Streptococci Part II Flashcards
What is a sequela of S. pyogenes infections that affects the heart?
Rheumatic fever
Rheumatic fever can follow overt or subclinical pharyngitis in children and may lead to carditis, arthritis, chorea, and fever.
What are the potential consequences of rheumatic fever?
Carditis with extensive valve damage, arthritis, chorea, fever
These symptoms may arise following an infection with S. pyogenes.
What condition can result from S. pyogenes infections that affects the kidneys?
Acute glomerulonephritis
This condition may lead to nephritis, increased blood pressure, and occasionally heart failure.
What can acute glomerulonephritis become if chronic?
Kidney failure
Chronic conditions can develop from acute glomerulonephritis.
Fill in the blank: Rheumatic fever can lead to damage of the _______.
Mitral valve
Damage to heart valves, particularly the mitral valve, is a common complication.
True or False: Rheumatic fever can occur without prior pharyngitis.
True
It can follow overt or subclinical pharyngitis.
What are the symptoms of acute glomerulonephritis?
Nephritis, increased blood pressure, heart failure
Symptoms may vary in severity and can lead to chronic complications.
What is the relationship between S. pyogenes infections and rheumatic fever?
S. pyogenes infections can lead to rheumatic fever
This is particularly relevant in children following throat infections.
What is the scientific name of Group B strep?
Streptococcus agalactiae
What is the shape and arrangement of Streptococcus agalactiae?
Round/ovoid in chains and pairs
What is the Gram status of Streptococcus agalactiae?
Positive
What are the structural features of Streptococcus agalactiae?
Capsules, no flagella or endospores
Describe the colony morphology of Streptococcus agalactiae.
Small and white; grow poorly on normal media
What is the optimum temperature for the growth of Streptococcus agalactiae?
20 - 35°C
What are the oxygen requirements for Streptococcus agalactiae?
Facultative anaerobe
