Mucosal Immunity to Asymptomatic Entamoeba Histolytica and Entamoeba Dispar Infection is Associated with a Peak Intestinal Anti-lectin Immunoglobulin A Antibody Response.
From: Department of Medicine, University of Minnesota, 14-110 Phillips Wangensteen Building, 516 Delaware Street S.E., Minneapolis, MN 55455, USA.
Infection and immunity
- Publish Date: Jul 2006
- ISSN: 0019-9567
- Volume: 74
- Issue: 7
- Pages: 3897-903
- Medium: Print
- Language: English
- Citation (JAMA): Abd-Alla Mohamed D, Jackson Terry F G H, Rogers Tyson, et al. Mucosal Immunity to Asymptomatic Entamoeba Histolytica and Entamoeba Dispar Infection is Associated with a Peak Intestinal Anti-lectin Immunoglobulin A Antibody Response.. Infect. Immun. Jul 2006;74:3897-903
Abstract
We monitored 93 subjects cured of amebic liver abscess (ALA) and 963 close associate controls in Durban, South Africa, and determined by enzyme-linked immunosorbent assay that the intestinal immunoglobulin A (IgA) antibody response to the Entamoeba histolytica galactose-inhibitable adherence lectin is most accurately represented by a complex pattern of transitory peaks. One or more intestinal anti-lectin IgA antibody peaks occurred in 85.9% of ALA subjects over 36 months compared to 41.6% of controls (P < 0.0001). ALA subjects exhibited a greater number of anti-lectin IgA antibody peaks (P < 0.0001) than controls. In addition, their peak optical density values were higher (peak numbers 1 to 3, P < 0.003), peaks were of longer duration (for peaks 1 and 2, P ALA subjects was 0.71 per year, compared to just 0.22 in controls (P<0.0001), indicating a higher rate of exposure to the parasite than previously appreciated. Anti-lectin IgA antibody peaks were of higher amplitude following a E. histolytica infection compared to E. dispar (P = 0.01) and, for either, were of greater height in ALA subjects than controls (P < 0.01). ALA subjects demonstrated greater clearance of amebic infection after an anti-lectin IgA antibody peak compared to controls, and only 14.3% remained with a positive culture after the peak, compared to 38.9% in controls (P = 0.035). In summary, this prospective controlled longitudinal study elucidated the dynamic nature of the human intestinal IgA antibody response to E. histolytica and E. dispar infection and revealed that ALA subjects exhibit heightened intestinal anti-lectin IgA antibody peaks that are associated with clearance of E. histolytica and E. dispar infection.
Mesh Headings (Keywords): Adult, Animals, Antibodies, Protozoan, Entamoeba histolytica, Female, Humans, Immunity, Mucosal, Immunoglobulin A, Intestinal Mucosa, Lectins, Liver Abscess, Amebic, Male
Check for Full Text / PubMed Unique Identifier (PMID): 16790762
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