Mycobacterial Diseases (respiratory pathology)

Question 1

What is mycobacteria?

Answer 1

• slender bacillus
• usual waxy cell wall due to high lipid content
• slow growing

Question 2

What stains are used for mycobacterium?

Answer 2

• Ziehl Neelsen (ZN)
• Phenol auramine

(doesn’t take up gram stains)

Question 3

what disease is associated with M.bovis?

Answer 3

Tuberculosis in cattle

Question 4

what disease is M.marinum associated with?

Answer 4

fish tank granuloma

Question 5

What disease is M.avium and M.Kansasii associated with?

Answer 5

HIV

Question 6

What is the most common site for primary tuberculosis?

Answer 6

Periphery of lung midzone

Question 7

when is tuberculosis reactivated?

Answer 7

1) lowered immunity
2) over 50yrs
3) Malnuitrition
4) alcoholism
5) Debilitating illness
6) HIV
7) chronic renal failure

Question 8

what are the sites of infection of TB? (except lung)

Answer 8

1) lymph nodes
2) kidneys
3) bone
4) intestines
5) brain
6) pericardium

Question 9

when should sputum specimens be collected from TB patients?

Answer 9

3 specimens, 8 hours apart. One should be ealy in the morning

Question 10

What is mantoux test?

Answer 10

tuberculosis sensitivity test