Abstract
Many studies have suggested that Blastocystis parasites are pathogenic protozoan parasites and one study proposed that these parasites have contributed to anaemia in children. The primary objective of the present study was to made a comparison between healthy control subjects (group 1), Blastocystis-positive subjects (group 2), subjects with irritable bowel syndrome (IBS) who were Blastocystis-negative (group 3), and IBS patients who were Blastocystispositive (group 4) regarding the haematological indices. From each participant, blood has been collected and the complete blood count (CBC) has been measured. The current study also was designed to evaluate the correlation between blastocystosis and six selected hemogram parameters [monocyte-to-lymphocyte ratio (MLR), neutrophil-tolymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), red cell distribution width (RDW), platelet distribution width (PDW), and mean platelet volume (MPV)]. The results revealed that the total numbers of lymphocytes and platelets decreased significantly (P<0.0001), while the numbers of monocytes (P<0.0001) and neutrophils (P<0.0001) increased significantly in the bloods of IBS patients and non-IBS subjects who were infected with Blastocystis parasites in comparison with the healthy subjects in the control group. In addition, our results revealed for the first time that the levels of NLR, MLR, PLR, RDW, PDW and MPV were significantly higher (P=0.05-0.0001) in the bloods of IBS patients and non-IBS subjects who were infected with Blastocystis parasites than in their Blastocystis-negative counterparts. In conclusion, we believe that the levels of these hemogram parameters can be used as novel markers of blastocystosis. In addition, this study revealed that the infection with Blastocystis parasites had a significant impact on the haematological indices in both IBS patients and non-IBS individuals.
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