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Undernutrition, infection and immune function

Published online by Cambridge University Press:  14 December 2007

Philip C. Calder  and
Alan A. Jackson
Philip C. Calder*
Affiliation:
Institute of Human Nutrition, University of Southampton, Bassett Crescent East, Southampton SO16 7PX, UK
Alan A. Jackson
Affiliation:
Institute of Human Nutrition, University of Southampton, Bassett Crescent East, Southampton SO16 7PX, UK
*
*Corresponding author: Dr Philip C. Calder, fax +44 (0) 23 80594383, email pcc@soton.ac.uk
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Abstract

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Undernutrition and infection are the major causes of morbidity and mortality in the developing world. These two problems are interrelated. Undernutrition compromises barrier function, allowing easier access by pathogens, and compromises immune function, decreasing the ability of the host to eliminate pathogens once they enter the body. Thus, malnutrition predisposes to infections. Infections can alter nutritional status mediated by changes in dietary intake, absorption and nutrient requirements and losses of endogenous nutrients. Thus, the presence of infections can contribute to the malnourished state. The global burden of malnutrition and infectious disease is immense, especially amongst children. Childhood infections impair growth and development. There is a role for breast-feeding in protection against infections. Key nutrients required for an efficient immune response include vitamin A, Fe, Zn and Cu. There is some evidence that provision of the first three of these nutrients does improve immune function in undernourished children and can reduce the morbidity and mortality of some infectious diseases including measles, diarrhoeal disease and upper and lower respiratory tract infections. Not all studies, however, show benefit of single nutrient supplementation and this might be because the subjects studied have multiple nutrient deficiencies. The situation regarding Fe supplementation is particularly complex. In addition to immunization programmes and improvement of nutrient status, there are important roles for maternal education, improved hygiene and sanitation and increased supply of quality water in the eradication of infectious diseases.

Keywords

MalnutritionUndernutritionInfectionImmunityMicronutrients
Type
Research Article
Information
Nutrition Research Reviews , Volume 13 , Issue 1 , June 2000 , pp. 3 - 29
Copyright
Copyright © CABI Publishing 2000

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