Pneumococcus Bacteria

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.

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Pneumococci  Cultural Characteristics:

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

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.

• C-reactive protein is not an antibody produced as a result of pneumococcal infection but it is an acute phase substance produced in hepatocytes.
• C-Reactive Protein appears in.
  • Acute sera of cases of pneumonia.
  • Some other pathological conditions.
• C-Reactive Protein disappears during convalescence.

C-Reactive Proteins Production:

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

C-Reactive Proteins Use:

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

C-Reactive Proteins Test:

• C-Reactive Proteins are tested by passive agglutination using latex particles coated with an anti-CRP antibody.

Question 2. Lab investigations of pneumococci.
Answer:

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

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.