Bacteria

Question 1

In seriological typing, what is meant by “type O antigens”?

Answer 1

Cell wall antigens

Question 2

In serological typing, what is meant by “H antigens”?

Answer 2

Flagella antigens

Question 3

In serological typing, what is meant by “type P antigens”?

Answer 3

Pilus antigens

Question 4

In serological typing, what is meant by “k antigens?”

Answer 4

Capsule

Question 5

With regards to serological typing, in E. Coli O157:H7, where are the antigens located?

Answer 5

Cell wall antigen 157

Flagella antigen 7

Question 6

Which genus of bacteria have the following characteristics:
Acid fast positive
Gram positive, bacilli, thin, straight, tend to clump
Multilayered cell wall
Complex waxes and long chained fatty acids (70-80 carbons)
Selective media is required
Slow growing (6-9 weeks)

Answer 6

Genus mycobacterium

Question 7

What are the two selective media required for growing genus mycobacterium?

Answer 7

Lowenstein Jensen agar

Middlebrook agar

Question 8

What type of stain and shape is mycobacterium tuberculosis?

Answer 8

Gram +
Bacilli
Acid fast +

Question 9

Which bacteria is tested by the Tine test and the Mantoux tests?

Answer 9

Mycobacterium Tuberculosis

Question 10

What is the primary lesion of myobacterium tuberculosis called?

Answer 10

Tubercle

Question 11

What is the vaccine bacteria for myobacterium tuberculosis?

Answer 11

Myobacterium bovis

Question 12

What does the BCG Vaccine protect against in humans?

Answer 12

Myobacterium tuberculosis

Question 13

How is myobacterium tuberculosis spread?

Answer 13

Pulmonary - through aero soles

Question 14

Which bacterium has a classic presentation of “cording factor” looping of cell wall lipids?

Answer 14

Myobacterium tuberculosis

Question 15

Which bacteria leaves behind a “Gohn Complex”?

Answer 15

Myobacterium tuberculosis

Question 16

Circular lesions on x ray that look like cheese due to their central caseating necrosis surrounded by macrophages trying their best to phagocytize the bacteria.

Answer 16

Gohn Complex

Question 17

Why can’t the macrophages take care of myobacterium tuberculosis?

Answer 17

The organism is phygocytized but there is no lysosomal fusion

Question 18

A positive PPD test for tuberculosis causes what type of Hypersensititvity reaction?

Answer 18

Type IV HSR - Delayed

Question 19

Why does the US not typically give the BCG Vaccine?

Answer 19

Because it show up positive on a PPD skin test if a pt. Has been vaccinated before

Question 20

What shape and gram test results would you find with Mycobacterium Bovis?

Answer 20

Gram +
Bacillus
Acid Fast +

Question 21

Which bacteria is similar to myobacterium tuberculosis but in cows?

Answer 21

Mycobacterium bovis

Question 22

Which bacteria has the following characteristics: spread through unpasteurized milk or imported cheeses, especially from Mexico and central and South America, is gram +, bacilli shaped, and acid fast +?

Answer 22

Mycobacterium bovis

Question 23

Causative agent of Hansen’s disease

Answer 23

Mycobacterium leprae

Question 24

Which bacteria does not grow in artificial medium and uses armadillos and rats as a reservoir?

Answer 24

Mycobacterium leprae

Question 25

What are the two forms of mycobacterium leprae?

Answer 25

Lepramatous and tuberculoid

Question 26

Which bacteria has the following characteristics: damage to extremities (cooler areas), causes nerve damage and bone reabsorption during infection, is treated with sulfa drugs, there is no vaccine because the virulence factor is poorly understood but we do know the disease is not spread via the lesions.

Answer 26

Mycobacterium leprae

Question 27

Which group of bacterium have no protection from spores, oxygen will kill them, are found deep within the body develop endogenous diseases from normal flora getting out of normal area, highly pleomorphic, diseases are poly micro in, cause abscesses, Prereduced anerobically sterile PRAS media required, gram variable, have Gas Liquid Chromatography (GLC) lipid profiles and are IDed by fatty acid profiles?

Answer 27

Non-sporeforming anaerobes

Question 28

Which bacteria has the following characteristics: gram - bacillis, normal intestinal flora, cause endogenous infections/internal abscesses), are opportunistic when there is an intestinal rupture (knife wound, gunshot wound, bursting appendix, abdominal damage), uses a polysaccharide capsule and endotoxin as its virulence factor causing it to be naturally resistant to antibiotics, is difficult to find in fecal material because it is a non-spore forming and robe and the exposure to O2 will kill it?

Answer 28

Bactericides fragilis