Vacinação contra Hepatite B em indivíduos renais crônicos em tratamento hemodialítico / Hepatitis B vaccination in chronic renal failure patients on hemodialysis / Vacunación contra Hepatitis B en individuos con insuficiencia renal crónica en hemodiálisis

Indivíduos em tratamento hemodialítico apresentam elevado risco de infecção pelo Vírus da Hepatite B, sendo, portanto, uma população alvo para vacinação contra Hepatite B. Este estudo de coorte retrospectivo objetivou avaliar o monitoramento da vacina contra Hepatite B em indivíduos que iniciaram hemodiálise em 2005 e permaneceram em seguimento por até quatro anos, em Ribeirão Preto-SP. A população foi constituída por 102 indivíduos. Somente 39,2% possuíam registro em prontuário de vacinação prévia contra Hepatite B, e 35,3% receberam o esquema vacinal completo. A maioria recebeu esquema de três doses (40 mcg) e 72,2% desenvolveram títulos protetores de anti-HBs. Dos 62 indivíduos sem registro de vacinação prévia em prontuário, 22,6% permaneceram em tratamento hemodialítico por mais de 42 meses. Os achados deste estudo evidenciam a necessidade urgente de mais esforços de gestores públicos e profissionais de saúde na vigilância da vacinação contra Hepatite B em centros de hemodiálise da região.

Individuals on hemodialysis are at high risk of infection by Hepatitis B Virus and are, therefore, a target population for vaccination against Hepatitis B. This retrospective cohort study aimed to evaluate Hepatitis B vaccination monitoring of patients who started hemodialysis in 2005 and continued in follow-up for up to four years in Ribeirão Preto, São Paulo State. Of the population of 102 individuals, only 39.2% were on record as previously vaccinated against Hepatitis B, while 35.3% received the full vaccination schedule. The majority received a three-dose regimen (40 mcg), and 72.2% developed protective titers of anti-HBs. Of the 62 individuals with no record of previous vaccination, 22.6% remained on hemodialysis for more than 42 months. Findings highlight the urgent need for more effort by policy managers and health professionals in surveillance of Hepatitis B vaccination at hemodialysis centers in the region.

Individuos sometidos a hemodiálisis tienen un alto riesgo de infección por el Virus de Hepatitis B, siendo así una población objetivo para vacunación contra Hepatitis B. Este estudio de cohorte retrospectivo objetivó evaluar el monitoreo de la vacuna contra Hepatitis B en individuos que iniciaron hemodiálisis en 2005 y se mantuvieron en seguimiento hasta cuatro años en la ciudad de Ribeirão Preto, São Paulo – Brasil. Población fue constituida por 102 individuos. Sólo 39,2% tenían registro en prontuario de vacunación previa contra hepatitis B, y 35,3% recibieron vacunación completa. La mayoría recibió tres dosis (40 mcg) y 72,2% desarrollaron títulos protectores de anti-HBs. De los 62 individuos sin registro en prontuario de vacunación previa, 22,6% se mantuvieron en hemodiálisis por más de 42 meses. Hallazgos resaltan la urgente necesidad de más esfuerzos de gestores públicos y profesionales de salud en la vigilancia de vacunación contra Hepatitis B en centros de hemodiálisis de la región.

Influência da infecção pregressa pelo vírus da hepatite B na fibrose hepática em portadores de hepatite C crônica: avaliação retrospectiva de uma série de casos / Influence of previous hepatitis B virus infection on liver fibrosis in patients with chronic hepatitis C: a retrospective case series evaluation

