A 2 years old child is brought to the emergency with history of fever and vomiting. On examination he has neck rigidity. CSF examination shows polymorphs more than 200 /ml; protein 100 mg/dl and glucose 10 mg/dl. the Gram's stain shows the presence of Gram-negative coccobacilli. The culture shows of bacteria only on chocolate. Agar and not on blood agar. The causative agent is:: (A) Neisseria meningitidis, (B) Haemophilus influenzae, (C) Branhatnella catarrhalis, (D) Legionella pneuntophila
Answer is B. Ans. (b) H. influenzae See the morphology of asked bacteria, you will know the answer. H. influenzae - Gram-negative coccobacilli N. meningitidis - Gram-negative cocci Legionella - Gram-negative coccobacilli B. catarrhalis - Gram-negative cocci