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SEROLOGICAL

TESTING

HEPATITIS B SURFACE ANTIGEN (HBsAg)


Single RDT* or laboratory-based immunoassay†

HBsAg + (reactive)


Report positive

Compatible with HBV infection
HBsAg – (non-reactive)


Report negative

No serological evidence of HBV infection
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ASSESSMENT FOR TREATMENT

ASSESSMENT OF STAGE OF LIVER DISEASE


(using clinical criteria* and/or non-invasive tests (NITs) for presence of cirrhosis, i.e. APRI score‡ >2 or based on TE§)

HBV DNA Nucleic Acid Test (NAT) (quantitative)


(to further guide who to treat and not treat, if no evidence of cirrhosis)

Presence of Cirrhosis
Yes
No
ALL AGES


>30 years (in particular)

AGE


≤30 years

ALT*†


Persistently abnormal

ALT*†


Intermittently abnormal

ALT*†


Persistently normal

ALT*†


Persistently normal

HBV DNA


>20,000 IU/mL

HBV DNA


2000–20,000 IU/mL

HBV DNA


<2000 IU/mL

HBV DNA


<2000 IU/mL

INITIATE ANTIVIRAL THERAPY* AND MONITOR


• Tenofovir or entecavir

• Entecavir in children aged 2–11 years

DEFER TREATMENT AND MONITOR
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MONITORING

DETECTION OF HCC in persons with cirrhosis or HCC family history (every 6 months)


• Ultrasound and serum AFP

TREATMENT RESPONSE AND/OR DISEASE PROGRESSION (every 12 months)


• Adherence at each visit, if on treatment

• ALT, HBV DNA and HBeAg

• Staging of liver disease (clinical criteria and NITs (e.g. APRI in adults or TE))

TOXICITY MONITORING IN PERSONS ON TREATMENT (baseline and every 12 months)


• Renal function and risk factors for renal dysfunction

Hep B

by Raj

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