This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
Which anticoagulant is used when blood is sent for blood culture - 
Select and explain. 
A. Sodium citrate, B. EDTA, C. Oxalate, D. SPS
D: SPS
Answer: D: SPS 
Explanation: Ans. is 'd' i.e., SPS o Many different types of bacteria and fungi have been identified as causative agents of septicemia,o For this reason, many diverse culture media formulations are available in prepared blond culture bottles.o Majority of these media contain 0 03% SPS (Sodium polyanethal sulfonate), a polyanionic anticoagulant, which additionally inhibits complement and lysozyme activity, interferes with phagocytosis and inactivates aminoglycosides,o Following important blood culture bottles are there :-Brain heart infusion (BH1) with PABA (para-aminobenzoic acid)Brucella broth with 6% sorbitolBrucella broth with 10% sucroseColumbia brothThioglycolate mediumTryptic soy broth