Microbiology2 Flashcards
Rusty sputum associated with
Strep pneumoniae
Streptococcus pneumoniae most common cause of
Meningitis
Otitis media
Pneumonia
Sinusitis
MOPS
Optochin sensitive
Optochin negative
Sensitive: strep pneumoniae
Not: strep viridans
No virulence without capsule
Strep pneumoniae
Optochin sensitivity differentiates between
Resistant: strep viridans
Sensitive: strep pneumoniae
Both are alpha hemolytic
Group A strep
Pyogenes
S. Pyogenes can cause:
Pyogenic: pharyngitis, cellulitis
Toxigenic: scarlet fever, toxic shock like syndrome
Immunologic: rheumatic fever, acute glomerulonephritis
Rheumatic fever can be caused by
Strep pyogenes
Specifically, Ab against M protein of pyogenes
Criteria for diagnosis of rheumatic fever
JONES
Group B strep
Agalactiae
Pneumonia, meningitis, sepsis In babies ( group B strep for Babies)
Group D strep
Enterococcus faecilus
Bovis
ABCDEFG
ADP-ribosylation (of RF-2) Beta-prophage (encodes exotoxin) Corynebacterium Diphtheria (G+) Elongation factor 2 Granules
Spore forming G+ bacteria
Bacillus Anthracis
Clostridium perfringens
C. Tetani
C. Botulinum
Pulmonary anthrax aka
Woolsorter’s disease
Flu-like, fever, pulmonary hemorrhage, mediastinitis
Symptom of cutaneous anthrax
Black eschar skin lesions
Reheated rice syndrome caused by
Bacillus cereus
Listeria monocytogenes
Symptoms
Amnionitis Septicemia Spontaneous abortion Neonatal septicemia Self limiting gastroenteritis
Actinomyces symptoms and treatment
Facial and oral abscess and sulfur granules
Penicillin
Nocardia
Pulmonary infection in immunocompromised
Cutaneous infection after trauma in immunocompetent
Treat with sulfonamides
Four possible progressions of primary tuberculosis
- Heals by fibrosis, tuberculin positive
- Progressive lung disease in immunocompromised, death
- Severe bacteremia, leading to miliary TB and death
- Lymphatic or hematogenic dissemination, reactivation later
Vertebral extrapulmonary TB called
Pott’s disease
Leprosy also known as
Hansen’s disease
More severe form of leprosy
Characterized by what type of immune response
Largely Th1 humoral response
Low cell mediated response
This is the infectious kind (lepromatous)
Less severe kind of leprosy characterized by what type of immune response
Tuberculoid: high cell mediated, Th1 type immune response
