5 Questions
What kind of media is required for the growth of Streptococcaceae family members?
Media enriched with blood, serum, or ascitic fluid
Which classification system divides streptococci into obligate anaerobes and aerobes or facultative anaerobes?
Cultural character-based classification
What are streptococci classified as based on their hemolytic property on blood agar plates?
Aerobic or facultative anaerobic streptococci
Why is morphological classification of streptococci not considered satisfactory?
Length of chain depends on the medium and several other factors
How are long-chain streptococci typically classified?
Pathogenic strain
Study Notes
General Characters of Streptococci
- Belong to the Streptococcaceae family
- Gram-positive cocci arranged in chains
- Non-motile and non-sporing
Growth Requirements
- Fastidious microorganisms
- Require media enriched with:
- Blood
- Serum
- Ascitic fluid for growth
Classification of Streptococcus
Morphological Classification
- Classified into:
- Long chain (pathogenic strain)
- Short chain (non-pathogenic)
- Not a satisfactory method due to:
- Chain length dependent on growth medium
- Other factors influencing chain length
Classification based on Cultural Characteristics
- Divided into:
- Obligate anaerobes (Peptostreptococci)
- Aerobes or facultative anaerobes
- Aerobic or facultative streptococci further classified based on:
- Hemolytic property on blood agar plate
This lecture covers the general characteristics and classification of Streptococcus, a type of Gram-positive cocci. It includes their growth requirements and different systems of classification.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
