Gram Positive Bacilli Flashcards
Catalase Positive
LBC
Listeria
Bacillus
Corynebacterium
Catalase Negative
WELGA
Weisella
Erysipelothrix
Lactobacillus
Gardnerella
Arcanobacterium
Spore formers
Bacillus
Clostridium
Branching/Fungus Like
Actinomyces
Nocardia
Gram positive Bacilli
Aerobic
Catalase positive
forms central spors
Bacillus
Most virulent, agents of anthrax
B. anthracis
3 forms of anthrax
- Cutaneous anthrax
- Woolsorter’s disease / Pulmonary anthrax
- Gastrointestinal anthrax `
Form of anthrax that is common and less severe
Cutaneous anthrax
Form of anthrax that is rare but severe
Gastrointestinal anthrax
Colonies: Medusa Head
Arrangement: Bamboo pole
MHA: Strings of pearls
B. anthrax
Bacillus associated with food poisoning; food or milk, rice
B. cereus
Colonies: Feathery
B.cereus
Bacillus cereus:
Emetic
Vomiting after 1-4 hrs
Bacillus cereus:
Diarrheic
18-24 hrs
Differentiate Anthrax and Cereus:
Motility
Hemolysis
Non motile
Gamma hemolytic
Medusa Head
B. anthrac
Motile
Beta hemolytic
Feathery
B. cereus
Causes Myenocrosis (Gas gangrene) and Food Poisoning
Box car colonies
Double Hemolysis
C. perfringens
Forms spores (anaerobically)
Catalase negative
Clostridrium
All clostridium are anaerobic except for
C. pefrigens (microaerotolerant)
Reverse Camp’s Test (+) Enhanced hemolysis
Naegler Reaction (+) opaque on non-toxin
C. perfringens
- Lipase Test (+)
- Tennis Racket Appearance
- Irradescent sheen EYA
C. botulinum
Irradescent Sheen on EYA
Flaccid paralysis
Strabismus eyes
C. botulinom
produces tetanospasmin
Beta-hemolytic
Spastic contractions/Lock jaw
TERMINAL SPORES(LOLLIPOP)
C. tetani
Pseudomembranous collitis
CCFA
Yellow colonies CHARTREUSE FLUORESCENE
HORSE BARN YARD ODOR
C. difficile
Associated with malignancies (colorectal cancer)
Beta hemolytic
SWARMING
C. septicum
