MLSBACT12 Lecture Special Quiz

An oxidase-negative, gram-negative bacillus produces an acid slant and acid butt on triple sugar iron agar. What sugar/s is/are fermented by the organism?

• Glucose only

• Lactose only

• Glucose and Lactose or Sucrose

• Lactose or Sucrose, but not glucose

TSI test shows acid slant and acid butt. However, Mac Konkey agar shows non-lactose fermenter. What is the presumptive organism?

• Escherichia

• Enterobacter

• Klebsiella

• Serratia

Rose spot skin rashes is a classic sign of_________.

• Hemolytic Uremic Syndrome

• Meningococcemia

• Scarlet Fevel

• Typhoid Fever

Diarrheic stool reveals pus cells in microscopy. It was presumptively identified as Escherichia coli. Identify the causative agent.

• ETEC

• EPEC

• EHEC

• EIEC

The pH indicator used in Christensen Urea Broth.

• Neutral Red

• Methyl Red

• Phenol Red

• Safranin Red

Pelvic inflammatory disease (PID) is a one of the sequelae of gonorrhea in females. PID is a/an inflammation of:

• Uterus only

• Uterus and fallopian tube

• Uterus, fallopian tube and ovaries

• Ovaries and Uterus

Identify the medium.

• Simmon Citrate Agar

• Triple Sugar Iron Agar

• Lysine Iron Agar

• Sulfide Indole Motility Agar

What is the pH indicator used in TSI?

• Bromthymol Blue

• Bromcresol Purple

• Neutral Red

• Phenol Red

The unknown organism was isolated for 24 hours on Mac Konkey Agar. What is the presumptive organism?

• Serratia marcescens

• Escherichia coli

• Enterobacter cloacae

• Klebsiella pneumoniae

Given the negative and positive reaction. Identify the culture media used.

• TSI

• LIA

• SCA

• SIM