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University of California San Francisco
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University of California San Francisco
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Kathryn Anastos, MD
University of California San Francisco
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Kim Scarsi, PharmD
University of California San Francisco
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Kathleen A. Clanon, MD
University of California San Francisco
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Kristine M. Erlandson, MD, MS
University of California San Francisco
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Khalil G. Ghanem, MD, PhD
University of California San Francisco
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University of California San Francisco
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Karen P. Beckerman, MD
University of California San Francisco
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Kinna Thakarar, DO, MPH
University of California San Francisco
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Kimberly Gill, RN, MPH
University of California San Francisco
Professor of Medicine, Emeritus
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Kathleen Mulligan, PhD
University of California San Francisco
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Kimberly A. Workowski, MD
University of California San Francisco
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Kenneth E. Sherman, MD, PhD
University of California San Francisco
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Kenneth H. Mayer, MD
University of California San Francisco
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Kristen M. Marks, MD
University of California San Francisco
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Keith W. Crawford, PhD, RPh
University of California San Francisco
Professor of Medicine, Emeritus
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Kara W. Chew, MD, MS
University of California San Francisco
Professor of Medicine, Emeritus
San Francisco, CA
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CROI
Conference on Bacteriophages
RWHAP Clinical Conference
Podcasts
Slides
Question of the Week
Donate
Contact
CME Courses
HIV In-Person and Virtual Courses
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About Courses
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Current On-Demand Webinars
MATE Act CME
About Webinars
Dialogues
Upcoming IAS–USA Dialogues
On-Demand Dialogues
About Dialogues
Topics In Antiviral Medicine
Current Issues for CME
Previous Issues
TAM
Policies and Practices
Permission Request Form
HIV Drug Resistance
Drug Resistance Mutations Chart
Recent Webinars
Journal Articles
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Fellow Resources
IAS-USA Guidelines and Recommendations
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Practice Question of the Week
May 5, 2025: Preventing and Managing Syphilis
A 46-year-old man with HIV (plasma HIV RNA <20 copies/mL; CD4+ count, 1100 cells/µL) presented to care with low-grade fever, hair loss, and a rash involving his palms and soles. His treponemal enzyme immunoassay was reactive, as was his serum rapid plasma reagin (RPR) with a titer of 1:64. He was diagnosed with secondary syphilis and treated with 2.4 million units of long-acting benzathine penicillin G intramuscularly. At 3 months, his RPR titer was 1:32. Now, at 6 months, his RPR titer is still 1:32. He denies any symptoms or new exposures since his treatment 6 months ago. Which of the following is the most appropriate approach at 6 months following treatment for early syphilis?
A. No intervention is necessary at this time. Continue to follow the RPR titers
B. Order a cerebrospinal fluid examination (ie, lumbar puncture)
C. Treat with 1 intramuscular dose of 2.4 million units of long-acting benzathine penicillin G
D. Treat with 3 intramuscular doses of 2.4 million units of long-acting benzathine penicillin G, each 1 week apart
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