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Protective Immunity Against HAV Eventually Declines In Graft Recipients.(Brief Article)

Vaccine Weekly

| March 21, 2001 | COPYRIGHT 2001 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2001 MAR 21 - (NewsRx.com & NewsRx.net) --

by Sonia Nichols, staff medical writer -- Protective immunity developed after immunization with the hepatitis A vaccine gradually weakens in liver and kidney transplant recipients.

Within a few years of hepatitis A virus (HAV) vaccination, liver and kidney transplant patients will lose protective antibodies against the virus. Organ transplant recipients must often take immunosuppressive therapies after transplantation. Authors of a new study report these patients remain highly susceptible to new HAV infections as their protective antibody levels fall.

Researchers in Germany at the Humboldt University of Berlin compared post-vaccination antibodies against HAV in liver and kidney transplant patients, and in healthy controls. Each group was given two doses of vaccine ("Rapid decline of antibodies after hepatitis A immunization in liver and renal transplant recipients," Transplantation, 2001;71(3):455).

When vaccine schedules were completed, new organ recipients had developed sufficient protection against HAV. "However, two years later they had experienced a much more rapid antibody decline than ...

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