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Sexually Transmitted Infections Treatment Guidelines, 2021


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Table 5 – STI Treatment Guidelines										Related Pages
					Interpretation of serologic test results* for hepatitis B virus infection
Table 5
Serologic marker
InterpretationHBsAg
Total anti-HBc
IgM anti-HBc
Anti-HBs–
–
–
–
Never infected+†
–
–
–
Early acute infection; transient (≤18 days) after vaccination+
+
+
–
Acute infection–
+
+
–
Acute resolving infection–
+
–
+
Recovered from past infection and immune+
+
–
–
Chronic infection–
+
–
–
Past infection; low-level chronic infection§; passive transfer to infant born to HBsAg-positive mother; false positive (no infection)–
–
–
+
Immune if concentration is >10 mIU/mL after vaccination, passive transfer after HBIG administrationSource:Adapted from Schillie S, Vellozzi C, Reingold A, et al. Prevention of hepatitis B virus infection in the United States: recommendations of the Advisory Committee on Immunization Practices. MMWR Recomm Rep 2018;67(No. RR-1).
Abbreviations: anti-HBc = antibody to hepatitis B core antigen; anti-HBs = antibody to hepatitis B surface antigen; HBIG = hepatitis B immune globulin; HBsAg = hepatitis B surface antigen; IgM = immunoglobulin M.
* – = negative test result; + = positive test result.
†To ensure that an HBsAg-positive test result is not false positive, samples with repeatedly reactive HBsAg results should be tested with a neutralizing confirmatory test cleared by the Food and Drug Administration.
§Persons positive for only anti-HBc are unlikely to be infectious, except under unusual circumstances involving direct percutaneous exposure to large quantities of blood (e.g., blood transfusion or organ transplantation) or mutant HBsAg-related infection.
							
					
						Page last reviewed:  July 22, 2021					Content source: 	Division of STD Prevention, National Center for HIV, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention homeSTI Treatment Guidelines, 2021
Provider Resourcesplus icon
Customizable Announcement
Screening Recommendations
Tables of Evidence
Table of Contents
Summary and Introduction
Methods
Clinical Prevention Guidanceplus icon
STI and HIV Infection Risk Assessment
Primary Prevention Methods
Partner Servicesplus icon
Expedited Partner Therapy (EPT)
Reporting and Confidentiality
Retesting After Treatment to Detect Repeat Infections
Detection of STIs in Special Populationsplus icon
Pregnant Women
Adolescents
Children
MSM
WSW and WSWM
Transgender and Gender Diverse Persons
Persons in Correctional Facilities
HIV Infection: Detection, Counseling, and Referral
Diseases Characterized by Genital, Anal, or Perianal Ulcersplus icon
Chancroid
Genital Herpes
Granuloma Inguinale (Donovanosis)
Lymphogranuloma Venereum (LGV)
Syphilisplus icon
Primary and Secondary Syphilis
Latent Syphilis
Tertiary Syphilis
Neurosyphilis, Ocular Syphilis, and Otosyphilis
Syphilis Among Persons with HIV Infection
Syphilis During Pregnancy
Congenital Syphilis
Managing Persons Who Have a History of Penicillin Allergy
Diseases Characterized by Urethritis and Cervicitis
Chlamydial Infections
Gonococcal Infectionsplus icon
Gonococcal Infections Among Adolescents and Adults
Gonococcal Infections Among Neonates
Gonococcal Infections Among Infants and Children
*Mycoplasma genitalium*
Vulvovaginal Itching, Burning, Irritation, Odor or Dischargeplus icon
Bacterial Vaginosis
Trichomoniasis
Vulvovaginal Candidiasis
Pelvic Inflammatory Disease (PID)
Epididymitis
Human Papillomavirus (HPV) Infectionplus icon
Anogenital Warts
HPV-Associated Cancers and Precancers
Viral Hepatitisplus icon
HAV
HBV
HCV
Proctitis, Proctocolitis, and Enteritis
Ectoparasitic Infections
Sexual Assault and Abuse and STIsplus icon
Adolescents and Adults
Sexual Assault or Abuse of Children
References
Terms and Abbreviations Used in This Report
Workgroup Members
Timeline of STI Treatment Guidelines


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