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Determination of anti-Cryptosporidium coproantibodies by time-resolved immunofluorometric assay.

Abstract：

:The role of the mucosal immune response against Cryptosporidium has been suggested by studies on the therapeutic effects of hyperimmune colostrum. In order to study the intestinal response to this infection, we have developed a sandwich-type time-resolved immunofluorometric assay for the determination of anti-Cryptosporidium coproantibodies. This assay has the inherent sensitivity of an immunoassay without the problems due to background responses from other biological compounds, and is thus suitable for faecal samples. The intra-assay coefficients of variation (5.1%, 4.6%, and 5.8% for immunoglobulins (Ig) A, M and G respectively), inter-assay coefficients of variation (9.4%; 10.5% and 12.2% for IgA, IgM and IgG, respectively) and specificity (100% for all 3 isotypes) were all satisfactory. Using this assay to study 12 patients with the acquired immune deficiency syndrome (AIDS) who were infected with cryptosporidiosis, we found a marked elevation of anti-Cryptosporidium IgA and IgM coproantibody titres relative to 18 healthy control values, but no correlation with the gravity of the infection in terms of oocyst shedding. These results suggest that a non-protective mucosal immune response develops to Cryptosporidium in AIDS patients.

journal_name

Trans R Soc Trop Med Hyg

journal_title

Transactions of the Royal Society of Tropical Medicine and Hygiene

authors

Kapel N,Meillet D,Buraud M,Favennec L,Magne D,Gobert JG

doi

10.1016/0035-9203(93)90152-g

subject

Has Abstract

pub_date

1993-05-01 00:00:00

pages

330-2

issue

3

eissn

0035-9203

issn

1878-3503

journal_volume

87

pub_type

杂志文章

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