Parasites in faeces - Sunday Challenge

Case: 25 years old female from Singapore has chronic diarrhea that is sometimes bloody. She has abdominal pain as well. Stool sample was taken for screening parasites. Findings from wet mount preparation is in the imagege below. Particles are 50 -80 micrometers.

Can you identify these particles? 

CORRECT ANSWER: Balanditium coli (one cyst and two trophozoites).