1. A 2-day old premature baby boy born to a 22-year-old woman developed pneumonia. The
mother showed the symptoms of urinary tract infection after the premature delivery. The
blood specimen was taken from the baby, beta-hemolytic colonies were observed in the
culture plate. Which could be the possible pathogen that might have transferred from the
mother to the baby?
a. Streptococcus pyogenes
b. Streptococcus agalactiae
c. Enterococcus faecalis
d. Streptococcus bovis
2. A watery stool sample was collected from the 5-year-old boy who is suffering from the
diarrhoea for 2 days. Smooth and round colonies were observed after the incubation in high
pH media containing NaCl, microscopic examination revealed gram-negative, comma-
shaped bacteria. Name the possible bacteria?
a. Salmonella spp
b. E. coli
c. Helicobacter pylori
d. Vibrio cholerae
3. A 70-year-old woman has sustained third-degree burns over a significant area of her body.
Despite appropriate burn care in the hospital, she develops fever and the nurse reports blue-
green pus on the dressing covering the burned area. Gram stain of the pus reveals gram-
negative rods, and antibiotic sensitivity tests show resistance to most antibiotics. Which one
of the following organisms is most likely to cause this disease?
a. Vibrio vulnificus
b. Bacteroides fragilis
c. Haemophilus influenza
d. Pseudomonas aeruginosa
