Final Exam

Question 1

A prokaryote is an organism with:
A. No chromosome
B. No nucleus
C. No proteins
D. No nucleic acid

Answer 1

B. No nucleus

Question 2

Which of the following is a prokaryote?
A. Bacteria
B. Fungus
C. Protozoa
D. Helminth

Answer 2

A. Bacteria

Question 3

Which of the following components are present in a bacteria?
A. Nucleus
B. Histones
C. Sterol in the cell wall
D. Chromosome
E. Ribosomes
F. Membrane bound organelles

Answer 3

D. Chromosome;

E. Ribosomes

Question 4

Which of the following components are NOT present in bacteria?
A. Nucleus
B. Histones
C. Complex cell wall
D. Peptidoglycan
E. Chromosomes
F. Ribosomes
G. Membrane bound organelles

Answer 4

A. Nucleus;
B. Histones;
G. Membrane bound organelles

Question 5

Mycology is the study of:
A. Mycobacterium
B. Mycoplasma
C. Fungus
D. Protozoa
E. Virus

Answer 5

C. Fungus

Question 6

Which of the following is a cell wall component unique to bacteria?
A. Proteoglycan
B. Peptidoglycan
C. Lipopolysaccharide
D. Mycolic acid

Answer 6

B. Peptidoglycan

Question 7

Cell wall component unique to Gram+ bacteria?
A. Lipopolysaccharide
B. Teichoic acid
C. Mycolic acid
D. Peptidoglycan

Answer 7

B. Teichoic acid

Question 8

Cell wall component unique to Gram- bacteria?
A. Lipopolysaccharide
B. Teichoic acid
C. Mycolic acid
D. Peptidoglycan

Answer 8

A. Lipopolysaccharide

Question 9

Gram+ staining in some bacteria is due to the presence of a:
A. Peptidoglycan layer
B. Teichoic acid
C. A thick peptidoglycan layer
D. Thick outer membrane

Answer 9

C. A thick peptidoglycan layer

Question 10

Acid fast positive staining in Mycobacteria is due to the presence of:
A. Lipopolysaccharide
B. Teichoic acid
C. Mycolic acid
D. Peptidoglycan

Answer 10

C. Mycolic acid

Question 11

Choose the correct statement:
A. All bacteria have an outer membrane
B. Mycobacteria have lipopolysaccharide
C. Peptidoglycan is present only in Gram+ bacteria
D. Mycobacteria are the only acid fast positive bacteria
E. Teichoic acid is unique to Gram+ bacteria

Answer 11

E. Teichoic acid is unique to Gram+ bacteria

Question 12

Which on of the following processes is the LEAST likely virulence mechanism in bacteria?
A. Bacterial movement using flagella
B. Bacterial attachment using fimbriae
C. Biofilm production & attachment to surfaces
D. Bacterial protein production by ribosomes

Answer 12

D. Bacterial protein production by ribosomes

Question 13

Identify the mismatched pair?
A. Flagella - Motility
B. Fimbriae - adherence
C. Capsule - protect from phagocytosis
D. Spores - survival
E. Endoflagella - binary fission

Answer 13

E. Endoflagella - binary fission

Question 14

Choose the incorrect statement:
A. All fungi are eukaryotes
B. Yeast are fungi
C. Hyphae are multicellular
D. Dimorphic fungi can exist in yeast & mold form
E. Fungal cell membranes contain sterols
F. Fungal cell walls contain peptidoglycan

Answer 14

F. Fungal cell walls contain peptidoglycan

Question 15

Which of the following is not a dimorphic yeast?
A. Blastomyces
B. Histoplasma
C. Coccidioides
D. Cryptococcus

Answer 15

D. Cryptococcus

Question 16

Results from Serum testing for Brucellosis;
Animal X - Serum titer=1/100
Animal Y - Serum titer=1/800
Interpretation: Animal Y has higher levels of antibody then Animal X. T/F?

Answer 16

True

Question 17

Choose the incorrect statement regarding antibody titers:
A. A positive antibody titer is always diagnostic
B. False positive response can be due to previous exposure or vaccination
C. False negative response can occur in early infection
D. False negative results can occur due to anergy in the late stages of the disease
E. Four fold increase in the convalescent titer is suggestive of an active infection

Answer 17

A. A positive antibody titer is always diagnostic

Question 18

A common bacterial isolate from canine pyoderma:
A. Staph. pseudintermedius
B. Staph. pseudointermedius
C. Staph. intermedius
D. Staph. aureus

Answer 18

A. Staph. pseudintermedius

Question 19

Greasy pig disease in pigs is caused by?
A. Erysipelothrix rhusiopathiae
B. Hemophilus parasuis
C. Staph. hyicus
D. Strep. suis

Answer 19

C. Staph. hyicus

Question 20

Select correct disease-organism pair:
A. Strangles - Strep. equi subsp. equi
B. Pigeon Fever - Corynebacterium pseudotuberculosis
C. Glanders - Burkholderia mallei
D. Melioidosis - Burkholderia pseudomallei

Answer 20

All of the above

Question 21

Characteristic skin lesions observed in swine erysipelas is a local suppurative dermatitis. T/F?

Answer 21

False

Question 22

Which of the following statements is incorrect:
A. Foal pneumonia is caused by Rhodococcus equi
B. R. equi is facultative intracellular bacteria
C. R. equi is partially acid fast positive
D. Penicillin is the antibiotic of choice in treating R. equi infections

Answer 22

D. Penicillin is the antibiotic of choice in treating R. equi infections

Question 23

Prototheca is a:
A. Fungus
B. Bacteria
C. Algae
D. Oomytes

Answer 23

C. Algae

Question 24

In horses, guttural pouch mycoses may occur as a complication of:
A. Strangles
B. Pigeon Fever
C. Glanders
D. Pseudoglanders

Answer 24

A. Strangles

Question 25

``` Which of the following bacteria commonly associated with enterotoxemia in farm animals? A. Clostridium perfringens B. Clostridium chauvoei C. E. coli D. Salmonella ```

Answer 25

A. Clostridium perfringens

Question 26

Brucellosis is suspected in a dog presented with: A. Reproductive disorders in a female dog B. Acute orchitis in a male dog C. General illness & lymphadenopathy D. Discospondylitis or osteomyelitis E. All of the above

Answer 26

E. All of the above

Question 27

``` In your knowledge, which of the following organisms do not have a predilection site for nervous tissue? A. Cryptococcus neoformans B. Histophilus somnei C. Listeria monocytogenes D. Salmonella ```

Answer 27

D. Salmonella

Question 28

``` Which of the following is not a histotoxic Clostridium? A. C. chauvoei B. C. novyi C. C. septicum D. C. difficile ```

Answer 28

D. C. difficile