Bacteria review Flashcards
Staph. aureus has a superantigen (TSST-1: toxic shock syndrome 1), that cases toxic shock: binds to MHC II complex, to cause cytokine release: IL-1, TNF-a and INF-y=> SHOCK.
What other organism has a exotoxin superantigen that causes a similar phenomomen?
Strep. pyogenes
SpeA and C (Exotoxin a): IFN-y and TNF-a => Toxic LIKE shock syndrome: fever, rash and scarlet fever
What are our types of Gram + bacteria
- Coccus: Strep and staph
- Bacillus (rods)
Spore-forming rods: Bacillus and Clostridium
Non-sporeforming rods: Listeria and Cornyebacerium diptheria
What type of BACTERIA are
[Baccillus anthracis]
[Bacillus cereus]
Gram +
Bacillus: form rods
Spore-forming
Aerobes (need O2)
What type of BACTERIA are
[Clostridium dificile]
[Clostridium botulism]
[Clostridium tetani]
[Clostrium perfringes]
Gram +
Bacillus: rod forming
Spore forming
Aneroboes (cannot grow in )
What are our
Gram +
Non-spore forming rods (bacillus]?
- Listeria monocytogenes
2. Cornyebacterium diptheria
What bacteria forms rods that arrange in lines/ rows?
Bacillus anthracis
What is unique about Claustridium perfringes?
Undergoes alpha hemolysis, however, it will form a DOUBLE zone of hemolysis.
What is the only bacteria with a protein capsule, made of poly-D protein?
Bacilus anthracis
What bacteria causes Wool Sorters disease?
Baccilus anthracis: spores get stuck in wool of sheep => cause pulmonary anthracis => pulmonry hemorrhage
What are the 4 D’s of claustridium botulinism
Diplopia
Dysarthria
Dysphagia
Dyspnea
What is the only organism cultured on blood agar in an anaerobic environment?
Clostridium perfringes: alpha hemolytic, and form a double zone of hemolysis on agar
What is the only organism that can cause food poisoning in adults by ingestion of spores?
C. perfringes; however must germinate so the onset is SLOW