INTRODUCÃO: A hepatite C é uma das principais causas de doença hepática em todo mundo. Apresenta um curso evolutivo dinâmico e influenciável por diversos co-fatores. Dentre eles, a infecção pregressa pelo vírus B (anti-HBcAg [+] e HBsAg [-]) tem se associado a pior prognóstico histológico e terapêutico. Este trabalho teve como objetivo analisar a associação entre a infecção pregressa pelo vírus B e fibrose hepática em portadores de hepatite C crônica, de maneira independente. MÉTODOS: Foram revistos retrospectivamente prontuários médicos de pacientes infectados cronicamente pelo vírus C, atendidos consecutivamente durante um ano no ambulatório de Doenças Infecciosas e Parasitárias - HC FMUSP, quanto aos dados epidemiológicos, clínicos, laboratoriais e histológicos. A análise de independência do impacto da infecção pregressa pelo vírus B foi realizada através de modelo estatístico de regressão logística multivariado, considerando a detecção do anti-HBcAg como variável de exposição, sendo o desfecho a alteração estrutural histopatológica graus 3 e 4 (septos com formação de nódulos e cirrose).0 RESULTADOS: 145 indivíduos foram avaliados pelo estudo, 47.2 por cento com anti-HBcAg (+). O fator de risco mais comumente relatado foi transfusão de sangue e hemoderivados (35,9 por cento). Embora necrose em saca-bocado tenha sido encontrada com maior frequência no grupo de infecção pregressa, a sorologia anti-HBcAg (+) não se associou à fibrose hepática avançada. CONCLUSÕES: A infecção pregressa pelo vírus B não parece acentuar a lesão estrutural desencadeada pela hepatite C crônica, após controle estatístico para outros co-fatores sabidamente capazes de influenciar a história natural desta infecção.

INTRODUCTION: Hepatitis C is a major cause of liver disease worldwide. Its evolutionary course is dynamics and may be influenced by several cofactors. Among them, previous hepatitis B virus infection (anti-HBcAg [+] and HBsAg [-]) has been associated with worse histological and therapeutic prognosis. This study had the objective of independently assessing the relationship between previous hepatitis B infection and liver fibrosis in patients with chronic hepatitis C. METHODS: The medical records of patients chronically infected with the hepatitis C virus who had been seen consecutively during a one-year period at the infectious and parasitic diseases outpatient clinic of HC FMUSP were retrospectively reviewed in relation to epidemiological, clinical and histological data. Analysis on the independence of the previous hepatitis B infection was performed using the statistical model of multivariate logistic regression. Detection of anti-HBcAg was taken to be the independent variable. The outcome was taken to be grade 3 and 4 histopathological abnormality (septa with nodule formation and cirrhosis). RESULTS: 145 subjects were evaluated in this study. 47.2 percent of them were anti-HBcAg (+). The main risk factor for infection was blood and blood derivative transfusion (35.9 percent). Findings of anti-HBcAg (+) were not related to advanced liver fibrosis, although piecemeal necrosis has been found frequently in patients with this serological marker. CONCLUSIONS: Previous hepatitis B infection does not seem to increase the structural liver damage triggered by chronic hepatitis C virus infection, after statistical control for other co-factors capable to impact the natural history of this infection.

Hepatitis B and C seroprevalence in the Lebanese population

We aimed to evaluate exposure to hepatitis B and C viruses [HBV and HBC] and candidate risk factors among the Lebanese population. All individuals presenting to all laboratory units in the country over a 2-week period were asked for a 5-mL whole blood sample and answered a questionnaire addressing risk factors. For individuals under 15 years of age the mother was interviewed. In all, 2893 blood samples were examined. Refusal rate was 2.9%. Exposure to HBV antigen was 18.9%; 1.9% were carriers and acute hepatitis B point prevalence was 0.1%. Exposure to HCV antigen was 0.7%. Exposure to both HBc and HCV antibodies was 0.2%. HBc prevalence increased with age and was higher among men. Significant risk factors included blood transfusion, haemodialysis and gastrointestinal endoscopy

Evaluation of the routine hepatitis B immunization programme in palestine, 1996

The objectives of this study were to evaluate routine hepatitis B immunization in Palestine. Blood samples of 119 children [89 fully immunized and 30 non-immunized] were analysed. The protective antibody levels among immunized children were greater than the non-immunized children. Antibody levels among the immunized children were lower in the older age group [> 36 months], but no sex differences in antibody level were apparent. Thus, hepatitis B immunization had an excellent impact on preventing hepatitis B transmission [85% preventive]. The non-responders constituted 14.6% of the sample, which is higher than other studies