Causative Microorganism

Question 1

Most likely causative organism of meningitis in the >3 months age group

Answer 1

Neisseria Meningitidis
Streptococcus pneumoniae
Haemophilus influenzae (in 3 months - 6 years)
Listeria Monocytogenes (>60 years or immunosuppresed)

Question 2

Most likely causative organism of Meningitis in the age group 0-3 months

Answer 2

Group B streptococcus
E.Coli
Listeria monocytogenes

Question 3

Most likely causative organism of a lower respiratory tract infection in patients with cystic fibrosis?

Answer 3

Pseudomonas aeruginosa
(Gram negative encapsulated bacilli and Ziehl-Nielsen stain negative)

Question 4

Most likely causative organism of atypical pneumonia which organism grows on Eaton agar

Answer 4

Mycoplasma pneumonia

Question 5

Moat likely causative Helminth (parasitic worm) to a man who presents with diarrhoea and abdominal pain, associated with papulovesicular lesions on the soles of his feet and an urticarial rash

Answer 5

Stronglyoides stercoralis

Question 6

Most likely causative organism of Bacterial Vaginosis

Answer 6

Overgrowth of Gardnerella Vaginalis