occult hepatitis b (ohb), or persistent hepatitis b virus (hbv) viremia in surface-antigen-hbsag-negative patients, has been recognized as a medical concern during the last decade. the exact magnitude, pathogenesis and clinical relevance of ohb are unclear. this review organizes the published data on ohb and presents an overview of the current hypotheses on ohb's pathogenesis and clinical relev...

abstract background: hepatitis b virus (hbv) infection in patients who lack detectable hepatitis b surface antigen (hbsag) is called occult hepatitis b infection. such infections have been frequently identified in patients with chronic hepatitis cliver disease, but their prevalence is not known. methods: 207 patients with chronic hepatitis c who were hcv -rna and antihcv positive were studied f...

conclusions hbv vaccination in infancy is effective at preventing chronic hbv infection but is less effective at preventing occult hbv infection. similar studies examining the efficacy of adult hbv vaccination in preventing occult hbv have not been performed. this case highlights the importance of carefully determining the hbv status of high-risk individuals, as vaccination history and the pres...

background: blood transfusion plays a great role in public health and the blood safety still has remained a main concern. hbv has been considered as one of the most prevalent blood borne infections. it is estimated that chronic hbv affects 350-400 million people worldwide. comprehensive knowledge about hbv has high importance in iran due to high number of blood dependent patients. material and ...

conclusions in our study, only hbv genotype d was found among all the positive hbsag and occult hbv infection. moreover, high prevalence (40.7%) of occult hbv infection was determined among patients suffered from cryptogenic cirrhosis. results eleven (40.7%) out of 27 hbv cryptogenic cirrhosis and all 11 hbsag-positive patients were positive for hbv dna. the seroprevalences of hepatitis b virus...

conclusions in conclusion, occult hbv was found in 36% of patients with negative results for hbsag, but positive results for hcv. detection of hbv-dna in both pbmcs and plasma together in comparison with plasma alone provided more true identification of obi.the svr rate was significantly higher in coinfected patients than mono-infected ones. background occult hepatitis b virus (hbv) infection (...

Background and Objective: Infection with the hepatitis C virus (HCV) is an endemic public health problem with long-term consequences, especially in Egypt. Egypt has one of the highest incidence rates of HCV worldwide. The current cross-sectional study aims to determine how prevalent occult HCV infection is and how it affects the individual's immune response. Methods: The studied adult patient...

background the occult hepatitis b infection (obi) is defined as the presence of hepatitis b virus (hbv) dna in the sera or in the liver biopsy and the absence of hepatitis b surface antigen (hbsag) by serological test. objectives the current study aimed to evaluate the occult hbv infection by polymerase chain reaction (pcr) and determine hbv genotyping among the patients with abnormal alanine t...

BACKGROUND Occult infection with hepatitis B virus (HBV) is a type of chronic HBV infection that is characterized by the absence of a detectable hepatitis B surface antigen in the blood and by very low levels of HBV DNA in the blood and liver. The mechanisms leading to occult HBV infection remain poorly understood but include possible genetic mutations and deletions. Recently, it has been shown...