microbio final multiple choice

Viruses have

DNA or RNA

The basic components of a virus are

nucleic acid, protein coat

the type of media viruses grow in include A: cell cultures, B: living animals C: embryonated eggs

A only

This type of virus has 2 types (A and B) and undergoes frequent recombination

influenza

the treatment for respiratory syncytial virus is

ribavizine

humans are the only natural host in

poliovirus

which of the following is false regarding measles

vaccine is rarely effective due to frequent changes in surface antigens

which of the following is false regarding rubella

very dangerous for non-immune pregnant women especially during second trimester

Herpes Zoster

all of the above

papilloma virus

appears as common warts and genital warts

mumps causes

glandular enlargement

epstein-barr virus, also known as kissing disease is diagnosed by

the presence of immunoglobulins in serum sample

which hepatitis is sexually transmitted? A, B, C, Delta Agent, E, G.,

B,C, delta agent, G

A patient receiving a liver transplant is tested positive for CMV. The donor of the liver is also positive for CMV. How will the transplant proceed?

the transplant will proceed as normal

The following is false regarding hepatitis C

transmitted faecal-oral route

which regarding HIV is false?

it disables B-lymphocytes from producing immunoglobins

The following is seen very frequently in immunocompromised patients, especially AIDS patients A: cryptococcus infection, B. tuberculosis infection C. yeast infection

A and B only

What makes HIV extremely difficult to deal with is the fact that

it has frequent antigenic changes

Which of the following is true regarding yellow fever virus?

50% mortality rate

when symptoms of rabies start to occur it is

always fatal

the factors that play an essential role in transmitting infections are A: source B: fomites C: host

C only

The most efficient step in controlling nosocomial infections is

identification of source

The following is not a measure taken affecting the source

treatment of infections

the following is not a measure taken affecting the route of transmission

ventilation

the following is not a measure taken affecting the host

asepsis

universal precautions are not a substitute for

isolation procedures

an infection control committee includes

all of the above

a general term for destroying or removing harmful microorganisms, chemicals or radioactivity on an object or surface is

disinfection

a physical or chemical means to totally destroy all types of microorganisms in or on an object is

sterilization

the means of cleaning include A: physical means, B: chemical means C: biological means

A only

antibodies are produced by

B-lymphocytes

a substance capable of inducing a specific immune response is

an antigen

establishment and multiplication in/on the body of a microorganism without producing any apparent or inapparent change is

colonization

deposition of microorganisms without multiplication is

contamination

The most common routes of entry are A: inhalation B: ingestion C: direct deposit

A only

The following is responsible for cell mediated immunity

TH1 cells

This cell decides whether cell mediated immunity or humoral immunity takes place

antigen presenting cells

Which is not an example of active immunization

none of the above

the mechanisms of antibiotic resistance include: A: alteration of drug target B: production of inactivating enzymes C: decreased antibiotic uptake

A, B, C

If the saffron step is omitted, gram positive bacteria and gram negative bacteria will appear and __ respectively under a light microscope

purple, colourless

Group A strep are

delta-hemolytic

clostridium species are unique because they

are anaerobic

clostridium tetani is transmitted through

skin trauma by any object contaminated with spores

the following causes bloody and mucoid diarrhea

E. coli O157:H7

the following causes malaria

plasmodium

this type of parasite can migrate to the brain

taenia solium

which of the following is false about parasite?

none of the above

in the Mantoux test tuberculin solution is injected

intradermal

syphillis is caused by

treponema pallidum

the levels of fungal infections in order are

superficial, cutaneous, subcutaneous, systemic

in the event that you find an aids patient infected with a fungal infection, what fungus would you suspect first?

cryptococcus