It should be noted that the prevalence data are limited to an adult HIV-infected ZD1839 cohort comprising predominantly homosexual men (60.5%), of White ethnicity (75%) and born in the UK (56.5%). All patients at diagnosis (Ia). A positive screening antibody test should be followed by an HCV RNA test to confirm current infection (Ia). An HCV antibody test should be repeated regularly in those who test initially negative (IIb). IDUs and MSM are the groups at highest risk of infection and should be screened yearly (IV). HCV RNA (rather than antibody) testing is recommended in those who cleared a previous infection either spontaneously or after treatment and are at ongoing
recognized risk of reinfection (IIb). The screening interval should be dictated by transaminase levels and/or risk behaviour and could be yearly as a general guide (IV). HCV RNA testing is not routinely recommended in patients who test antibody negative unless recent infection is strongly suspected or persistent and unexplained rises in transaminases are observed (IIb). 7.0%. Higher in routine screening as this does not include neutralizing antibody testing The reader is referred to the BHIVA immunization guidelines  for a detailed description
of the indications and modalities for screening and vaccination. Further information is available from the BHIVA guidelines for the management of coinfection with HIV-1 and HBV click here or HCV . For patients eligible for hepatitis A virus (HAV) vaccination, the use of pre-vaccination HAV immunoglobulin G (IgG) (or total) antibody testing should be decided locally; evidence indicates that testing may be cost-effective in most clinical settings [4, 5]. Post-vaccination testing is not routinely required . For hepatitis B, testing for surface antigen
(HBsAg), anti-core antibody (anti-HBc, total) and anti-surface antibody (anti-HBs) is recommended at the time of diagnosis to identify both infected patients (HBsAg positive) and patients lacking immunity (anti-HBc and anti-HBs negative) who should MYO10 be offered vaccination. Vaccine recipients should be tested for anti-HBs 6–8 weeks after vaccination, and yearly thereafter2. Patients who test HBsAg negative, anti-HBc antibody positive and anti-HBs antibody negative should be tested for anti-HBV envelope (HBe) antibody as a further marker of past infection. Subsequent routine testing depends on the initial results. Patients with evidence of a past infection (anti-HBc and anti-HBs or anti-HBe antibody positive) should be tested for HBsAg alone at yearly intervals to detect a possible reactivation, patients with isolated anti-HBc should be vaccinated, and vaccine nonresponders should be tested yearly for HBsAg, anti-HBc and anti-HBs to identify new infections . All newly diagnosed patients should be tested for HCV antibodies and the test should be repeated at yearly intervals in those who initially test negative.