Which is the most common contaminant in a positive blood culture?: (A) Staphylococcus epidermidis, (B) Bacteriodes, (C) Candida, (D) E.coli
Answer is A. Among the options provided common contaminant in positive blood culture is Staphylococcus epidermidis (Coagulase negative staphylococcus- CONS) followed by other normal skin flora (other bacteria like Propionibacterium spp) and Candida species.Ref: Ananthanarayan 9th edition, p 622