Hepatitis B and C virus infection in Crohn's disease

Serological Profiles of Hepatitis B Virus in Patients With Crohn's Disease Undergoing Anti-Tumor Necrosis Factor Alpha (TNFα) Therapy at Ibn Sina University Hospital, Rabat

Introduction Anti-tumor necrosis factor alpha (TNFα) therapies have revolutionized the management of Crohn's disease (CD). However, they increase the risk of viral reactivation, particularly hepatitis B virus (HBV). This study aims to define the HBV serological profiles of patients with CD who are candidates for biological therapy, identifying profiles at potential risk for reactivation or exacerbation following immunosuppressive treatment. Materials and methods This descriptive retrospective study included patients with CD, aged over 16 years, who were candidates for anti-TNFα treatment at Ibn Sina University Hospital Center (UHC) in Rabat, Morocco, from January 2015 to March 2023. The serological profiles of patients, including hepatitis B surface antigen (HBsAg), hepatitis B surface antibodies, and total hepatitis B core antibodies (HBcAb), were determined using microparticle chemiluminescence immunoassay with the ARCHITECT i2000sr or Alinity (Abbott Diagnostics, Chicago, Illinois, United States) automated systems at the Central Virology Laboratory (CVL) of Ibn Sina UHC Rabat. HBV DNA quantification was performed using the m2000 Abbott Diagnostic or GeneXpert system. Results Out of 249 patients with CD who were candidates for biological therapy, 131 (52.6%) received anti-TNFα treatment, including 39 (29.8%) with adalimumab and 92 (70.2%) with infliximab. The median age was 41 years, and the male-to-female ratio was 0.52. The overall HBV screening rate before starting biological therapy was 68.7%. HBV screening was conducted for 90 patients at the CVL, where serological marker analysis categorized five distinct profiles. A majority of patients (65, 72.2%) had negative serological profiles for HBV, while 10 (11.1%) were immunized via vaccination. Profiles at risk of viral reactivation or worsening following immunosuppressive therapy included 12 (13.3%) patients immunized by contact, two (2.3%) with isolated HBcAb, and one (1.1%) with active viral hepatitis (positive HBsAg and HBcAb), who was initiated on tenofovir 300 mg before starting combination therapy. No cases of primary infection or viral B reactivation were observed during the study. Conclusions In our study, 15 patients (16.7%) exhibited a potential risk of viral reactivation or worsening of HBV following the initiation of immunosuppressive therapy. The authors recommend precise patient selection, thorough pretreatment evaluation, and regular follow-up during therapy to minimize adverse events associated with anti-TNFα treatment. Additionally, a prophylactic or preemptive strategy should be considered. The risk of late reactivation after discontinuation of biological therapy should also be carefully monitored.

Prevalence of hepatitis B virus and hepatitis C virus infection in patients with inflammatory bowel disease: a systematic review and meta-analysis

BACKGROUND/AIMS

The data on the prevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) infection in patients with inflammatory bowel disease (IBD) are conflicting. The present systematic review was thus conducted to study the prevalence of HBV and HCV markers in patients with IBD.

METHODS

A comprehensive literature search of 3 databases was conducted from 2000 to April 2022 for studies evaluating the prevalence of HBV or HCV in patients with IBD. Pooled prevalence rates across studies were expressed with summative statistics.

RESULTS

A total of 34 studies were included in the final analysis. The pooled prevalence of hepatitis B surface antigen (HBsAg) and hepatitis B core antibodies were 3.3% and 14.2%, respectively. In HBsAg positive IBD patients, hepatitis B e antigen positivity and detectable HBV DNA were seen in 15.3% and 61.0% of patients, respectively. Only 35.6% of the IBD patients had effective HBV vaccination. The pooled prevalence of anti-HCV and detectable HCV RNA were 1.8% and 0.8%, respectively. The pooled prevalence of markers of HBV infection was higher in Asian studies, while the prevalence of markers of HCV infection was higher in European studies. The prevalence of viral hepatitis markers was similar between IBD patients and the general population and that between ulcerative colitis and Crohn's disease.

CONCLUSIONS

The prevalence of markers of viral hepatitis remains same as the general population with significant regional variations, although the quality of evidence remains low due to publication bias. Only a small proportion of IBD patients had an effective HBV vaccination, requiring improvement in screening and vaccination practices.

Core indicators of an evaluation and guidance system for quality of care in inflammatory bowel disease centers: A critical review

The mission of the IBD Quality Care Evaluation Center (IBDQCC) is to establish indicators of quality of care (QoC), certify IBD units to generate a network of IBD quality care, and eventually improve the national level of IBD healthcare. The final list of 28 core and 13 secondary IBD QoC indicators suitable for the healthcare system in China were selected using a Delphi consensus methodology. Units that met all core indicators were qualified as "regional"; units that met all core indicators together with more than 50% of the secondary indicators received a rating of "excellence." Using the selected QoC core indicators for certifying IBD units, a network of IBD quality care units covering the majority of IBD patients in China was established.

Funding

This work was financially supported by Cultivation Funding for Clinical Scientific Research Innovation, Renji Hospital, School of Medicine, Shanghai Jiaotong University (RJPY-LX-004), National Natural Science Foundation of China (No. 81,770,545), Shanghai Science and Technology Innovation Initiative (21SQBS02302), and Cultivated Funding for Clinical Research Innovation, Renji Hospital, School of Medicine, Shanghai Jiaotong University (RJPY-LX-004).

Liver manifestations and complications in inflammatory bowel disease: A review

Hepatobiliary manifestations are common in inflammatory bowel disease (IBD), with 30% of patients presenting abnormal liver tests and 5% developing chronic liver disease. They range from asymptomatic elevated liver tests to life-threatening disease and usually follow an independent course from IBD. The pathogenesis of liver manifestations or complications and IBD can be closely related by sharing a common auto-immune background (in primary sclerosing cholangitis, IgG4-related cholangitis, and autoimmune hepatitis), intestinal inflammation (in portal vein thrombosis and granulomatous hepatitis), metabolic impairment (in non-alcoholic fatty liver disease or cholelithiasis), or drug toxicity (in drug induced liver injury or hepatitis B virus infection reactivation). Their evaluation should prompt a full diagnostic workup to identify and readily treat all complications, improving management and outcome.

Canadian Association of Gastroenterology Clinical Practice Guideline for Immunizations in Patients With Inflammatory Bowel Disease (IBD)-Part 2: Inactivated Vaccines

BACKGROUND AND AIMS

The effectiveness and safety of vaccinations can be altered by immunosuppressive therapies, and perhaps by inflammatory bowel disease (IBD) itself. These recommendations developed by the Canadian Association of Gastroenterology and endorsed by the American Gastroenterological Association, aim to provide guidance on immunizations in adult and pediatric patients with IBD. This publication focused on inactivated vaccines.

METHODS

Systematic reviews evaluating the efficacy, effectiveness, and safety of vaccines in patients with IBD, other immune-mediated inflammatory diseases, and the general population were performed. Critical outcomes included mortality, vaccine-preventable diseases, and serious adverse events. Immunogenicity was considered a surrogate outcome for vaccine efficacy. Certainty of evidence and strength of recommendations were rated according to the GRADE (Grading of Recommendation Assessment, Development, and Evaluation) approach. Key questions were developed through an iterative online platform, and voted on by a multidisciplinary group. Recommendations were formulated using the Evidence-to-Decision framework. Strong recommendation means that most patients should receive the recommended course of action, whereas a conditional recommendation means that different choices will be appropriate for different patients.

