Exam 3

Question 1

Which on of the following statements are incorrect about Campylobacter, Helicobacter, & Lawsonia?
A. They are Gram- organisms
B. They are pathogens of gastrointestinal tract & occasionally genital tract
C. Aerobic culture is the method of diagnosis
D. All of these are extracellular pathogens

Answer 1

C (Can’t culture Lawsonia) & D (Lawsonia is intracellular)

Question 2

Guillain Barre syndrome is associated with infection caused by the bacteria:
A. Campylobacter jejuni
B. Campylobacter fetus subsp. venerialis
C. Campylobacter coli
D. Zika virus

Answer 2

A. Campylobacter jejuni

Question 3

The most common source of Campylobacter jejuni infection:
A. Poultry
B. Milk
C. Ground water
D. Salt water

Answer 3

A. Poultry

Question 4

Major route of infection caused by C. fetus subsp. fetus?
A. Ingestion
B. Inhalation
C. Venereal
D. Wound infection

Answer 4

A. Ingestion

Question 5

The main manifestation of infection caused by C. fetus subsp. venerialis is?
A. Infertility
B. Abortion
C. Placentitis
D. Mastitis

Answer 5

A. Infertility (& early embryonic death)

Question 6

Which of the following bacteria is involved in hepatocellular neoplasms in mice?
A. Helicobacter pylori
B. Helicobacter bilis
C. Helicobacter mustelae
D. Helicobacter heilmanni

Answer 6

B. Helicobacter bilis

Question 7

Which of the following test is used for the diagnosis of Helicobacter pylori?
A. Catalase
B. Oxidase
C. Urease
D. Mucinase

Answer 7

C. Urease

Question 8

Lesion in the ileum of a poor doing foal; Most likely etiology is?
A. Lawsonia intracellularis
B. Campylobacter jejuni
C. Helicobacter equi
D. Campylobacter coli

Answer 8

A. Lawsonia intracellularis

Question 9

Tetanus toxin is a neurotoxin & act by inducing:
A. Necrosis of nerve endings
B. Inflammation of nerves
C. Inhibition of neurotransmitters
D. Paralysis of muscles

Answer 9

C. Inhibition of neurotransmitters

Question 10

Which of the following statements is correct?
A. Tetanus toxoid is an inactivated toxin
B. Tetanus toxoid is an inactivated bacterin
C. Tetanus toxin directly affect the muscles
D. Tetanus occurs after ingestion of toxin

Answer 10

A. Tetanus toxoid is an inactivated toxin

Question 11

The main mode of transmission of Botulism is?
A. Ingestion of toxin
B. Ingestion of bacteria
C. Inhalation of toxin
D. Wound infection

Answer 11

A. Ingestion of toxin

Question 12

Which of the following is the major symptom of tetanus?
A. Flaccid paralysis
B. Spastic paralysis

Answer 12

B. Spastic paralysis

Question 13

Which of the following clostridium does not exert its effect through histotoxic activity?
A. C. chauvoei
B. C. septicum
C. C. perfringens
D. C. botulinum

Answer 13

D. C. botulinum***

Question 14

Black leg is caused by:
A. C. chauvoei
B. C. tetani
C. C. perfringens
D. C. botulinum

Answer 14

A. C. chauvoei

Question 15

A fast, practical & reliable test to diagnose Black leg in cattle is:
A. aerobic culture
B. Anaerobic culture
C. Direct fluorescent antibody staining of affected tissue
D. ELISA

Answer 15

C. Direct fluorescent antibody staining of affected tissue

Question 16

Enteropathogenic Clostridium include all except:
A. C. difficile
B. C. botulinum
C. C. perfringens
D. C. colinum

Answer 16

B. C. botulinum

Question 17

Which of the following is incorrect about C. piliforme?
A. Cause Tyzzers disease
B. Is a Gram- Clostridium
C. Diagnosed by anaerobic culture
D. Liver necrosis is a common lesion

Answer 17

C. Diagnosed by anaerobic culture

Question 18

Phenomenon of presence of titers to multiple non-infecting serovars is known as?
A. Hypersensitivity reactions
B. Paradoxical reactions
C. Paired titers
D. Cross reactivity

Answer 18

B. Paradoxical reactions

Question 19

Choose the incorrect statement:
A. Swine dysentery is caused by Brachyspira hyodysentraie
B. This bacteria mainly causes lesions in the duodenum & ileum
C. This disease affects young animals
D. Asymptomatic carriers are involved in the transmission of the disease

Answer 19

B. This bacteria mainly causes lesions in the duodenum & ileum

Question 20

Choose the incorrect statement:
A. Lyme disease is caused by Borrelia burgdorferri
B. Lyme disease is an arthropod borne disease
C. Antigenic variation in outer surface proteins of this bacteria is a major virulence factor
D. The disease is confirmed if antibodies are detected in the patient

