Bisected pearls appearance on culture medium is seen in ?: (A) Brucella, (B) Bordetella, (C) Haemophilus ducreyi, (D) Pseudomonas
Answer is B. Ans. is 'b' i.e., Bordetella Bordetella are gram-negative, capsulated, fimbriated, nonmotile coccobacillus.They show bipolar metachromatic granules on staining with toluidine blue.