RESULTS

Consensus was reached on 15 of 20 questions. Recommendations address the following vaccines: Haemophilus influenzae type b, recombinant zoster, hepatitis B, influenza, pneumococcus, meningococcus, tetanus-diphtheria-pertussis, and human papillomavirus. Most of the recommendations for patients with IBD are congruent with the current Centers for Disease Control and Prevention and Canada's National Advisory Committee on Immunization recommendations for the general population, with the following exceptions. In patients with IBD, the panel suggested Haemophilus influenzae type b vaccine for patients older than 5 years of age, recombinant zoster vaccine for adults younger than 50 year of age, and hepatitis B vaccine for adults without a risk factor. Consensus was not reached, and recommendations were not made for 5 statements, due largely to lack of evidence, including double-dose hepatitis B vaccine, timing of influenza immunization in patients on biologics, pneumococcal and meningococcal vaccines in adult patients without risk factors, and human papillomavirus vaccine in patients aged 27-45 years.

CONCLUSIONS

Patients with IBD may be at increased risk of some vaccine-preventable diseases. Therefore, maintaining appropriate vaccination status in these patients is critical to optimize patient outcomes. In general, IBD is not a contraindication to the use of inactivated vaccines, but immunosuppressive therapy may reduce vaccine responses.

Canadian Association of Gastroenterology Clinical Practice Guideline for Immunizations in Patients With Inflammatory Bowel Disease (IBD)-Part 2: Inactivated Vaccines

BACKGROUND AND AIMS

The effectiveness and safety of vaccinations can be altered by immunosuppressive therapies, and perhaps by inflammatory bowel disease (IBD) itself. These recommendations developed by the Canadian Association of Gastroenterology and endorsed by the American Gastroenterological Association, aim to provide guidance on immunizations in adult and pediatric patients with IBD. This publication focused on inactivated vaccines.

METHODS

Systematic reviews evaluating the efficacy, effectiveness, and safety of vaccines in patients with IBD, other immune-mediated inflammatory diseases, and the general population were performed. Critical outcomes included mortality, vaccine-preventable diseases, and serious adverse events. Immunogenicity was considered a surrogate outcome for vaccine efficacy. Certainty of evidence and strength of recommendations were rated according to the GRADE (Grading of Recommendation Assessment, Development, and Evaluation) approach. Key questions were developed through an iterative online platform, and voted on by a multidisciplinary group. Recommendations were formulated using the Evidence-to-Decision framework. Strong recommendation means that most patients should receive the recommended course of action, whereas a conditional recommendation means that different choices will be appropriate for different patients.

RESULTS

Consensus was reached on 15 of 20 questions. Recommendations address the following vaccines: Haemophilus influenzae type b, recombinant zoster, hepatitis B, influenza, pneumococcus, meningococcus, tetanus-diphtheria-pertussis, and human papillomavirus. Most of the recommendations for patients with IBD are congruent with the current Centers for Disease Control and Prevention and Canada's National Advisory Committee on Immunization recommendations for the general population, with the following exceptions. In patients with IBD, the panel suggested Haemophilus influenzae type b vaccine for patients older than 5 years of age, recombinant zoster vaccine for adults younger than 50 year of age, and hepatitis B vaccine for adults without a risk factor. Consensus was not reached, and recommendations were not made for 5 statements, due largely to lack of evidence, including double-dose hepatitis B vaccine, timing of influenza immunization in patients on biologics, pneumococcal and meningococcal vaccines in adult patients without risk factors, and human papillomavirus vaccine in patients aged 27-45 years.

CONCLUSIONS

Patients with IBD may be at increased risk of some vaccine-preventable diseases. Therefore, maintaining appropriate vaccination status in these patients is critical to optimize patient outcomes. In general, IBD is not a contraindication to the use of inactivated vaccines, but immunosuppressive therapy may reduce vaccine responses.

Management of hepatitis B virus infection in patients with inflammatory bowel disease under immunosuppressive treatment

Hepatitis B remains a significant global clinical problem, despite the implementation of safe and effective vaccination programs. The prevalence of hepatitis B virus (HBV) in patients with inflammatory bowel disease (IBD) largely follows the regional epidemiologic status. Serological screening with hepatitis B surface antigen (HBsAg), and antibodies to hepatitis B surface (anti-HBs) and core (anti-HBc) proteins is a key element in the management of IBD patients and, ideally, should be performed at IBD diagnosis. Stratification of individual cases should be done according to the serologic profile and the IBD-specific treatment, with particular emphasis in patients receiving immunosuppressive regimens. In patients who have not contracted HBV, vaccination is indicated to accomplish protective immunity. Vaccination in immunosuppressed patients, however, is a challenging issue and several strategies for primary and revaccination have been proposed. The risk of HBV reactivation in patients with IBD should be considered in both HBsAg-positive and HBsAg-negative/anti-HBc-positive patients, when immunosuppressive therapies are administered. HBV reactivation is preventable via the administration of prophylactic nucleot(s)ide analogues and should be the standard approach in HBsAg-positive patients. HBsAg-negative/anti-HBc-positive patients represent a non-homogeneous group and bear a significantly lower risk of HBV reactivation. Biochemical, serological and molecular monitoring is currently the recommended approach for anti-HBc patients. Acute HBV infection is rarely reported in IBD patients. In the present review, we outline the problems associated with HBV infection in patients with IBD and present updated evidence for their management.

Interferon-Induced Crohn's Disease: An Unusual Side Effect of Interferon Therapy in a Patient With Chronic Hepatitis C Virus Infection

Gastrointestinal side effects of interferon (IFN) therapy for chronic hepatitis C virus (HCV) infection are non-specific. Rarely, this therapy has been reported to induce ischemic colitis and even ulcerative colitis. However, IFN-induced Crohn's disease (CD) has previously been reported in only two individuals. We share our own experience of a patient treated for chronic HCV infection who developed CD after IFN therapy for chronic HCV infection. A 28-year-old asymptomatic man with a history only of chronic HCV infection was treated with IFN and ribavirin, which he tolerated for 18 months and achieved sustained viral response (SVR). Halfway through the IFN regimen, he noticed infrequent painful bowel movements and bloody diarrhea. Following treatment, his symptoms resolved. Six months after therapy, colonoscopy showed a normal terminal ileum and colitis with skipped lesions and rectal sparing. Pathology demonstrated spotty chronic active colitis, with diffuse cryptitis, crypt distortion, and abundant abscesses, compatible with CD. The patient declined treatment and remained asymptomatic for two years. Labs including C-​reactive protein (CRP), erythrocyte sedimentation rate (ESR), fecal calprotectin, and celiac panel were normal. Upper GI endoscopy and capsule endoscopy were normal. Repeat colonoscopy showed normal terminal ileum and normal colonic mucosa, and biopsies of the terminal ileum and all segments of the colon were unremarkable. The patient was observed off treatment and has continued to remain asymptomatic, with a resolution of symptoms and disease continuing away from IFN exposure. This is a rare case of CD induced by IFN, exhibiting significant importance regarding the evaluation of new cases of inflammatory bowel disease (IBD). Gastroenterologists need to keep in mind that INF therapy can be an uncommon cause of IBD.

Prevalence of serological markers of hepatitis B in inflammatory bowel disease - Experience from a tertiary care centre in South India

Inflammatory bowel disease patients are at risk of hepatitis B infection. Data on this prevalence from South Asia are limited. We conducted a prospective study comprising of 76 inflammatory bowel disease patients between October 2013 and August 2014. Prevalence of hepatitis B surface antigen in inflammatory bowel disease, ulcerative colitis and Crohn's disease patients were 2.6%, 2.4% and 3% respectively and that of markers of hepatitis B exposure (hepatitis B surface antigen /hepatitis B core antibody) were 11.8%, 14.3% and 9.1% respectively. Risk factors found significantly more common in those positive for viral markers compared to those negative were age, non-inflammatory bowel disease related surgery and hospital admission. Only 7(9.2%) had completed hepatitis B vaccination. There is a need to create awareness among physicians regarding the importance of hepatitis B screening and vaccination in inflammatory bowel disease patients.