Answer 20

D. The disease is confirmed if antibodies are detected in the patient

Question 21

Characteristics of Mycoplasma include all except:
A. Absence of cell wall
B. Susceptibility to beta lactams
C. No gram staining
D. Colonize ciliateded epithelium

Answer 21

B. Susceptibility to beta lactams

Question 22

Enzootic pneumonia in swine is caused by:
A. Mycoplasma hyorhinis
B. Mycoplasma hyosynoviae
C. Mycoplasma suis
D. Mycoplasma hyopneumoniae

Answer 22

D. Mycoplasma hyopneumoniae

Question 23

Which of the following is incorrect regarding enzootic pneumonia in swine?
A. caused by M. hyopneumoniae
B. Causes anteroventral pneumonia
C. Predisposes to secondary bacterial infection
D. Causes anemia

Answer 23

D. Causes anemia

Question 24

Which of the following mycoplasma infection is not a reportable disease?
A. Mycoplasma mycoides subsp. mycoides
B. M. capricolum subsp. Capripneumoniae
C. Mycoplasma galiisepticum
D. Mycoplasma ovipneumoniae

Answer 24

D. Mycoplasma ovipneumoniae

Question 25

Anaplasma marginalea & Mycoplasama hemofelis infect RBC. Which of the following is correct? A. Both of them does not have a cell wall B. Both of them are intracellular C. Both of them are transmitted through ticks D. Both of them are bacteria

Answer 25

D. Both of them are bacteria

Question 26

``` Which of the following statements is incorrect about Rickettsia? A. Gram- bacteria B. Transmitted by arthropods C. Facultative intracellular bacteria D. Susceptible to tetracycline ```

Answer 26

C. Facultative intracellular bacteria

Question 27

``` Members of the genus Rickettsia generally have affinity to: A. Endothelium B. Epithelium C. Leukocytes D. Erythrocytes ```

Answer 27

A. Endothelium

Question 28

``` Select the incorrect pair: A. Rickettsia rickettsia - endothelium B. Anaplasma marginale - RBC C. Chlamydia psittaci - monocytes D. Anaplasma platys - platelets ```

Answer 28

C. Chlamydia psittaci - monocytes (should be epithelial cells)

Question 29

``` Which of the following is incorrect about fungi? A. Fungi have nucleus B. Fungi have ribosomes C. Fungi have mitochondria D. They are always multicellular ```

Answer 29

D. They are always multicellular

Question 30

``` A component of fungal cell membrane is: A. Peptidoglycan B. Ergosterol C. Mycolic acid D. Lipopolysacchride ```

Answer 30

B. Ergosterol

Question 31

``` Which of the following statements is incorrect about fungal morphology? A. Unicellular forms are called yeast B. Multicellular forms are called mold C. Hyphae are unicellular D. Mycelium is a group of tangled hyphae ```

Answer 31

C. Hyphae are unicellular

Question 32

``` Anti-fungal agent generally targets: A. Membrane ergosterol B. protein synthesis C. Cell wall synthesis D. Ribosomes ```

Answer 32

A. Membrane ergosterol

Question 33

``` Which of the following is incorrect regarding the use of Griseofulvin? A. Inhibit cell division B. Accumulates in keratin C. Oral administration D. Act against multiple fungal species ```

Answer 33

D. Act against multiple fungal species

Question 34

Fungal diseases (incorrect): A. Can be due to tissue invasion B. Can be due to toxins produced by fungus C. Can induce hypersensitivity reactions D. Can commonly induce suppurative lesions

Answer 34

D. Can commonly induce suppurative lesions

Question 35

``` Which of the following is incorrect about dermatophytes? A. they cause superficial skin disease B. Affinity to keratinized epitelialium C. They are zoonotic D. Systemic infections may occur ```

Answer 35

D. Systemic infections may occur

Question 36

``` Identify the correct dermatophyte host pair? A. T. verrucossum - Horse B. M. canis - cats C. M. nanum - dogs D. T. mentagrophyte - cattle ```

Answer 36

B. M. canis - cats

Question 37

Which of the following statements is incorrect? A. M. canis can cause pseudomycetoma in Persian cats B. Griseofulvin is effective against dermatophytes C. The sample for diagnostic testing should be collected from the center of the lesion D. Cats are asymptomatic carriers of M. canis

Answer 37

C. The sample for diagnostic testing should be collected from the center of the lesion

Question 38

``` Woods lamp fluorescence is used for the diagnosis of: A. M. canis B. M. nanum C. T. verruossum D. T. mentagrophytes ```

Answer 38

A. M. canis