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Primary, Secondary, and Early Latent Syphilis Cases per 100,000 Population by County, New Mexico, 2020

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Why Is This Important?

Syphilis was on the verge of elimination in 2000. Since 2012, the number of cases of primary and secondary syphilis, which is the most infectious, in New Mexico has steadily increased (following national trends), especially in the MSM (males who have sex with males) population. By 2017, 90% of all reported primary and secondary syphilis cases were male. Of those, 85% of cases were MSM. By 2018, the percentage of cases of MSM had decreased to 74% and by 2020, it decreased to 54%. In 2018, the percentage of women comprising syphilis cases was 15%, and by 2020 it increased to 30%, for all age groups. This has significant implications for the transmission from mother to infant. Congenital syphilis has increased from 1 case in 2017 to 26 cases in 2019 and then 43 cases in 2020. Syphilis can be treated with antibiotics; however, if left untreated for more than a year, it can eventually lead to paralysis, numbness, dementia, and death.

Primary, Secondary, and Early Latent Syphilis Cases per 100,000 Population by County, New Mexico, 2020


Syphilis cases reported in the state of New Mexico per 100,000 population. Primary and Secondary syphilis cases only are counted for graph by year comparing US and New Mexico case rates. All other graphs select primary, secondary, and early latent cases.

Data Sources

  • U.S. Data Source: Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention.
  • New Mexico Population Estimates: University of New Mexico, Geospatial and Population Studies (GPS) Program.
  • Patient Reporting Investigating Surveillance Manager, Infectious Disease Bureau, New Mexico Department of Health

How the Measure is Calculated

  • Numerator:

    Number of cases of syphilis reported to the state of New Mexico (and Centers for Disease Control) in New Mexico residents from all health care providers.
  • Denominator:

    Total Population

Data Issues

All population estimates apply to July 1 of the selected year. These estimates are considered the most accurate estimates for the state of New Mexico and should match those found on the University of New Mexico Geospatial and Population Studies website. Estimates include decimal fractions. Census tract population estimates were summed to produce County and Small Area population estimates. Population estimate totals may vary due to rounding. Population estimates for previous years are occasionally revised as new information becomes available. When publishing trend data, always be sure that your rates for earlier years match current rates on NM-IBIS that have been calculated with the most up-to-date population estimates.

Health Topic Pages Related to: Syphilis Rates

Indicator Data Last Updated On 05/05/2022, Published on 05/05/2022
Sexually-Transmitted Diseases Program, Infectious Disease Bureau, Public Health Division, New Mexico Department of Health, 1190 S. Saint Francis Drive Santa Fe, NM 87508-6100, contact Janine Waters, Program Manager, (505) 476-1778,; or for data inquiries contact Angie Bartok, Epidemiologist, (505) 827-2422,