Review article: safety of new biologic agents for inflammatory bowel disease in the liver

New biologic agents (vedolizumab, ustekinumab and tofacitinib) represent an effective treatment for inflammatory bowel diseases and have been recently approved. However, with a rapidly evolving complement of advanced targeted therapies, new concerns about their potentially undesirable effects on liver function emerge. In particular, little is known about safety data in patients with hepatitis B virus, hepatitis C virus chronic infections, cirrhosis and in transplanted patients who are accumulating. In addition, these new agents have also been associated with drug-induced liver injury. Limited data on the efficacy of vedolizumab in patients with primary sclerosing cholangitis are also available. This article reviews available data about hepatic safety concerns in patients receiving vedolizumab, ustekinumab and tofacitinib with and without preexistent hepatic diseases.

Molecular Characterization and Seroprevalence of Hepatitis E Virus in Inflammatory Bowel Disease Patients and Solid Organ Transplant Recipients

Seroprevalence rates and molecular characterization of hepatitis E virus (HEV) prevalent in the Lithuanian human population has not yet been evaluated. Immunosuppressed individuals have been recognized as a risk group for chronic hepatitis due to HEV genotype 3 (HEV-3) infections. The objectives of the present study were to determine prevalence rates of anti-HEV antibodies among inflammatory bowel disease (IBD) patients and solid organ transplant (SOT) recipients, to isolate and characterize HEV strain present in the Lithuanian human population, and to investigate its capacity to infect non-human primate (MARC-145 and Vero), swine (PK-15) and murine (Neuro-2a) cells in vitro. In the present study, the significant difference of anti-HEV IgG prevalence between healthy (3.0% (95% CI 0-6.3)) and immunosuppressed individuals (12.0% [95% CI 8.1-15.9]) was described. Moreover, our findings showed that anti-HEV IgG seropositivity can be significantly predicted by increasing age (OR = 1.032, p < 0.01), diagnosis of IBD (OR = 4.541, p < 0.01) and reception of SOT (OR = 4.042, <0.05). Locally isolated HEV strain clustered within genotype 3i subtype of genotype 3 and was capable of infecting MARC-145 cells. This study demonstrates higher HEV seroprevalence in the risk group compared to healthy control individuals without confidence interval overlap. The high level of genetic homology between human and animal strains in Lithuania and the capacity of locally isolated strains to infect cells of non-human origin suggests its potential for zoonotic transmission.

Chronic Viral Hepatitis in a Cohort of Inflammatory Bowel Disease Patients from Southern Italy: A Case-Control Study

We performed an epidemiologic study to assess the prevalence of chronic viral hepatitis in inflammatory bowel disease (IBD) and to detect their possible relationships. Methods: It was a single centre cohort cross-sectional study, during October 2016 and October 2017. Consecutive IBD adult patients and a control group of non-IBD subjects were recruited. All patients underwent laboratory investigations to detect chronic hepatitis B (HBV) and C (HCV) infection. Parameters of liver function, elastography and IBD features were collected. Univariate analysis was performed by Student's t or chi-square test. Multivariate analysis was performed by binomial logistic regression and odds ratios (ORs) were calculated. We enrolled 807 IBD patients and 189 controls. Thirty-five (4.3%) had chronic viral hepatitis: 28 HCV (3.4%, versus 5.3% in controls, p = 0.24) and 7 HBV (0.9% versus 0.5% in controls, p = 0.64). More men were observed in the IBD-hepatitis group (71.2% versus 58.2%, p < 0.001). Patients with IBD and chronic viral hepatitis had a higher mean age and showed a higher frequency of diabetes, hypertension and wider waist circumference. They suffered more frequently from ulcerative colitis. Liver stiffness was greater in subjects with IBD and chronic viral hepatitis (7.0 ± 4.4 versus 5.0 ± 1.2 KPa; p < 0.001). At multivariate analysis, only old age directly correlated with viral hepatitis risk (OR = 1.05, 95%CI 1.02-1.08, p < 0.001). In conclusion, the prevalence of HBV/HCV in IBD is low in our region. Age may be the only independent factor of viral hepatitis-IBD association. Finally, this study firstly measured liver stiffness in a large scale, showing higher values in subjects with both diseases.

Hepatic Complications of Inflammatory Bowel Disease

Hepatobiliary disorders are commonly encountered in patients with inflammatory bowel disease (IBD). Although primary sclerosing cholangitis is the stereotypical hepatobiliary disorder associated with IBD, other diseases, including autoimmune hepatitis and nonalcoholic fatty liver disease, also are encountered in this population. Several agents used for treatment of IBD may cause drug-induced liver injury, although severe hepatotoxicity occurs infrequently. Furthermore, reactivation of hepatitis B virus infection may occur in patients with IBD treated with systemic corticosteroids and biologic agents.

Nonimmunity against hepatitis B virus infection in patients newly diagnosed with inflammatory bowel disease

Background/Aims

This study aimed to elucidate the prevalence of hepatitis B virus (HBV) serologic markers in Korean patients newly diagnosed with, but not yet treated for inflammatory bowel disease (IBD).

Methods

We prospectively enrolled 210 patients newly diagnosed with IBD (109 with ulcerative colitis and 101 with Crohn's disease). Hepatitis B surface antigen (HBsAg), hepatitis B surface antibody (anti-HBs), and hepatitis B core antibody (anti-HBc) levels were measured and compared with those of 1,100 sex- and age-matched controls.

Results

The prevalence of chronic HBV infection (positive HBsAg, positive anti-HBc, and negative anti-HBs results) and past infection (negative HBsAg, positive anti-HBc, and positive or negative anti-HBs results) were not significantly different between the patients and controls (chronic HBV infection: IBD, 3.8% vs. control, 4.9%, P=0.596; past infection: IBD, 26.2% vs. control, 28.8%, P=0.625). The patients with IBD aged <20 years were at a higher susceptibility risk (nonimmune) for HBV infection than the controls (IBD, 41.5% vs. control, 22.4%; P=0.018). In the multivariate analysis, an age of <20 years (P=0.024) and symptom duration of ≥12 months before diagnosis (P=0.027) were identified as independent risk factors for nonimmunity against HBV infection.

Conclusions

The patients newly diagnosed with IBD were susceptible to HBV infection. The frequency of nonimmunity was high, especially in the patients aged <20 years and those with a longer duration of symptoms before diagnosis. Therefore, it is necessary to screen for HBV serologic markers and generate a detailed vaccination plan for patients newly diagnosed with IBD.

Harmful Effects and Potential Benefits of Anti-Tumor Necrosis Factor (TNF)-α on the Liver

Anti-tumor necrosis factor (TNF)-α agents represent an effective treatment for chronic inflammatory diseases. However, some concerns about their potentially undesirable effects on liver function have been reported. On the other hand, evidence of their therapeutic effects on certain liver diseases is accumulating. Many data showed the safety of anti-TNF-α in patients with chronic hepatitis B and C and in liver transplanted patients even if a strict follow-up and prophylaxis are recommended in well-defined subgroups. On the other side, anti-TNF-α-induced liver injury is not a rare event. However, it is often reversible after anti-TNF-α withdrawal. Anti-TNF-α agents have been tested in advanced stages of severe alcoholic hepatitis and non-alcoholic fatty liver disease. Limited data on the efficacy of anti-TNF-α in patients with autoimmune hepatitis and primary biliary cholangitis are also available. In this review, we explored the hepatic safety concerns in patients receiving anti-TNF-α agents with and without pre-existent hepatic diseases. In addition, the available evidence on their potential benefits in the treatment of specific hepatic diseases is discussed.

Timing Strategies of Direct-Acting Antivirals and Biologics Administration in HCV-Infected Subjects with Inflammatory Bowel Diseases

Background: In the last years, inflammatory bowel disease (IBD) and hepatitis C virus (HCV) infection management has completely changed. However, the role of direct-acting antivirals (DAAs) and the correct timing of antiviral drugs administration in IBD patients needing biologics has not been evaluated. Objective: To discuss the management of HCV-infected IBD patients, focusing our attention on the timing of DAAs administration subjects needing biologics. Methods: Relevant articles addressing HCV management in patients needing biologics were identified by searching from PubMed, MEDLINE and Scopus. Results: Three possible timing strategies were identified: (1) sequential strategy, meaning the choice of treating firstly the active IBD with biologics and then, once the acute phase has been controlled, treating the HCV infection; (2) concomitant strategy, that is the contemporaneous beginning of DAAs and biologics administration; (3) inverted sequential strategy-the administration of antiviral therapy before biologics in HCV-infected IBD patients. The potential pharmacological interactions between biologics and DAAs have also been reported. Conclusions: Clinical management of HCV-infected IBD patients remains a challenging problem for clinicians, especially in terms of timing choice. Recent published data about DAAs are very encouraging also in IBD patients. All strategies could be considered safe and effective. However, further data are immediately required in order to evaluate hepatic toxicity of novel immunosuppressive drugs in IBD.

