MDS PREP
What is the typical macroscopic appearance of the stool in cases of amoebic dysentery compared to bacillary dysentery?
1) Amoebic dysentery stool is small and odorless, while bacillary dysentery stool is copious and offensive.
2) Both amoebic and bacillary dysentery stools are copious and offensive.
3) Amoebic dysentery stool is dark red and acidic, while bacillary dysentery stool is bright red and alkaline.
4) Amoebic dysentery stool is bright red and alkaline, while bacillary dysentery stool is dark red and acidic.
General Microbiology Answer: 3
Amoebic dysentery stool is typically dark red and acidic, while bacillary dysentery stool is bright red and alkaline.
The best method of storing sterile instruments is to
1. place items in chemical disinfecting solution until ready to use
2. keep the items in the same pack ages as were prepared for sterilization
3. leave packages in autoclave for temporary storage
4. keep items between sterile towels in a dust free dental cabinet
Microbiology
Answer: 2
A positive character of the phenol disinfectant is, that it
1. has a cumulative effect with repeated usage
2. is very effective against Mycobacterium tuberculosis
3. leaves the skin oils intact
4. kills hepatitis viruses
Microbiology
Answer: 1
Practical methods of sterilization that are in general use in hospitals and clinics are
1. gas sterilization
2. autoclaving
3. dry heat sterilization
4. all of the above
Microbiology
Answer: 4
which of the following is true regarding the pathogenicity of the mycobacterium species:
1 M. tb is more pathogenic than m.bovis to humans
2 M.kansaaii can cause disease indistinguishable from tuberculosis
3 M.africanum is acquired from the enviourmenatal source
4 M.marinum is responsible for tubercular lymphadenopathy
Microbiology
Answer: 1
When a diagnostic test is used in "series" mode, then:
1. Sensitivity increases but specificity decreases.
2. Specificity increases but sensitivity decreases.
3. Both sensitivity and specificity increase
4. Both sensitivity and specificity decrease