Gram-negative bacteria of medical importance

A 5-year-old boy is seen in the pediatric respiratory clinic for a regular review of his cystic fibrosis. He has a productive cough and a specimen is forwarded to the laboratory. Select the culture medium which would be most appropriate to isolate Haemophilus influenzae from this patient.

• Blood agar

• Chocolate bacitracin agar

• MacConkey agar

• Mannitol salt agar

For the following clinical and laboratory scenarios, select the most likely organism from the list of options: Oxidase-positive organism isolated from the aerobic bottle only of a set of blood cultures from a patient with neutropaenic sepsis.

• Pseudomonas aeruginosa

• Klebsiella aerogenes

• Salmonella enteritidis

• Shigella sonnei

For the following clinical and laboratory scenarios, select the most likely organism from the list of options:  Indole-negative and late lactose fermenter isolated from a child with diarrhea in a crèche.

• Klebsiella aerogenes

• Salmonella enteritidis

• Shigella sonnei

• Pseudomonas aeruginosa

A 20-year-old heterosexual male presents to his general practitioner with a 24-hour history of painful dysuria and a thin urethral discharge. Nothing abnormal is found on examination. A Gram-stained smear of a urethral swab shows numerous pus cells and scattered intra-and extra-cellular Gram-negative diplococci. Which is the likely causal organism?

• Neisseria gonorrhoeae

• Treponema pallidum

• Calymmatobacterium granulomatis

• Chlamydia trachomatis

Salmonella Typhi is one of the causative organisms of

• Undulent fever

• Dengue fever

• Enteric fevers

• Remittent fever

The causative organism of whooping cough is

• Vibrio cholerae

• Bordetella pertussis

• Clostridium tetani

• Brucella melitensis

Which of the following microorganisms has not been linked to UTI’s?

• E. coli

• Pseudomonas spp.

• Klebsiella spp.

• Haemophilus spp.