Gonorrhea screening program in New York State

Area of Science:

• Microbiology
• Clinical Diagnostics
• Public Health

Background:

• Neisseria gonorrhoeae (gonococcus) is a significant cause of sexually transmitted infections.
• Large-scale screening of mailed specimens presents logistical challenges for accurate diagnosis.
• Timely processing is crucial for effective public health surveillance of gonorrhea.

Purpose of the Study:

• To develop and validate a reliable screening method for Neisseria gonorrhoeae from mailed specimens.
• To assess the impact of processing time on diagnostic yield.
• To optimize the isolation and confirmation protocol for N. gonorrhoeae.

Main Methods:

• Development of a swab-oxidase test for initial screening of 171,089 mailed specimens.
• Confirmation of presumptive N. gonorrhoeae cultures using sugar fermentation.
• Analysis of positivity rates in relation to specimen collection-to-examination lag time over a 2-year period.

Main Results:

• The swab-oxidase test proved reliable for initial screening.
• 95% of N. gonorrhoeae cultures were isolated and confirmed within 1-2 days post-growth.
• Positivity rates were directly correlated with shorter lag periods between specimen collection and examination.
• Incubation time of 3 days was required for 3-9% of positive specimens, regardless of season.

Conclusions:

• The swab-oxidase test is an effective tool for high-volume Neisseria gonorrhoeae screening.
• Minimizing the delay between specimen collection and laboratory examination is critical for maximizing gonorrhea detection.
• The developed protocol enhances the efficiency and accuracy of diagnosing gonococcal infections from mailed samples.