Pneumococcus Bacteria Questions and Answers

Pneumococcus Short Essays

Question 1. Morphology and cultural characteristics of pneumococci.

Pneumococci Morphology:

  • Pneumococci are gram-positive, alpha-hemolytic organisms.
  • Size – small, 1 micrometer in diameter.
  • Shape – slightly elongated.
  • Each coccus has one end broad or rounded and other pointed.
  • They are arranged in pairs.
  • This shows a flame-shaped or lanceolate appearance.
  • They have large polysaccharide capsules.
  • They are non-motile and non-sporing.

Pneumococcus - Str. Pneumoniae in pus

Pneumococci  Cultural characteristics:

  • They are aerobes and facultative anaerobes.
  • The optimum temperature for growth is 37°C and pH 7.8

Pneumococcus Cultural characteristics

Pneumococcus Short Question And Answers

Question 1. C-reactive proteins (CRP).

C-reactive protein is an abnormal protein that precipitates with the somatic C antigen of pneumococci.

  • It is not an antibody produced as a result of pneuma- coccal infection but it is an acute phase substance produced in hepatocytes.
  • It appears in.
    • Acute sera of cases of pneumonia.
    • Some other pathological conditions.
  • It disappears during convalescence.

Read And Learn More: Microbiology Question and Answers

C-reactive proteins Production:

  • Its production is stimulated by.
  • Bacterial infections.
  • Inflammation.
  • Malignancies.
  • Malignancies.
  • Tissue destruction.

C-reactive proteins Uses:

  • As an index of the response of treatment in rheumatic fever.

C-reactive proteins Test:

  • It is tested by passive agglutination using latex particles coated with an anti-CRP antibody.

Question 2. Lab investigations of pneumococci.

Pneumococcus Cultural characteristics

Question 3. Mention the difference between pneumococci and streptococcus viridians.

Pneumococcus Differences between pneumococci and streptococcus viridians

Question 4. Media used for gonococci.

Gonococci are aerobic organisms.

  • They grow best at a temperature of 35 – 36oC in the presence of 5 – 10 % C02 and at pH 7.2 – 7.6
  • The cultural media used are

1. Enriched media.

  • It includes chocolate agar and blood agar media.
  • Colonies obtained are small, round, convex, grey, and translucent.

2. Selective media – Thayer Martin media.

  • It inhibits most contaminants.

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