Serology of Viral Infections and Tuberculosis Screening in an IBD Population Referred to a Tertiary Centre of Southern Italy

BACKGROUND

With the introduction of more potent immunosuppressive agents in inflammatory bowel disease, prevention of opportunistic infections has become necessary by introducing screening programs. Prevalence of the most important infectious agents may vary in different geographical areas. The aim of our study was to assess the immune status for hepatitis B, varicella, mononucleosis, and cytomegalovirus infection together with the determination of the hepatitis C and tuberculosis status in Southern Italy.

METHODS

Prevalence of latent tuberculosis, together with serology of hepatitis B and C, Epstein-Barr virus, varicella zoster, and cytomegalovirus were collected by analysing retrospectively the clinical charts of IBD patients. Data were integrated with demographic and clinical features.

RESULTS

Data from 509 IBD patients divided in two age groups showed a prevalence of HBV infection in nonvaccinated patients of 9%. Seroprotection (HBsAb) in vaccinated IBD patients was lower (p < 0.0001) compared with that in controls. Prevalences of herpesvirus infections fluctuate between 51% (CMV) and 85% (EBV) and 84% (VZV) in younger patients. Latent tuberculosis and hepatitis C infection were found only in patients > 37 years of age.

CONCLUSIONS

In younger patients, high susceptibility rates for primary herpesvirus infections should determine the choice of treatment. Loss of HBV seroprotection in already vaccinated patients should be considered for booster vaccination programs.

Prevalence of hepatitis B and C and factors for infection and nonimmune in inflammatory bowel disease patients in China

OBJECTIVE

The aims of this study were to investigate the prevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) infection in inflammatory bowel disease (IBD) patients and the risk factors related to the infection and nonimmune status.

METHODS

A retrospective study was carried out at two clinical centers. The prevalence of viral markers and risk factors related to HBV and HCV infection and nonimmune status were analyzed in IBD patients. Age-matched and sex-matched healthy individuals were recruited as the controls.

RESULTS

A total of 980 IBD patients were included in this study. Present and past HBV infection was detected in 41.21% of the IBD group, which was higher than that in the general population (P=0.003). Age older than 30 years (P=0.000), ulcerative colitis (P=0.002), and previous surgery (P=0.039) were found to be significant risk factors for HBV infection in the multivariate analysis. 36.43% of the patients in the IBD group had nonimmune status against HBV, and age less than 40 years (P=0.011) and Crohn's disease (P=0.002) were identified as independent risk factors in the multivariate analysis. The prevalence of HCV infection was low and similar to that of the general population.

CONCLUSION

The prevalence of HBV infection in IBD patients in China was higher than that in Europe, USA, and the general population in China, but the prevalence of HCV infection in IBD patients was similar to that in the general population in this study. The frequency of nonimmune status against HBV was high, especially in young Crohn's disease patients, and HBV vaccination should be intensified and have a targeted coverage.

Hepatic Issues and Complications Associated With Inflammatory Bowel Disease: A Clinical Report From the NASPGHAN Inflammatory Bowel Disease and Hepatology Committees

Hepatobiliary disorders are common in patients with inflammatory bowel disease (IBD), and persistent abnormal liver function tests are found in approximately 20% to 30% of individuals with IBD. In most cases, the cause of these elevations will fall into 1 of 3 main categories. They can be as a result of extraintestinal manifestations of the disease process, related to medication toxicity, or the result of an underlying primary hepatic disorder unrelated to IBD. This latter possibility is beyond the scope of this review article, but does need to be considered in anyone with elevated liver function tests. This review is provided as a clinical summary of some of the major hepatic issues that may occur in patients with IBD.

Prevalence of hepatitis B, hepatitis C and human immunodeficiency viral infections in patients with inflammatory bowel disease in north India

BACKGROUND/AIMS

Patients with inflammatory bowel disease (IBD) often require immunosuppressive therapy and blood transfusions and therefore are at a high risk of contracting infections due to hepatitis B (HBV) and hepatitis C (HCV) and human immunodeficiency virus (HIV). In the present study, we assessed the prevalence of these infections in patients with IBD.

METHODS

This retrospective study included 908 consecutive patients with IBD (ulcerative colitis [UC], n=581; Crohn's disease [CD], n=327) who were receiving care at a tertiary care center. Ninety-five patients with intestinal tuberculosis (ITB) were recruited as disease controls. Prospectively maintained patient databases were reviewed for the prevalence of HBV surface antigen, anti-HCV antibodies, and HIV (enzyme-linked immunosorbent assay method). HCV RNA was examined in patients who tested positive for anti-HCV antibodies. Prevalence data of the study were compared with that of the general Indian population (HBV, 3.7%; HCV, 1%; HIV, 0.3%).

RESULTS

The prevalence of HBV, HCV, and HIV was 2.4%, 1.4%, and 0.1%, respectively, in the 908 patients with IBD. Among the 581 patients with UC, 2.2% (12/541) had HBV, 1.7% (9/517) had HCV, and 0.2% (1/499) had HIV. Among the 327 patients with CD, 2.8% (8/288) had HBV, 0.7% (2/273) had HCV, and 0% (0/277) had HIV. One patient with CD had HBV and HCV coinfection. The prevalence of HBV, HCV, and HIV in patients with ITB was 5.9% (4/67), 1.8% (1/57), and 1.2% (1/84), respectively.

CONCLUSIONS

The prevalence of HBV, HCV, and HIV in north Indian patients with IBD is similar to the prevalence of these viruses in the general community. Nonetheless, the high risk of flare after immunosuppressive therapy mandates routine screening of patients with IBD for viral markers.

Challenges in treating patients with inflammatory bowel disease and concurrent viral hepatitis infection

Inflammatory bowel diseases (IBD) require long-term administration of immunomodulatory treatments to maintain disease remission. Due to the high worldwide prevalence of hepatitis B (HBV) or C (HCV) virus infections, presence of concurrent hepatitis can be a relevant clinical issue to manage when treating IBD. Areas covered: The paper summarizes epidemiological data about IBD and HBV/HCV infection and reviews current knowledge about the natural history of HBV and HCV in the IBD setting, concentrating on risk of hepatitis reactivation during immunosuppressive treatment. Most updated recommendations for management of HBV and HCV infections in IBD patients are discussed. Expert commentary: The development of new drugs for IBD with different molecular targets and the availability of potent and efficacious antiviral drugs for HBV and HCV will simplify management of hepatitis infection in IBD patients in the near future.

Prevalence of hepatitis B and clinical outcomes in inflammatory bowel disease patients in a viral-endemic region

Background

Little is known of the prevalence of hepatitis B virus (HBV) infection and its effect on choice of therapy and disease course in patients with inflammatory bowel disease (IBD). We assessed the prevalence of HBV in Hong Kong as well as determinants of altered transaminases, effects of HBV infection on therapeutic strategy and clinical course in IBD.

Methods

In this retrospective cohort, hepatitis B surface antigen (HBsAg), liver function tests, and IBD disease characteristics were recorded. Logistic regression was used to identify factors associated with altered transaminases.

Results

Four hundred six IBD patients were recruited. HBV infection was found in 5.7 % patients in Hong Kong. The use of steroids (OR, 2.52; p = 0.010) and a previous history of surgery (OR 2.33; p = 0.026) were associated with altered transaminases in IBD. There was no significant difference in disease control and use of IBD medication between HBsAg-positive and HBsAg-negative IBD patients.

