UlUp Gram+, large, boxcar-like, spe forming(not in host tissues)rods: In infected blood or tissues the bacilli are frequently present in short chains, surrounded by the poly five categories on the sultans category numbers of tandem rel erp n-haemolytic• Gram+ , large, boxcar-like, spore￾forming(not in host tissues)rods; • In infected blood or tissues, the bacilli are frequently present in short chains, surrounded by the polypeptide capsule; • non-motile and non-haemolytic • five categories on the basis of variable numbers of tandem repeats in the variable region of the VrrA gene