Session 11 - Streptococci Flashcards
What is the gram stain of streptococci?
Gram positive
What are the 3 types of streptococci?
Alpha haemolysis
Beta haemolysis
Non-haemolytic
What kind of bacteria is streptococcus pyogenes?
Lance field group A beta haemolytic streptococcus
What is streptococcal pharyngitis caused by?
Infection caused by streptococcus pyogenes
WhT is the mode of transmission of streptococcal pharyngitis?
Droplet spread
What are 4 clinical features of streptococcus pyogenes?
Abrupt onset sore throat
Malaise
Lymphoid hyperplasia
Tonsillopharyngeal exudate
What are the 4 complications of streptococcal pharyngitis?
Scarlet fever
Suppurative complications
Acute rheumatic fever
Acute post-streptococcal glomerulonephritis
What is scarlet fever caused by?
Infection with streptococcal pyrogenic exotoxin stain of S. Pyogenes
What is 4 symptoms of streptococcal pharyngitis?
High fever
Sepsis
Arthritis
Jaundice
What is suppurative complications?
Pus related complications
What is acute rheumatic fever?
Inflammation of heart, joints, CVS following on from pharyngitis
What is acute post-streptococcal glomerulonephritis?
Acute inflammation of renal glomerulus
What are 4 streptococcus pyogenes skin infections?
Impetigo
Erysipelas
Cellulitis
Necrotising fasciitis
What is impetigo?
A childhood infection - initial skin colonization, then intradermal innoculation
What is erysipelas?
Dermis infection with Lymphatic involvement in fade and lower limbs
