Why Are Gonorrhea Case Rates Declining in the United States? A Research Agenda

Area of Science:

• Public Health
• Infectious Diseases
• Epidemiology

Background:

• Gonorrhea rates in the US had been rising for nearly a decade.
• A notable decline in gonorrhea infections was reported by the CDC in 2022 and 2023, especially among young adults.

Purpose of the Study:

• To explore potential drivers behind the recent decline in US gonorrhea rates.
• To evaluate the evidence for various factors, including the 4CMenB vaccine, doxycycline postexposure prophylaxis (doxy-PEP), asymptomatic screening, and sexual behavior changes.
• To identify data gaps and suggest future research directions.

Main Methods:

• Review and enumeration of potential contributing factors to the gonorrhea decline.
• Assessment of existing evidence supporting or refuting each potential driver.
• Identification of necessary data for clarifying the roles of different factors.

Main Results:

• The specific reasons for the observed decrease in gonorrhea incidence are currently unknown.
• Several potential drivers exist, but their individual impact and interplay require further investigation.
• The study highlights the need for more granular data from surveillance and research.

Conclusions:

• While the decline in gonorrhea is encouraging, understanding its causes is crucial for sustained control.
• Further research and enhanced data collection are essential to elucidate the roles of interventions like 4CMenB vaccine and doxy-PEP, as well as behavioral changes.
• Clarifying these factors will inform future public health strategies against gonorrhea.