‫وزارة التعليم العالي‬
‫جامعة المجمعة‬
‫كلية العلوم الطبية التطبيقية‬
‫قسم علوم المختبرات الطبية‬
Ministry of Higher Education
Majmaah University
College of Applied Medical Sciences
Department of Medical Laboratory
Lecture 3
Name of Instructor: Dr. Mosaab Omar
Location: Majmaah male campus
MCQ:
Please find the proper answer of the following:
1- Exotoxins is characterized by…………………..
a- Heat labile
b- Produced by Gram –ve bacteria
c- Produced by both of Gram –ve and gram +ve bacteria
d- Both A and C
2- Exotoxins is characterized by…………………:
a. Are heat stable
b. Produced only by gram –ve bacteria.
c. Produced by bacteria such as Salmonella
d. All of them
3- The following statements regarding Cholera are true except…………
a- It is caused by Vibrio cholera
b- severe diarrhea up to 20 liters a day of rice water stool
c- produces enterotoxin choleragen
d- Incubation period is 4-6 days
4- The following statements regarding Malaria are true except……
a- It is caused by plasmodium
b- It infects the RBCs and Liver
c- It can be treated using antibiotics
d- None of them
5- Which of the following statements regarding Tuberculosis are correct…
a- It is caused by Streptococcus
b- It can be transmitted through airborne droplets
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c- It produces Exotoxin
d- All of them
6- General Characteristics of the Staphylococci includes………………….
a- Spherical cells arranged in irregular clusters
b- Gram-positive
c- Lack spores and flagella
d-
All of them
7- General growth requirements of Staphylococcus species are…………….
a- It needs enriched media
b- They grow well on media without blood or other special supplements
c- It grows very slowly
d- All of them
8- Staphylococcus species can be differentiated from Micrococcus
species based upon oxygen requirements …………………
a- Staph is facultative and Micrococcus species are obligate aerobes
b- Staph is obligate and Micrococcus species are facultative aerobes.
c- Both of them are Obligate
d9- The
none of them
following
statements
regarding
Staphylococcus
except…………….
a- Bacitracin sensitive
b- Grow on agar that contains peptone
c- Inhibited by media that has high bile salt concentration
d- Some are ß-hemolytic
10- Staph aureus is distinguished from the others ……………..
a- coagulase positive,
b- Manitol positive and by causing hemolysis of RBCs in vitro.
c- Coagulase negative
d- Both A and C
11- Staph. aureus produces different enzymes like…………..
2
are
true
a- Free coagulase
b- Catalase
c-
Lipase
d-
Hyaluronidase
e- All of them
12- Cocci gain access to damaged skin, mucosal or tissue site
Colonize by adhering to cells or extracellular matrix
Evade the host defense mechanisms and multiply
Cause tissue damage……..these statements represents……
a- Mechanism of pathogenesis of Staph. aureus
b- Diagnosis of Staph. Aureus
c- Epidemiology of Staph. aureus
d- Morphology of Staph. aureus
13- The most common types of staph. aureus intoxication are……
a- Food poisoning
b- Toxic shock syndrome
c- Staphylococcal scalded skin syndrome
d- All of them
14- High fever, diarrhea, shock and erythematous skin rash which
desquamate
Mediated via ‘toxic shock syndrome toxin’
10% mortality rate, the previously mentioned statements complies with:
a- Toxic shock syndrome of Staph. aureus
b- T.B clinical findings
c- Malaria black water fever
d- None of them
15- Disease of young children, Mediated through minor Staphylococcal
infection by ‘epidermolytic toxin’ producing strains.
Mild erythema and blistering of skin followed by shedding of sheets of
epidermis, the previously mentioned statements comply with:
a- Toxic shock syndrome of Staph. aureus
b- Scalded skin syndrome
c- Impetigo
d- None of them
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