virology

Question 1

Influenza viruses:
a ) Possess the surface proteins hemagglutinin (HA) and neuraminidase (NA)
b ) Embryonated eggs and cell cultures can be used for their isolation
c ) are DNA viruses

Answer 1

a ) Possess the surface proteins hemagglutinin (HA) and neuraminidase (NA)
b ) Embryonated eggs and cell cultures can be used for their isolation

Question 2

Avian influenza viruses: *
1 point
a/ possess all the haemagglutinins and neuraminidases subserotypes that are known
b/ do not affect humans
c/ The diagnosis of an infection is made by PCR

Answer 2

a/ possess all the haemagglutinins and neuraminidases subserotypes that are known
c/ The diagnosis of an infection is made by PCR

Question 3

Influenza viruses: *
1 point
a/ Are not antigenically variable
b/ Antigenic drift is caused by point mutations in the genes for the surface proteins
c/ Influenza virus type A can cause epidemics & pandemics

Answer 3

b/ Antigenic drift is caused by point mutations in the genes for the surface proteins
c/ Influenza virus type A can cause epidemics & pandemics

Question 4

Infections caused by Chlamydia and Mycoplasma can be treated with: *
1 point
a) Beta lactams
b) Macrolides and Tetracyclines
c) Vancomycin

Answer 4

b) Macrolides and Tetracyclines

Question 5

Family Chlamydiaceae: *
1 point
a/ includes Coxiella burnetii
b/ C. trachomatis A, B, Ba, C causes trachoma, D-K cervicitis and urethritis, L1-L3 LYMPHOGRANULOMA VENEREUM
c/ includes Chlamidophila pneumonia which causes respiratory tract infections

Answer 5

b/ C. trachomatis A, B, Ba, C causes trachoma, D-K cervicitis and urethritis, L1-L3 LYMPHOGRANULOMA VENEREUM
c/ includes Chlamidophila pneumonia which causes respiratory tract infections

Question 6

Mycoplasmas that are connected with genital tract infections are:
1 point
a/ M. hominis
b/ M. genitalium
c/ M. pneumoniae

Answer 6

a/ M. hominis
b/ M. genitalium

Question 7

COXIELLA BURNETII *
1 point
a/ causes Q fever
b/ can form endospore -like structures and can survive for months in dried feces of ticks
c/ a combination of pneumonia and hepatitis should suggest Q fever

Answer 7

a/ causes Q fever
b/ can form endospore -like structures and can survive for months in dried feces of ticks
c/ a combination of pneumonia and hepatitis should suggest Q fever

Question 7

Infectious forms of C.trachomatis are: *
1 point
a/ elementary bodies
b/ reticulate bodies
c/ both a) and b)

Answer 7

a/ elementary bodies

Question 8

What is true about G. Rickettsia *
1 point
a/ Epidemic typhus is caused by R.prowazekii
b/ R.prowazekii is transmitted by the human body louse and causes infections only in humans
c/ R.prowazekii is transmitted by ticks and causes infections in humans and animals

Answer 8

a/ Epidemic typhus is caused by R.prowazekii
b/ R.prowazekii is transmitted by the human body louse and causes infections only in humans

Question 9

For laboratory diagnosis of M. pneumoniae infections is true: *
1 point
a/ usually it is cultured on artificial solid media
b/ serological methods can be used
c/ NAATs ( nucleic acid amplification tests) can be used

Answer 9

b/ serological methods can be used
c/ NAATs ( nucleic acid amplification tests) can be used