Pneumococcus Bacteria Questions and Answers

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Pneumococcus Short Essays

Question 1. Morphology and cultural characteristics of pneumococci.
Answer:

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).
Answer:

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.
Answer:

Pneumococcus Cultural characteristics

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

Pneumococcus Differences between pneumococci and streptococcus viridians

Question 4. Media used for gonococci.
Answer:

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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