Microbiology Parasitology 173f2c2c Thick PBS is made for: A Speciation B Prevalance of parasite C Both speciation and prevalence D None High-Yield Explanation Ans. is 'b' i.e., Prevalence of parasite (Ref: D.R. Arora, 3rd/e)* Thin PBF - For Speciation.* Thick PBF - For Prevalence and Presence of Malarial parasites.