A 23 years old femau, sensorium for two days with the following rash on legs. Her BP is 70/50 mm Hg and neck stiffness is present. Lumbar puncture reveals cloudy CSF with 4200 cells/ pL, protein level 198 and glucose of 21 mg/dL. Which of the following correctly describes the organism causing this condition?
A. Gram-positive cocci catalase negative, bacitracinsensitive
B. Gram-positive diplococci (lanceolate), catalase negative, optochin sensitive
C. Gram-negative diplococci, ferments glucose and maltose
D. Gram-negative diplococci (kidney-shaped), oxidase positive
Ans: C. Gram-negative diplococci, ferments glucose and maltose
(Ref: Ananthanarayan 10Ie p230, 8Ie p223, 230).
- The clinical-picture given in the question i.e. meningitis with a typical purpuric rash is seen in meningococcemia due to Neisseria meningitidis, which is Gram-negative diplococci and ferments glucose and maltose.