Journal Article

Serum Mannose-Binding Lectin Deficiency Is Associated with Cryptosporidiosis in Young Haitian Children

B. D. Kirkpatrick, C. D. Huston, D. Wagner, F. Noel, P. Rouzier, J. W. Pape, G. Bois, C. J. Larsson, W. K. Alston, K. Tenney, C. Powden, J. P. O'Neill and C. L. Sears

in Clinical Infectious Diseases

Published on behalf of Infectious Diseases Society of America

Volume 43, issue 3, pages 289-294
Published in print August 2006 | ISSN: 1058-4838
Published online August 2006 | e-ISSN: 1537-6591 | DOI: http://dx.doi.org/10.1086/505396
Serum Mannose-Binding Lectin Deficiency Is Associated with Cryptosporidiosis in Young Haitian Children

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Background. Mannose-binding lectin (MBL) is a component of the innate immune response and binds microbial surfaces through carbohydrate recognition domains. MBL deficiency may contribute to susceptibility to a variety of infectious diseases, particularly in young children. MBL binds to the Cryptosporidium sporozoite and may be important in resistance to cryptosporidiosis.

Methods. We studied the association of serum MBL levels and cryptosporidiosis in a case-control study of young Haitian children with cryptosporidiosis versus children who were control subjects.

Results. Ninety-nine children were enrolled, as follows: 49 children with cryptosporidiosis, 41 healthy controls, and 9 children with diarrhea from other causes. Case children were more malnourished than controls, and 49% had persistent or chronic diarrhea. At enrollment, mean serum MBL levels were markedly lower in children with cryptosporidiosis (P = .002), as was the number of children with an MBL deficiency of ⩽70 ng/mL (P = .005). In multivariate analysis, the association of cryptosporidiosis and MBL deficiency persisted (P = .002; adjusted odds ratio, 22.4), as did the association of cryptosporidiosis with general malnutrition. The subset of children with cryptosporidiosis and MBL deficiency were more likely to be male (P = .025).

Conclusions. MBL may be an important component of innate immune protection against Cryptosporidium infection in young children. Additional studies are necessary to determine whether MBL intestinal losses, deficient epithelial expression, and/or genetic polymorphisms in the MBL gene contribute to MBL deficiency in cryptosporidiosis and other enteric infections in young children.

Journal Article.  3302 words.  Illustrated.

Subjects: Infectious Diseases ; Immunology ; Public Health and Epidemiology ; Microbiology

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