Conclusion

The prevalence of HBV among patients with IBD in Hong Kong (5.7 %) is similar to that of general population (~7 %). There was no difference in disease control and use of IBD medication between subjects with or without HBV.

Hepatitis B and immunosuppressive therapies for chronic inflammatory diseases: When and how to apply prophylaxis, with a special focus on corticosteroid therapy

Currently immunosuppressive and biological agents are used in a more extensive and earlier way in patients with inflammatory bowel disease, rheumatic or dermatologic diseases. Although these drugs have shown a significant clinical benefit, the safety of these treatments is a challenge. Hepatitis B virus (HBV) reactivations have been reported widely, even including liver failure and death, and it represents a deep concern in these patients. Current guidelines recommend to pre-emptive therapy in patients with immunosuppressants in general, but preventive measures focused in patients with corticosteroids and inflammatory diseases are scarce. Screening for HBV infection should be done at diagnosis. The patients who test positive for hepatitis B surface antigen, but do not meet criteria for antiviral treatment must receive prophylaxis before undergoing immunosuppression, including corticosteroids at higher doses than prednisone 20 mg/d during more than two weeks. Tenofovir and entecavir are preferred than lamivudine because of their better resistance profile in long-term immunosuppressant treatments. There is not a strong evidence, to make a general recommendation on the necessity of prophylaxis therapy in patients with inflammatory diseases that are taking low doses of corticosteroids in short term basis or low systemic bioavailability corticosteroids such as budesonide or beclomethasone dipropionate. In these cases regularly HBV DNA monitoring is recommended, starting early antiviral therapy if DNA levels begin to rise. In patients with occult or resolved hepatitis the risk of reactivation is much lower, and excepting for Rituximab treatment, the prophylaxis is not necessary.

Approach and management of patients with chronic hepatitis B and C during the course of inflammatory bowel disease

Inflammatory bowel disease and chronic viral hepatitis are 2 distinct but common conditions throughout the world. Mostly, both need life-long follow-up. Since immunosuppressive drugs remain corner stones of inflammatory bowel disease management, one should be aware of the concomitant presence of chronic viral hepatitis in such patients to prevent serious (even fatal) outcomes. Recently, new treatment options have become available in the treatment of both inflammatory bowel disease and chronic viral hepatitis. In this review, we have discussed and summarized current treatment and follow-up strategies for those 2 important public health issues in light of available literature.

[Hepatitis B virus infection in pregnancy and the immunosuppressed patient]

Hepatitis B virus (HBV) infection continues to be a major public health problem worldwide. Although treatment indications are well established in clinical practice guidelines, there are some risk groups, such as pregnant women and immunosuppressed patients, who require different and specific management of HBV infection. In pregnant women, treatment indication should be individualized and the risk of HBV transmission to the newborn evaluated because cases of vertical transmission continue to be reported, despite active and passive immunoprophylaxis. In patients receiving immunosuppressive therapy, HBV reactivation is associated with high morbidity and mortality, even in patients with past HBV infection, highlighting the importance of screening and the need to evaluate prophylactic therapy in some cases.

Hepatitis B and C virus reactivation in immunosuppressed patients with inflammatory bowel disease

In recent years, a number of case reports and clinical studies have highlighted the risk of hepatitis B and C virus reactivation in patients with inflammatory bowel disease who are treated with immunosuppressive drugs. The cases of viral hepatitis reactivation that have been reported are characterized by a wide range of clinical manifestations, from viremia without clinically relevant manifestations to fulminant life-threatening hepatitis. The development and dissemination of biological immunosuppressive drugs have led to a significant increase in the number of reports of interest to physicians in a variety of clinical settings. On this topic, there have been a number of published guidelines and reviews that have collected the available evidence, providing recommendations on prophylactic and therapeutic strategies and methods for monitoring patients at risk. However, it should be noted that, to date, very few clinical studies have been published, and most of the recommendations have been borrowed from other clinical settings. The published studies are mostly retrospective and are based on very heterogeneous populations, using different therapeutic and prophylactic regimens and obtaining conflicting results. Thus, it seems clear that it is desirable to concentrate our efforts on prospective studies, not conducting further reviews of the literature in the continued absence of new evidence.

Prevalence and factors related to hepatitis B and C infection in inflammatory bowel disease patients in China: a retrospective study

OBJECTIVES

The objectives of this retrospective study were to assess the prevalence of HBV and HCV infection in Chinese IBD patients, identify potential risk factors of the infection in this population, and discuss the prevalence of HBV and HCV in the general Chinese population.

METHODS

A total of 714 IBD patients who had been investigated for HBV and/or HCV infection were consecutively enrolled in the study. Clinical and laboratory data on IBD and hepatitis infection were collected. A control group of 22,373 healthy individuals was also included in the study.

RESULTS

Present and past HBV infection was found in 40.62% of IBD patients (ulcerative colitis: HBsAg+, 5.68%; anti-HBc+, 41.64%; Crohn's disease: HBsAg+, 5.29%; anti-HBc+, 39.80%;), and 27.58% of the non-IBD group (HBsAg+, 5.52%; anti-HBc+, 27.58% [P = 0.00]). HCV infection was found in 0.42% of IBD patients and 0.36% of the non-IBD group (P=0.80). One hundred and fifty-four of the IBD patients (21.57%) had been effectively vaccinated for HBV. In a multivariate analysis, age, family history of hepatitis B, and IBD-related admission were significantly related to HBV infection in IBD patients. Potential risk factors for HCV were not analyzed due to the limited number of HCV-positive patients in the study.

CONCLUSIONS

Prevalence of HBV infection in IBD patients was higher than that in the non-IBD patients, whereas prevalence of HCV infection was similar to that of the non-IBD group. Effective vaccination for HBV was present in only a small proportion of IBD patients.

A guide to prepare patients with inflammatory bowel diseases for anti-TNF-α therapy

Current therapy of moderate-to-severe inflammatory bowel disease (IBD) often involves the use of anti-tumor necrosis factor alpha (TNF-α) agents. Although very effective, theses biologics place the patient at increased risk for developing infections and lymphomas, the latter especially when in combination with thiopurines. Appropriate patient selection, counseling, and education are all important features for the successful use of anti-TNF-α therapy. A thorough history to rule-out contraindications of this therapy and emphasis on monitoring guidelines are important steps preceding administration of anti-TNF-α agents. This therapy should only be considered if a recent evaluation has established that the patient has active IBD. In addition, it is important to exclude disease mimickers. Anti-TNF-α agents have been considered to present a globally favorable benefit/risk ratio. However, it is important that in routine practice, initiation of anti-TNF-α therapy be carefully discussed with the patient, extensively explaining the potential benefits and risks of such treatment. Prior to starting anti-TNF-α therapy, the patients need to be screened for latent tuberculosis, hepatitis B virus infection, and (usually) hepatitis C virus and HIV infection. Vaccination schedules of IBD patients should be evaluated and updated prior to the commencement of anti-TNF-α therapy. Ordinarily, immunization in adult patients with IBD should not deviate from recommended guidelines for the general population. With the exception of live vaccines, immunizations can be safely administered in patients with IBD, even those on immunosuppressants or biologics. The purpose of this review is providing an overview of appropriate steps to prepare patients with IBD for anti-TNF-α therapy.

Optimizing screening for tuberculosis and hepatitis B prior to starting tumor necrosis factor-α inhibitors in Crohn's disease

BACKGROUND AND AIMS

Treatment with tumor necrosis factor-α (TNF-α) inhibitors in patients with Crohn's disease (CD) is associated with potentially serious infections, including tuberculosis (TB) and hepatitis B virus (HBV). We assessed the cost-effectiveness of extensive TB screening and HBV screening prior to initiating TNF-α inhibitors in CD.

