All About Vitamins: Vitamin A deficiency and Giardia lamblia infection

Kyle J. Norton(Scholar, Master of Nutrients), all right reserved.
Health article writer and researcher; Over 10.000 articles and research papers have been written and published on line, including world wide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the karate GB daily, etc.,.
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Some articles have been used as references in medical research, such as international journal Pharma and Bio science, ISSN 0975-6299.

Vitamin A, a bi-polar molecule formed by bonds between carbon and hydrogen, is a fat soluble vitamin which can not be stored in the liver but it can be converted from beta-carotene, a powerful antioxidant. The vitamin is best known fir its strong effects in improving vision and enhancing bone growth.

Giardia lamblia infection is an intestinal infection caused by the parasite giardia lamblia. Vitamin A deficiency (VAD) is a nutritional problem affecting the health of people in developing countries, leading decreased immune function, increased the predisposition of infectious diseases, including Giardia lamblia infection.

According to the Centro de Investigación en Alimentación y Desarrollo, Giardiasis not only compromises the vitamin A status through intestinal malabsorption, it also causes profound mobilization of liver retinol stores(1).

In support of the about, a study of 707 children who were 6 to 15 months of age and from periurban areas of Mexico City, Mexico, between January 2000 and May 2002 suggested, "vitamin A and zinc supplementation was associated with distinct parasite-specific health outcomes. Vitamin A plus zinc reduces G. lamblia incidence, whereas zinc supplementation increases A. lumbricoides incidence but decreases E. histolytica-associated diarrhea."(2).

In fact, impairment of vitamin A absorption may also induce the Giardia lamblia infection(3).

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Sources
(1) Giardia lamblia infection and its implications for vitamin A liver stores in school children by Astiazaran-Garcia H1, Lopez-Teros V, Valencia ME, Vazquez-Ortiz F, Sotelo-Cruz N, Quihui-Cota L.(PubMed)
(2) Effect of vitamin A and zinc supplementation on gastrointestinal parasitic infections among Mexican children by Long KZ1, Rosado JL, Montoya Y, de Lourdes Solano M, Hertzmark E, DuPont HL, Santos JI.(PubMed)
(3) Malabsorption of water miscible vitamin A in children with giardiasis and ascariasis by Mahalanabis D, Simpson TW, Chakraborty ML, Ganguli C, Bhattacharjee AK, Mukherjee KL.(PubMed)