Blastocystis which is commonly found in the gastro-intestinal tract, has been recognized as a non-pathogenic organism for a few decades. It has a variable distribution. A high prevalence has been reported in developing countries (22.1-100%).~In developed countries, the prevalence ranges from 0.5% to 23.1%. The high prevalence noted in developing countries is related to poor hygiene and lack of safe water and food. The pathogenicity of Blastocystis is controversial because most patients carrying this parasite are asymptomatic. Several studies have considered Blastocystis sp. as a commensal micro-organism, while other results have showed the pathogenicity of the parasite.~Calprotectin (CP), a calcium-binding protein, comprises 60% of cytosolic protein found in neutrophils. Fecal calprotectin (F-CP) concentration is an indicator of neutrophil migration into the intestinal lumen and is associated with intestinal inflammation.
Blastocystis which is commonly found in the gastro-intestinal tract, has been recognized as a non-pathogenic organism for a few decades. It has a variable distribution. A high prevalence has been reported in developing countries (22.1-100%).~In developed countries, the prevalence ranges from 0.5% to 23.1%. The high prevalence noted in developing countries is related to poor hygiene and lack of safe water and food .