Smallest helminth among the following is:: (A) Hymenolepis diminuta, (B) Hymenolepis nana, (C) Diphyllobothrium latum, (D) Balantidium coli
Answer is B. Smallest helminth among the following is H nana also known as dwarf tapeworm with adult length of 15-44 mm. H. diminuta also known as rat tapeworm has a length of 20-60 cms. Balantidium coli is a large ciliated protozoan (50-130 um) and width 20-70 um) Diphyllobothrium latum can reach upto 30 fts.