METHODS

We constructed two Markov models: (1) comparing tuberculin skin test (TST) combined with chest X-ray (conventional TB screening) versus TST and chest X-ray followed by the interferon-gamma release assay (extensive TB screening) in diagnosing TB; and (2) HBV screening versus no HBV screening. Our base-case included an adult CD patient starting with infliximab treatment. Input parameters were extracted from the literature. Direct medical costs were assessed and discounted following a third-party payer perspective. The main outcome was the incremental cost-effectiveness ratio (ICER). Sensitivity and Monte Carlo analyses were performed over wide ranges of probability and cost estimates.

RESULTS

At base-case, the ICERs of extensive screening and HBV screening were €64,340 and €75,760 respectively to gain one quality-adjusted life year. Sensitivity analyses concluded that extensive TB screening was a cost-effective strategy if the latent TB prevalence is more than 12 % or if the false positivity rate of TST is more than 20 %. HBV screening became cost-effective if HBV reactivation or HBV-related mortality is higher than 37 and 62 %, respectively.

CONCLUSIONS

Extensive TB screening and HBV screening are not cost-effective compared with conventional TB screening and no HBV screening, respectively. However, when targeted at high-risk patient groups, these screening strategies are likely to become cost-effective.

Treatment of anemia in inflammatory bowel disease--systematic review and meta-analysis

Background

Anemia is considered the most common systemic complication of inflammatory bowel disease (IBD). We aimed to provide all available evidence regarding the safety and efficacy of therapy existing today to correct anemia in IBD.

Methods

Systematic review and meta-analysis of randomized controlled trials that compared any treatment for anemia in patients with IBD. We searched electronic databases, conference proceedings and clinical trials registries. Two reviewers independently extracted data from included trials. The primary outcome was the effect of treatment for anemia in IBD on the hemoglobin (Hb) response, defined as rate of patients who achieved an increase of 2 g/dl in Hb concentration at the end of the follow-up. Secondary outcomes included disease severity scores, iron indices, Hb levels, inflammatory markers, adverse effects, and mortality. Dichotomous data were analysed by calculating the relative risk (RR) for each trial with the uncertainty in each result being expressed using 95% confidence intervals (CI). A fixed effect model was used, except in the event of significant heterogeneity between the trials (P<0.10, I²>40%), in which we used a random effects model.

Results

Nine trials fulfilled the inclusion criteria, to a total of 973 patients. We were able to perform meta-analysis for intravenous (IV) versus oral iron and for ESAs versus placebo. IV iron was associated with a higher rate of achieving Hb response in comparison to oral iron; RR 1.25 (95% CI 1.04–1.51, I² = 2%, 4 trials), CRP levels and disease activity indexes were not significantly affected by IV iron. IV iron was associated with a decrease in adverse events that required discontinuation of intervention and without an increase in serious adverse.

Discussion

Treatment for anemia in IBD should include IV iron and not oral iron replacement, due to improved Hb response, no added toxicity and no negative effect on disease activity.

Diagnosis and therapeutic management of extra-intestinal manifestations of inflammatory bowel disease

Extra-intestinal manifestations (EIMs) are reported frequently in patients with inflammatory bowel disease (IBD) and may be diagnosed before, concurrently or after the diagnosis of IBD. EIMs in IBD may be classified based on their association with IBD disease activity. The first group has a direct relationship with the activity of the bowel disease and includes pauciarticular arthritis, oral aphthous ulcers, erythema nodosum and episcleritis. The second group of EIMs appears to follow an independent course from the underlying bowel disease activity and include ankylosing spondylitis and uveitis. The third group includes EIMs that may or may not be related to intestinal inflammation, such as pyoderma gangrenosum and probably primary sclerosing cholangitis (PSC). Genetic susceptibility, aberrant self-recognition and immunopathogenic autoantibodies against organ-specific cellular antigens shared by the colon and extra-colonic organs may contribute to the pathogenesis and development of these EIMs. The use of biological agents in the IBD armamentarium has expanded the treatment options for some of the disabling EIMs and these agents form the cornerstone in managing most of the disabling EIMs. PSC is one of the most common hepatobiliary manifestations associated with IBD in which no clear treatment options exist other than endoscopic therapy and liver transplantation. Future research targeting the pathogenesis, early diagnosis and treatment of these EIMs is required.

Diagnosis and therapeutic management of extra-intestinal manifestations of inflammatory bowel disease

Extra-intestinal manifestations (EIMs) are reported frequently in patients with inflammatory bowel disease (IBD) and may be diagnosed before, concurrently or after the diagnosis of IBD. EIMs in IBD may be classified based on their association with IBD disease activity. The first group has a direct relationship with the activity of the bowel disease and includes pauciarticular arthritis, oral aphthous ulcers, erythema nodosum and episcleritis. The second group of EIMs appears to follow an independent course from the underlying bowel disease activity and include ankylosing spondylitis and uveitis. The third group includes EIMs that may or may not be related to intestinal inflammation, such as pyoderma gangrenosum and probably primary sclerosing cholangitis (PSC). Genetic susceptibility, aberrant self-recognition and immunopathogenic autoantibodies against organ-specific cellular antigens shared by the colon and extra-colonic organs may contribute to the pathogenesis and development of these EIMs. The use of biological agents in the IBD armamentarium has expanded the treatment options for some of the disabling EIMs and these agents form the cornerstone in managing most of the disabling EIMs. PSC is one of the most common hepatobiliary manifestations associated with IBD in which no clear treatment options exist other than endoscopic therapy and liver transplantation. Future research targeting the pathogenesis, early diagnosis and treatment of these EIMs is required.

The influence of anti-TNF therapy on the course of chronic hepatitis C virus infection in patients with inflammatory bowel disease

BACKGROUND

The immunosuppressive potential of anti-tumor necrosis factor (TNF) in exacerbating chronic hepatitis C virus (HCV) infection has been a major concern. We aim to critically analyze the impact of anti-TNF on the course of chronic HCV infection in patients with concurrent inflammatory bowel disease (IBD) and HCV infection.

MATERIALS AND METHODS

Patients with diagnosis of IBD and HCV were identified retrospectively through the University of Pennsylvania Health System electronic database. Data assessed included demographics, duration of IBD and HCV infection, HCV RNA levels, HCV genotype, liver histology, hepatic biochemical tests (HBT) and IBD disease activity index.

RESULTS

A total of 4,274 IBD and 3,523 HCV patients were identified from 10/1998 to 05/2010. Thirty-seven patients had concurrent HCV infection and IBD, of which 23 patients were eligible (61 % CD; 39 % UC). Five patients (22 %) received anti-TNF therapy (infliximab). Two patients received pegylated interferon and ribavirin (both were non-responders). Overall, three patients had clinical remission and one patient had clinical response to infliximab. When compared to baseline, one patient had HBT improvement, three patients remained stable and one patient had HBT elevation, which was likely due to progressive liver disease in view of HIV co-infection.

CONCLUSION

This represents the first critical analysis assessing the impact of anti-TNF therapy on the course of chronic HCV in IBD patients. Concurrent HCV infection in IBD patients is uncommon. Treatment of IBD with infliximab in HCV patients did not result in flares in hepatic biochemical tests while there was an improvement in the IBD disease activity score.

Immunogenecity of hepatitis A and B vaccination in pediatric patients with inflammatory bowel disease

OBJECTIVES

Aim of the study was to evaluate the response to hepatitis A and B vaccination in pediatric patients with inflammatory bowel disease (IBD).

METHODS

A total of 47 patients with IBD (25 ulcerative colitis, 14 Crohn's disease, and 8 indeterminate colitis) ages 3 to 17 years were compared with 50 healthy age- and sex-matched controls. Screening for hepatitis A and B serology was carried out before vaccination. Susceptible cases received 20 mg of recombinant DNA vaccine for hepatitis B (0, 1, and 6 months)and 720 milliELISA units of inactivated hepatitis A virus vaccine (HAV) (0 and 6 months). Postvaccination serologic evaluation was performed 1 month after the last dose of primary vaccination, 1 month after the booster dose, and once every year during follow-up.

