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.
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.
- 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:
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.