1. Hepatitis A
a. Reactive hepatitis A IgM antibody AND reactive hepatitis A total antibody is indicative of acute infection.
b. Reactive hepatitis A total antibody AND non-reactive hepatitis A IgM antibody is indicative of past, resolved infection.
c. A non-reactive hepatitis A total antibody result indicates probable susceptibility to hepatitis A infection.
d. A reactive hepatitis A total antibody result indicates probable immunity to infection/reinfection; however, this assay does not have FDA clearance for confirmation of immunity, whether by natural infection or vaccination.
2. Hepatitis B
a. Hepatitis B surface antibody can be measured to determine if vaccination is needed or, following a vaccination regimen, to determine if protective immunity has been achieved.
Diagnostic interpretations are as follows:
|
HBsAg |
NON-REAC |
No serologic evidence of infection with hepatitis B was detected. |
HBsAb |
NON-REAC |
HBcAb (Total) |
NON-REAC |
HBsAg |
NON-REAC |
This serologic pattern is suggestive of the recovery phase of acute hepatitis B: in such cases, repeat testing once with HEPATITIS B SURFACE ANTIBODY to document seroconversion. This pattern may also rarely represent chronic hepatitis B with undetectable level of hepatitis B surface antigen: consultation with a specialist is suggested if clinical conditions warrant. |
HBsAb |
NON-REAC |
HBcAb (Total) |
REACTIVE |
HBsAg |
NON-REAC |
This serologic pattern is consistent with vaccine-induced hepatitis B surface antibody. |
HBsAb |
REACTIVE |
HBcAb (Total) |
NON-REAC |
HBsAg |
NON-REAC |
This serologic pattern is found in resolved acute hepatitis B. |
HBsAb |
REACTIVE |
HBcAb (Total) |
REACTIVE |
HBsAg |
REACTIVE |
This serologic pattern is found in late incubation period or early acute hepatitis B. |
HBsAb |
NON-REAC |
HBcAb (Total) |
NON-REAC |
HBsAg |
REACTIVE |
This serologic pattern may be found in either acute or chronic hepatitis B: HEPATITIS B CORE ANTIBODY, IgM has been reflexively ordered to resolve. |
HBsAb |
NON-REAC |
HBcAb (Total) |
REACTIVE |
HBsAg |
REACTIVE |
This pattern is not consistent with any phase of hepatitis B infection. Suggest repeating the test once in 2-4 weeks and/or consultation with a specialist if clinical conditions warrant. |
HBsAb |
REACTIVE |
HBcAb (Total) |
NON-REAC |
HBsAg |
REACTIVE |
This pattern is not consistent with any phase of hepatitis B infection. Suggest repeating the test once in 2-4 weeks and/or consultation with a specialist if clinical conditions warrant. |
HBsAb |
REACTIVE |
HBcAb (Total) |
REACTIVE |
HBsAg -Hepatitis B surface antigen; HBsAb - Hepatitis B surface antibody; HBcAb (total) - Hepatitis B core total antibody.
3. Hepatitis C a. Reactive hepatitis C antibody indicates either acute or chronic hepatitis C infection. The Hepatitis C Virus RNA, Quantitative test (test code HCVQT) may be used to detect ongoing viral replication. Immune status cannot be determined with this assay.