RESULTS

A total of 23 patients and 35 controls received HAV and protective anti-HAV antibodies were developed in all of the patients and controls (P =1.00). Forty-seven patients and 50 controls received hepatitis B vaccine and 70.2% of the patients versus 90% of the controls achieved seroprotection(anti-HBs titers 10 mIU/mL) 1 month after primary vaccination (95% confidence interval 0.71–0.87, P = 0.02). The overall seroprotection rates were 96% in controls and 85.1% in patients after the whole hepatitis B vaccination series (95% confidence interval 0.83–0.95, P = 0.08). No significant reduction was observed in antibody response among patients and controls during the follow-up period.

CONCLUSIONS

The rate of seroconversion to the hepatitis B vaccine was lower in pediatric patients with IBD than in healthy controls and hepatitis A vaccine was highly immunogenic among patients with IBD.

Hepatitis B and inflammatory bowel disease: Role of antiviral prophylaxis

Hepatitis B virus (HBV) is a very common infection worldwide. Its reactivation in patients receiving immunosuppression has been widely described as being associated with significant morbidity and mortality unless anti-viral prophylaxis is administered. Treatment in inflammatory bowel disease (IBD) patients has changed in recent years and immunosuppression and biological therapies are now used more frequently than before. Although current studies have reported an incidence of hepatitis B in inflammatory bowel disease patients similar to that in the general population, associated liver damage remains an important concern in this setting. Liver dysfunction may manifest in several ways, from a subtle change in serum aminotransferase levels to fulminant liver failure and death. Patients undergoing double immunosuppression are at a higher risk, and reactivation usually occurs after more than one year of treatment. As preventive measures, all IBD patients should be screened for HBV markers at diagnosis and those who are positive for the hepatitis B surface antigen should receive antiviral prophylaxis before undergoing immunosuppression in order to avoid HBV reactivation. Tenofovir/entecavir are preferred to lamivudine as nucleos(t)ide analogues due to their better resistance profile. In patients with occult or resolved HBV, viral reactivation does not appear to be a relevant issue and regular DNA determination is recommended during immunosuppression therapy. Consensus guidelines on this topic have been published in recent years. The prevention and management of HBV infection in IBD patients is addressed in this review in order to address practical recommendations

Effect of immunosuppressive therapy on patients with inflammatory bowel diseases and hepatitis B or C virus infection

Viral hepatitis reactivation has been widely reported in patients undergoing immunosuppressive therapy; however, few data are available about the risk of HBV and HCV reactivation in patients with inflammatory bowel disease, receiving immunosuppressive drugs. The aim of our study was to assess the prevalence of HBV and HCV infection in a consecutive series of patients with inflammatory bowel disease and to value the effects of immunosuppressive therapy during the course of the infection. Retrospective observational multicenter study included all consecutive patients with inflammatory bowel disease who have attended seven Italian tertiary referral hospitals in the last decade. A total of 5096 patients were consecutively included: 2485 Crohn's disease and 2611 Ulcerative Colitis. 30.5% and 29.7% of the patients were investigated for HBV and HCV infection. A total of 30 HBsAg positive, 17 isolated anti-HBc and 60 anti-HCV-positive patients were identified. In all, 20 patients with HBV or HCV infection received immunosuppressive therapy (six HBsAg+; four isolated anti-HBc+ and 10 anti-HCV+). One of six patients showed HBsAg+ and one of four isolated anti-HBc+ experienced reactivation of hepatitis. Two of six HBsAg patients received prophylactic therapy with lamivudine. Only one of 10 anti-HCV+ patients showed mild increase in viral load and ALT elevation. Screening procedures for HBV and HCV infection at diagnosis have been underused in patients with inflammatory bowel disease. We confirm the role of immunosuppressive therapy in HBV reactivation, but the impact on clinical course seems to be less relevant than previous reported.

Prevalence and natural history of hepatitis B and C infections in a large population of IBD patients treated with anti-tumor necrosis factor-α agents

BACKGROUND

The prevalence rates of hepatitis B virus (HBV) and hepatitis C virus (HCV) in patients with inflammatory bowel disease (IBD) have been reported to be higher than rates of infection among the general population. Although several cases of HBV infection reactivation in IBD patients treated with anti-TNF-α agents have been described, no evidence exists that anti-TNF-α therapy exacerbates the course of HCV. The aims of this study were to assess the prevalence of HBV and HCV and the rate of HBV vaccination in a population of IBD patients; and to investigate the long-term effects of anti-TNF-α therapy in the subgroup with HBV or HCV infections.

METHODS

301 patients were studied. Prior to the initiation of anti-TNF-α therapy, serum samples were tested for HBsAg and anti-HBc, anti-HBs and anti-HCV antibodies. During the follow-up, HBsAg and anti-HBc positive patients underwent periodic blood testing for viral markers, HBV-DNA and liver function; anti-HCV positive patients were assessed for liver function and HCV-RNA.

RESULTS

One patient was HBsAg positive (0.3%), and 22 (7.3%) tested positive for anti-HBc. Seventy-two patients (23.9%) had been vaccinated for HBV. Four patients tested positive for anti-HCV (1.3%). During anti-TNF-α therapy, none of the patients experienced HBV or HCV reactivation.

CONCLUSIONS

HBV and HCV infection rates were similar to infection rates among the general population. Less than one quarter of the patients had been vaccinated against HBV. Anti-TNF-α agents appear to be safe for patients with HBV infection; more data are needed for patients with HCV infection.

Current knowledge and systematic review of viruses associated with Crohn's disease

The aetiology of Crohn's disease (CD) is currently unknown. A viral trigger was proposed more than 40 years ago and has been the focus of many investigations. We summarised the current literature surrounding the association between viruses and CD and conducted a systematic review of all studies investigating this association quantitatively. Studies were identified by searching for 13 specific virus names or the general term 'virus' and 'Crohn's disease' in search engines PubMed and OVID. A total of 1315 studies were identified, of which 78 studies had a laboratory result. Of the 78, 46 case-control studies met all the inclusion criteria for forest plot analysis. The most common viruses studied were EBV, CMV and measles virus (MV). Forest plot analysis for each virus was carried out (fitted using random effects) and identified evidence of an association between CD and CMV (risk ratio [RR] 1.602, 95% confidence interval [CI] 1.069 to 2.400) with some suggestion that EBV may also be associated with CD (RR 1.366, 95% CI 0.996 to 1.873). However, there was evidence of large heterogeneity in the results from the identified studies for EBV. There was little evidence of an association with CD for MV, human herpes virus 6, human herpes virus 8, human simplex virus, varicella-zoster virus, mumps virus, Rubella virus, rotavirus, norovirus and adenovirus. There is still some question around whether CD is associated with the presence of a currently known virus.

Liver disorders in inflammatory bowel disease

Disorders of the hepatobiliary system are relatively common extraintestinal manifestations of inflammatory bowel disease (IBD). These disorders are sometimes due to a shared pathogenesis with IBD as seen in primary sclerosing cholangitis (PSC) and small-duct primary sclerosing cholangitis (small-duct PSC). There are also hepatobiliary manifestations such as cholelithiasis and portal vein thrombosis that occur due to the effects of chronic inflammation and the severity of bowel disease. Lastly, medications used in IBD such as sulfasalazine, thiopurines, and methotrexate can adversely affect the liver. It is important to be cognizant of these disorders as some do have serious long-term consequences. The management of these disorders often requires the expertise of multidisciplinary teams to achieve the best outcomes.

An Australian audit of vaccination status in children and adolescents with inflammatory bowel disease

BACKGROUND

Children and adolescents with inflammatory bowel disease (IBD) are at increased risk of vaccine preventable diseases (VPD). This includes invasive pneumococcal disease and influenza. The primary aim of this study was to describe compliance with current Australian guidelines for vaccination of children and adolescents diagnosed with IBD. A secondary aim was to review the serological screening for VPD.

