A patient presents with diarrhea. analysis of stool on wet mount shows mobile protozoa without RBCs and pus cells. The diagnosis is: (A) Balantidium coli, (B) Giardiasis, (C) Trichomonas hominis, (D) Entamoeba histolytica
Answer is B. Mobile protozoa with the absence of RBC's and pus cells in stools in a patient with diarrhoea suggests giardiasis.
In balantidium coli and entamoeba histolytica infections, pus cells and RBC's will be present in stools.
Trichomonas hominis is considered as non-pathogenic