alexa Diarrhoeal disease: current concepts and future challenges. Pathogenesis of giardiasis.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Farthing MJ

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Abstract Giardiasis is the most common small intestinal protozoal infection and is found worldwide. The mechanisms by which Giardia duodenalis (= G. lamblia) produces chronic diarrhoea and malabsorption have still not been clearly defined. Many infections are associated with mild to moderate mucosal damage which, in animal models of infection, have functional correlates. Possible mechanisms include direct physical injury, release of parasite products such as proteinases or lectin, and mucosal inflammation associated with T cell activation and cytokine release. Other possible mechanisms of malabsorption include associated bacterial overgrowth and bile salt deconjugation, bile salt uptake by the parasite with depletion of intraluminal bile salts, and inhibition of pancreatic hydrolytic enzymes. Thus, there is no single mechanism to explain the diarrhoea and malabsorption caused by Giardia, which currently should be regarded as a multifactorial process.
This article was published in Trans R Soc Trop Med Hyg and referenced in Journal of Antivirals & Antiretrovirals

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