METHODS

A random sample of patients (0-18 years at diagnosis), were selected from the Victoria Australia state based Pediatric Inflammatory Bowel Disease Register. A multi-faceted retrospective review of immunization status was undertaken, with hospital records audited, a telephone interview survey conducted with consenting parents and the vaccination history was checked against the primary care physician and Australian Childhood Immunization Register (ACIR) records. The routine primary childhood vaccinations and administration of the recommended additional influenza and pneumococcal vaccines was clarified.

RESULTS

This 2007 audit reviewed the immunization status of 101 individuals on the Victorian Pediatric IBD database. Median age at diagnosis was 12.1 years, 50% were on active immunosuppressive therapy. 90% (38/42) [95% confidence intervals (CI) 77%; 97%] with complete immunization information were up-to-date with routine primary immunizations. Only 5% (5/101) [95% CI 2%; 11%] received a recommended pneumococcal vaccine booster and 10% (10/101) [95% CI 5%; 17%] had evidence of having ever received a seasonal influenza vaccine. Those living in rural Victoria (p = 0.005) and younger at the age of diagnosis (p = 0.002) were more likely to have ever received an influenza vaccine Serological testing, reviewing historical protection from VPD, identified 18% (17/94) with evidence of at least one serology sample.

CONCLUSION

This study highlights poor compliance in IBD patients for additional recommended vaccines. A multi-faceted approach is required to maximize protection from VPD in this vulnerable special risk population.

Comorbidity in inflammatory bowel disease

Patients with inflammatory bowel disease (IBD) can be affected by other unrelated diseases. These are called comorbid conditions, and can include any secondary health problem that affects a person suffering from a primary or main disease, and which is neither linked physiopathologically to the primary condition, nor is it due to the treatments used for the primary condition or to its long-term anatomical or physiological consequences. Different comorbid conditions, as well as their influence on IBD, are discussed.

Optimizing immunization in pediatric special risk groups

This article analyzes the current recommended practices and evidence in the immunization of pediatric 'special risk groups'. Special risk group patients are at higher risk of vaccine-preventable diseases and hence require additional strategies to maximize protection against these diseases. The special risk groups include those with an underlying chronic disease, some of whom are on immunosuppressive therapy to treat that condition. The article uses four special risk groups (acute lymphoblastic leukemia; preterm birth; juvenile idiopathic arthritis; and inflammatory bowel disease), to highlight the management considerations and potential vaccination strategies. The risks, benefits and timing of vaccination in the setting of immunosuppression require detailed discussion with treating clinicians, in particular the use of live-attenuated vaccines. The immunogenicity of vaccines in these special risk groups helps provide the evidence base for their immunization guidelines. Protection can include 'cocooning' (i.e., ensuring appropriate immunizations within the immediate family; e.g., varicella, influenza and pertussis vaccination). Improving timeliness and minimizing missed opportunities to vaccinate individuals with these special risk conditions will also optimize protection from vaccine-preventable diseases.

Review article: prevention and management of hepatitis B and C infection in patients with inflammatory bowel disease

BACKGROUND

Viral hepatitis is a very common infection.

AIM

To review the prevention and management of hepatitis B virus (HBV) and hepatitis C virus (HCV) infection in inflammatory bowel disease (IBD).

METHODS

Bibliographical searches were performed in MEDLINE up to September 2010.

RESULTS

The prevalence of both HBV and HCV infection in IBD patients is now similar to that of the general population. All IBD patients should be screened for HBV markers at diagnosis. Liver dysfunction in IBD patients treated with immunosuppressants is more frequent and severe in HBV than in HCV carriers and is associated with combined immunosuppression. Inpatients receiving anti-TNF drugs, HBV reactivation is common unless anti-viral prophylaxis is administered. HBsAg-positive patients should receive anti-viral prophylaxis before starting immunosuppressants. As interferon might worsen underlying IBD, nucleoside ⁄ nucleotide analogues are preferred for anti-viral prophylaxis in patients with HBV (tenofovir ⁄ entecavir are preferred to lamivudine). IBD patients should be vaccinated against HBV at diagnosis. The response rate to HBV vaccination is low, mainly in those receiving anti-TNF therapy. The serological response to HBV vaccine should be confirmed, and patients with an inadequate response should receive a second full series of vaccine. Peginterferon (ribavirin) for HCV infection is as effective and safe as in non-IBD patients.

CONCLUSIONS

The present manuscript poses a series of questions on the prevention and management of HBV/HCV infection in IBD, and attempts to answer them using scientific evidence in order to provide practical conclusions for the clinician.

Hepatitis B virus infection and immunosuppressive therapy in patients with inflammatory bowel disease

Hepatitis B reactivation has been widely reported in patients undergoing immunosuppressive therapy in oncohaematological and transplant settings, with a high frequency of hepatic failure. This topic has received growing scientific interest and several studies reported the preventive effect of antiviral agents on hepatitis B reactivation during immunosuppression therapy. Routine prophylaxis is therefore recommended and specific recommendations were elaborated by AASLD, EASL and AISF. On the contrary, few data are available on the risk of HBV reactivation in patients with inflammatory bowel disease (IBD) receiving immunosuppressive therapy, and major questions regarding the optimal management (screening, prophylaxis, therapy, monitoring) of IBD patients with HBV infection remain to be addressed. The aim of this paper is to provide a systematic review of the literature to underline the main aspects of HBV infection and reactivation in patients affected by IBD treated with conventional or biological immunosuppressive drugs.

Inflammatory bowel disease and hepatitis B and C in Western Balkans: a referral centre study and review of the literature

BACKGROUND AND AIMS

There is limited data on IBD patients diagnosed with viral hepatitis B and C. The aim of the study was to assess the prevalence of chronic HBV or HCV infection in IBD patients followed by our centre and to describe and review the course of bowel and liver disease during therapy.

METHODS

Single centre retrospective study on 482 consecutive IBD patients. Laboratory investigation for HBV and HCV was performed with routine methods. Treatment protocols for HBV included IFNa and nucleot(s)ide administration and for HCV combined IFNa and ribavirin.

RESULTS

We diagnosed 15 patients (15/482, 3.1%) with HBV or HCV. Of these, 11 were HBV (11/482, 2.3%) and 4 were HCV (4/482, 0.8%). Nine of eleven HBV patients received antiviral therapy (8 lamivudine, 1 IFNa). Five lamivudine patients were switched to tenofovir and in another one adefovir dipivoxil were added. Bowel disease was in remission in ten of the eleven HBV patients. One patient was diagnosed with carcinoid tumor. Two HCV patients received IFNa that was well tolerated. One HCV patient denied therapy and one died from hepatocellular cancer. Of the seven patients on azathioprine only one achieved sustained response. Four patients on Infliximab achieved bowel disease remission but experienced biochemical or virological flare.

CONCLUSIONS

This study demonstrates that prevalence of HBV and HCV infection in a large IBD cohort from Western Balkans is compared to that of the background population. IBD patients under immunosuppressants may apparently be treated with safety if preventive antiviral treatment is administered.

A decade of infliximab: The Austrian evidence based consensus on the safe use of infliximab in inflammatory bowel disease

Infliximab (IFX) has tremendously enriched the therapy of inflammatory bowel diseases (IBD) and other immune mediated diseases. Although the efficacy of IFX was undoubtedly proven during the last decade numerous publications have also caused various safety concerns. To summarize the immense information concerning adverse events and safety issues the Austrian Society of Gastroenterology and Hepatology launched this evidence based consensus on the safe use of IFX which covers the following topics: infusion reactions and immunogenicity, skin reactions, opportunistic infections (including tuberculosis), non-opportunistic infections (bacterial and viral), vaccination, neurological complications, hepatotoxicity, congestive heart failure, haematological side effects, intestinal strictures, stenosis and bowel obstruction (SSO), concomitant medication, malignancy and lymphoma, IFX in the elderly and the young, mortality, fertility, pregnancy and breast feeding. To make the vast amount of information practicable for routine application the consensus was finally condensed into a checklist for a safe use of IFX which consists of two parts: issues to be addressed prior to anti-TNF therapy and issues to be addressed during maintenance. Both parts are further divided into obligatory and facultative items.