title: Persistence of hepatitis B vaccine immunity in hemodialysis patients.
abstract: Although the efficacy of hepatitis B vaccines in patients undergoing chronic hemodialysis (HD) treatment has been documented, the persistence of immunity in this population remains largely unknown. In this study we evaluated the persistence of hepatitis B vaccine immunity in HD patients. We followed 37 hepatitis B vaccinated HD patients (following a four-dose vaccination schedule of 40 mug injections intramuscularly in the deltoid muscle at 0, 1, 2, and 6 months) for up to one year to evaluate the persistence of immunity (as indicated by serum levels of hepatitis B surface antibody (anti-HBs) equal to or higher than 10 IU/L). One year after vaccination, 18.9% of patients had lost their anti-HBs (transient responders), while 81.1% still had detectable antibodies in the serum (persistent responders). From 81.1% of persistent responders 11.5% and 88.5% were weak and high responders, respectively. There was no significant difference between persistent and transient responders regarding age, sex, or nutritional factors. We did not find any factors that related to maintaining protective levels of anti-HBs in HD patients. It seems that an antibody titer above 100 IU/L following vaccination is necessary in order to maintain that level of antibody one year later.
authors.affiliation: Clinical Research Department, Pasteur Institute of Iran, Tehran, Iran. iiccom@iiccom.com
authors.forename: Amitis
authors.initials: A
authors.lastname: Ramezani
authors.forename: Ali Akbar
authors.initials: AA
authors.lastname: Velayati
authors.forename: Ali
authors.initials: A
authors.lastname: Eslamifar
authors.forename: Mohammad
authors.initials: M
authors.lastname: Banifazl
authors.forename: Farrokhlagha
authors.initials: F
authors.lastname: Ahmadi
authors.forename: Sima
authors.initials: S
authors.lastname: Maziar
authors.forename: Effat
authors.initials: E
authors.lastname: Razeghi
authors.forename: Ebrahim
authors.initials: E
authors.lastname: Kalantar
authors.forename: Aref
authors.initials: A
authors.lastname: Amirkhani
authors.forename: Arezoo
authors.initials: A
authors.lastname: Aghakhani
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D006509:Hepatitis B / Q000276:immunology; D006510:Hepatitis B Antibodies / Q000097:blood*; D017325:Hepatitis B Vaccines / Q000276:immunology*; D006801:Humans; D007110:Immunity, Active; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D006435:Renal Dialysis; D013997:Time Factors; D014611:Vaccination
chemical_list: D006510:Hepatitis B Antibodies; D017325:Hepatitis B Vaccines