Abstract:The response rate and HBsAG antibody concentrations were examined after hepatitis B vaccination in 78 hemodialysis patients aged between 29 and 79 years. The values were related to age, duration of hemodialysis, body weight, creatinine, urea nitrogen, serum concentrations of β2-microglobulin and soluble interleukin-2 receptor (IL-2R). Patients with low anti-HBsAG antibody concentrations (10–100 mU/ml) had significantly higher IL-2R serum concentrations than those with high anti-HBsAG antibody concen… Show more
“…The results too are striking: of a total of 7,790 patients, an 'efficacious' seroconversion (>I0 U/m l) was obtained in 4,626 cases, i.e., 57.9%, in keeping with other authors' reports [3,12,13,34,45]. Unfortunately, we did not ask for information on the age of the responders, and so we cannot confirm whether the antibody response depends, at least partially, on this pa rameter [10,38], even if a recent paper by Walz [45] would tend to rule this out.…”
supporting
confidence: 87%
“…However, the true key to success in the fight seems to be the anti-HBV vaccine. After results proving more than 95% efficacy in the nonuremic population [10,47], the use of this method is spreading, even if its high cost (about 150 US S per cycle); the possible lack of response in subjects with elevated levels of interleukin-2 receptor [45], or even the appearance of H B V mutants [5], lead to consider that it may be wiser to use the vaccine in the high-risk sectors of the population, where the results are nevertheless posi tive [11,12,34,39], The uremic patient, whether undergoing dialysis or not, is certainly subject to risk, and in this field, in fact, the use of the vaccine is steadily increasing. For example, in the USA, in 1982, only 17% of centers [39] made use of this vaccine, but just 1 year later, 71% of centers provided vaccination for their dialysis staff and 43% for their patients.…”
Because of the great problem of viral hepatitis in hemodialysis patients, the Italian Society of Nephrology decided to perform a national epidemiologic survey. We contacted 467 nephrological centers by a questionnaire which let us have information on 25,746 uremic patients: 18,338 on HD, 2,250 on PD and 5,176 with kidney transplant, respectively 78.5% of the total Italian dialysed patients and 91.4% of the total transplanted patients. Statistical analyses were performed. HBV infections occur in 7.8% of the patients (2,008 cases) but considering that 485 cases became spontaneously negative, the true overall incidence of chronic carriers falls to 4.9%. The main causes of the infection are reported as transfusions (64.3%) and dialysis environment (12%). The vaccination program performed by 93.2% of the centers, obtained an efficacious seroconversion in 4,626 of 7,790 cases vaccinated: the vaccine currently most utilized is the recombinant type administered by means of 3 versus 4 boosters. In the 2nd part of the survey, we report information concerning the presence of nephropaties associated with HBV infections in nonuremic patients (208 cases). We present and discuss the clinical picture of the nephropaties, the hystologic bioptic pattern and the prognosis of the kidney pathology.
“…The results too are striking: of a total of 7,790 patients, an 'efficacious' seroconversion (>I0 U/m l) was obtained in 4,626 cases, i.e., 57.9%, in keeping with other authors' reports [3,12,13,34,45]. Unfortunately, we did not ask for information on the age of the responders, and so we cannot confirm whether the antibody response depends, at least partially, on this pa rameter [10,38], even if a recent paper by Walz [45] would tend to rule this out.…”
supporting
confidence: 87%
“…However, the true key to success in the fight seems to be the anti-HBV vaccine. After results proving more than 95% efficacy in the nonuremic population [10,47], the use of this method is spreading, even if its high cost (about 150 US S per cycle); the possible lack of response in subjects with elevated levels of interleukin-2 receptor [45], or even the appearance of H B V mutants [5], lead to consider that it may be wiser to use the vaccine in the high-risk sectors of the population, where the results are nevertheless posi tive [11,12,34,39], The uremic patient, whether undergoing dialysis or not, is certainly subject to risk, and in this field, in fact, the use of the vaccine is steadily increasing. For example, in the USA, in 1982, only 17% of centers [39] made use of this vaccine, but just 1 year later, 71% of centers provided vaccination for their dialysis staff and 43% for their patients.…”
Because of the great problem of viral hepatitis in hemodialysis patients, the Italian Society of Nephrology decided to perform a national epidemiologic survey. We contacted 467 nephrological centers by a questionnaire which let us have information on 25,746 uremic patients: 18,338 on HD, 2,250 on PD and 5,176 with kidney transplant, respectively 78.5% of the total Italian dialysed patients and 91.4% of the total transplanted patients. Statistical analyses were performed. HBV infections occur in 7.8% of the patients (2,008 cases) but considering that 485 cases became spontaneously negative, the true overall incidence of chronic carriers falls to 4.9%. The main causes of the infection are reported as transfusions (64.3%) and dialysis environment (12%). The vaccination program performed by 93.2% of the centers, obtained an efficacious seroconversion in 4,626 of 7,790 cases vaccinated: the vaccine currently most utilized is the recombinant type administered by means of 3 versus 4 boosters. In the 2nd part of the survey, we report information concerning the presence of nephropaties associated with HBV infections in nonuremic patients (208 cases). We present and discuss the clinical picture of the nephropaties, the hystologic bioptic pattern and the prognosis of the kidney pathology.
“…sex, length of time on dialysis, underlying pathologic condition, type of vaccine, dosages, schedules [16][17][18][19][20]. In our study, no data on pathologic conditions were col lected; the two vaccinated groups were similar in most relevant characteristics but not in length of time on dialy sis.…”
In 1985-1986, 634 adult dialysis patients were tested prior to hepatitis B vaccination, representing 40% of the total patients in Latium, an Italian region. HBsAg and anti-HBs prevalences were 7.1 and 36.0%, respectively. Merck, Sharp & Dohme (MSD) and Pasteur plasma-derived vaccines were randomly allocated to the 44 dialysis units. An anti-HBs response greater than or equal to 10 IU/l was elicited in 58.5% of 236 subjects tested at 6 months, 63.4% MSD and 52.4% Pasteur (p n.s.). The relatively low response to the vaccine in this high-risk group stresses the need to improve the efficacy of the vaccination and to maintain policies of environmental control.
“…According to our own and others' experience [2], antiHBs-negative patients, after intensive vaccination proto cols, maintained significant anti-HBs levels with yearly booster doses. A different evolution of naturally acquired anti-HBs levels is shown in our patients: most of them (15 of 22) maintained protective antibody concentration throughout follow-up, and the other 7, after a single booster dose of vaccine, showed a proportion of seroconversion similar to that observed after the full schedule in anti-HBsnegative patients.…”
Long-term behavior of naturally acquired anti-HBs antibody was tested every 6 months for 3 years in 22 dialysis patients. Fifteen of them maintained protective levels throughout follow-up (102 and 85.5 mUI/ml at the beginning and the end, respectively). Seven of them became anti-HBs and were submitted to a 40-μg booster injection of hepatitis B vaccine. Seroconversion was observed in 6 of 7 patients (85.7%) with a mean anti-HBs titer of 90.4 and 47.3 mUI/ml after 3 and 6 months, respectively. Protective anti-HBs level may be maintained longer in patients with natural immunity than in HBsAg-negative vaccinated subjects. Effectiveness of a reduced vaccination protocol in patients who have lost their natural immunization should be confirmed with further studies.
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