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Clinical and Diagnostic Laboratory Immunology, March 1998, p. 247-250, Vol. 5, No. 2
Department of Medical Microbiology and
Immunology1 and
Department of
Infectious Diseases,2 Göteborg University,
Göteborg, Sweden
Received 7 July 1997/Returned for modification 6 October
1997/Accepted 15 December 1997
The possibility that a mucolytic drug, i.e., acetylcysteine, given
orally may enhance the gut mucosal or systemic immune response to an
oral B-subunit-whole-cell (B-WC) cholera vaccine was evaluated for 40 adult Swedish volunteers, and the kinetics of the immune responses were
monitored for responding volunteers. Two doses of vaccine induced
similar frequencies of immunoglobulin A (IgA) and IgG antitoxin
responses (80 to 90%) and vibriocidal titer increases (60 to 65%) in
serum irrespective of whether the vaccine was given alone or together
with 2 g of acetylcysteine. In feces the frequencies of IgA
antitoxin (67%) and antibacterial (33 to 40%) antibody responses were
also comparable in the two immunization groups. Six months after
vaccination, IgA and IgG antitoxin as well as vibriocidal antibody
titer increases in serum could still be detected in approximately 80%
of initially responding vaccinees. Significantly elevated fecal
antitoxin and antibacterial IgA antibody levels were found in,
respectively, 50 and 43% of those volunteers who initially had
responded to the vaccine. Determination of IgA antibodies in feces does
not seem to offer any advantages compared to determination in serum for
assessment of immune responses after immunization with inactivated
cholera vaccine.
1071-412X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Kinetics of Local and Systemic Immune Responses to an Oral
Cholera Vaccine Given Alone or Together with Acetylcysteine
*
Corresponding author. Mailing address: Department of
Medical Microbiology and Immunology, Göteborg University,
Guldhedsgatan 10, S-413 46 Göteborg, Sweden. Phone: 46 (31) 60 46 81. Fax: 46 (31) 82 69 76.
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