±69.5165.0±70.5173.8±72.6262.4±89.4215.9±81.4271.7±91.2202.3±79.2243.1±86.9454.0±118.6219.4±82.6405.5±111.1449.3±116.4383.4±107.1538.7±126.8375.5±104.9
45 Years & Older*    -    *    -    *    *    *    -    *    *    -    *    *    *    *    -    *    *    *    *    17.3±13.8*    20.2±14.925.7±16.8

Notes:

Rates are per 100,000 population for the specified age and sex group in the geographic area.

Asterisk (*) indicates that data do not meet standards of reliability or precision.

A dash ("–") indicates quantity zero.

All Ages category includes records with unknown age.

Total (Both Sexes) category includes records with unknown sex.

Source: Michigan Disease Surveillance System, MDHHS.

Last Updated: 01/15/2026