CB LEC - MODULE 6, UNITS 1 TO 4

Question 1

A nonresident of the human GIT that causes extra-intestinal infections involving lymph nodes that become painful, swollen and necrotic.

Answer 1

Yersinia pestis

Question 2

Which among the diarrheagenic strains of E. coli is associated with a syndrome characterized by thrombocytopenia, hemolytic anemia, and kidney failure?

Answer 2

EHEC

Question 3

Frequently associated with hospital-acquired infections, this pathogen causes hemorrhagic consolidation of the lungs which result in the production of thick, mucoid, and currant jelly-like sputum.

Answer 3

K. pneumoniae

Question 4

Struvite formation in the urinary tract is associated with which of the following virulence factors?

Answer 4

Urease

Question 5

Development of “rose spots” and long term carriage of the pathogen is a feature of infection caused by:

Answer 5

Salmonella Typhi

Question 6

Infections caused may fall into one of four categories which vary depending on the site affected and frequency.

Answer 6

Aeromonas species

Question 7

Causes a disease characterized by profuse watery diarrhea with stools likened to “rice water” that may be as many as 10 to 30 per day.

Answer 7

V. cholerae

Question 8

Has been linked with malignancies in the GIT and lymphoid tissue.

Answer 8

H. pylori

Question 9

Gastrointestinal infections are considered an antecedent to the development of an autoimmune disorder.

Answer 9

C. jejuni

Question 10

Infection of the blood originates from the gastrointestinal route after ingestion of contaminated raw shellfish.

Answer 10

V. vulnificus

Question 11

Nonfermentative gram-negative bacilli include the following, EXCEPT:

Answer 11

those that utilize carbohydrates anaerobically

Question 12

The pigment produced by all pseudomonas classified under the Fluorescent group.

Answer 12

Pyoverdin

Question 13

The causative agent of melioidosis is:

Answer 13

Burkholderia pseudomallei

Question 14

Which of the following virulence factors of Pseudomonas aeruginosa has a mechanism of action likened to that of the diphtheria toxin?

Answer 14

Exotoxin A

Question 15

The causative agent of glanders in horses is:

Answer 15

Burkholderia mallei

Question 16

Strains are classified on the basis of possession of a polysaccharide capsule.

Answer 16

Haemophilus influenzae

Question 17

Causes a disease that runs a chronic course characterized by coughing spells that end in a whoop.

Answer 17

Bordetella pertussis

Question 18

Also commonly known as Bang’s bacillus.

Answer 18

Brucella abortus

Question 19

The causative agent of deerfly fever.

Answer 19

Francisella tularensis

Question 20

Couples with the lipopolysaccharide component of cell wall that kills ciliated epithelial cells by inducing nitric oxide production.

Answer 20

Tracheal cytotoxin