Hepatitis B is transmitted through perinatal, percutaneous, sexual, and close person-to-person contact, ie by open cuts and sores.
Human hepatitis B virus belongs to the family of Hepadnaviridae of small, enveloped, primarily hepatotropic DNA viruses. The virus replicates in the host and assembles exclusively in the hepatocytes and virions are released non-cytopathically through the cellular secretory pathway.
Chronic hepatitis B is defined as a chronic necroinflammatory liver disease due to persistent hepatitis B virus infection.
Hepatitis D infection is found only in patients with hepatitis B as it requires the hepatitis B outer coat. It is transmitted through sexual and percutaneous (especially IV drug use) routes.
Hepatitis B and D both have an incubation period of 30-180 days.
Dr Rajneesh Kumar, a senior consultant at the Department of Gastroenterology and Hepatology, Singapore General Hospital, highlights the high prevalence of hepatitis, and speaks to Roshini Claire Anthony about the transmission, prevention, and treatment of the disease.
Antiviral treatment with tenofovir alafenamide fumarate (TAF) during pregnancy in highly viraemic mothers effectively prevents mother-to-child transmission (MTCT) of hepatitis B virus (HBV) with no safety concerns, according to two studies presented during the AASLD 2020 Liver Meeting.
Tenofovir alafenamide (TAF) keeps chronic hepatitis B virus (HBV) in check through 5 years of treatment, with an added benefit of improving bone and kidney safety outcomes in patients who have switched from tenofovir disoproxil fumarate (TDF), according to data from two ongoing phase III studies.
In highly viraemic mothers, initiating treatment with tenofovir alafenamide fumarate (TAF) at the 13th gestational week or later in pregnancy puts a lid on hepatitis B virus (HBV) and prevents vertical transmission when infants receive standard immunoprophylaxis, as shown in a study.
Use of pegylated interferon alpha 2a as an add-on therapy in chronic hepatitis B patients on tenofovir disoproxil fumarate facilitates rapid reductions in hepatitis B surface antigen (HBsAg) and core-related antigen (HBcrAg) levels, a study has shown.
In virologically suppressed patients with chronic hepatitis B virus (HBV) infection, switching from tenofovir disoproxil fumarate (TDF) to tenofovir alafenamide (TAF) did not affect their rates of viral suppression, according to the final 96-week analysis of a phase III study.
A trivalent vaccine against hepatitis (hep B) is safe and effectively elicits robust immune response compared with a monovalent Hep B vaccine, according to the PROTECT and CONSTANT studies presented during the 2020 digital ILC.
Persistent hepatitis B virus (HBV) replication contributes to an increased risk of hepatocellular carcinoma (HCC), and suppressing this replication with tenofovir disoproxil fumarate yields greater HCC risk reduction than with entecavir, according to the results of a meta-analysis.
Dr. Hsu Li Yang, Dr. Tan Thuan Tong, Dr. Andrea Kwa,
08 Jan 2021
Antimicrobial resistance has become increasingly dire as the rapid emergence of drug resistance, especially gram-negative pathogens, has outpaced the development of new antibiotics. At a recent virtual symposium, Dr Hsu Li Yang, Vice Dean (Global Health) and Programme Leader (Infectious Diseases), NUS Saw Swee Hock School of Public Health, presented epidemiological data on multidrug-resistant (MDR) gram-negative bacteria (GNB) in Asia, while Dr Tan Thuan Tong, Head and Senior Consultant, Department of Infectious Diseases, Singapore General Hospital (SGH), focused on the role of ceftazidime-avibactam in MDR GNB infections. Dr Andrea Kwa, Assistant Director of Research, Department of Pharmacy, SGH, joined the panel in an interactive fireside chat, to discuss challenges, practical considerations, and solutions in MDR gram-negative infections. This Pfizer-sponsored symposium was chaired by Dr Ng Shin Yi, Head and Senior Consultant of Surgical Intensive Care, SGH.