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39 Cards in this Set

  • Front
  • Back
Hyaluronic acid capsule is a characteristic of what organism?
Streptococcus pyogenes
What virulence factors are associated with Streptococcus pyogenes?
M protein (on fimbriae)
Group A-specific C-carbohydrate (composed of rhamnose and N-acetylglucosamine)
Protein F (mediates attachment to fibronectin in pharyngeal epithelium)
what is the reservoir for Streptococcus pyogenes?
human skin and mucosa only known reservoir
Labs for Streptococcus pyogenes?
gram-positive
bacitracin sensitive
catalase-negative
What are the major Gram-positive rods?
Clostridium (anaerobe)
Corynebacterium
Listeria
Bacillus
catalase positive
coagulase positive?
Stapylococcus aureus
catalase positive
coagulase negative
Novobiocin sensitive
Staphylococcus epidermidis
catalase positive
coagulase negative
Novobiocin resistant
Staphylococcus saprophyticus
labs for Staphylococcus aureus?
Gram positive
catalase positive
coagulase positive
labs for Staphylococcus epidermidis?
Gram positive
Catalase positive
coagulase negative
Novobiocin sensitive
labs for Staphylococcus saprophyticus?
Gram positive
Catalase positive
Coagulase negative
Novobiocin resistant
Staphylococcus are catalase ______
positive
Streptococcus species are catalase _____________
negative
Labs for Streptococcus pneumoniae
Gram positive cocci
Catalase negative
α-hemolitic
encapsulated (+ quelling)
Optochin sensitive
bile soluble
Labs for Viridans streptococci?
Gram positive cocci
Catalase negative
α-hemolitic
no capsule
Optochin resistant
not bile soluble
Labs for Streptococcus pyogenes?
Gram-positive cocci
Catalase negative
β-hemolytic
Bacitracin sensitive
Labs for Streptococcus agalactiae?
Gram-positive cocci
Catalase negative
β-hemolytic
bacitracin resistant
Labs for Enterococcus and Peptostreptococcus species?
Gram-positive cocci
Catalase negative
γ-hemolytic
How does the TSST-1 toxin exert it's effects?
Binds nonspecifically and activates T lymphocytes

(toxic shock syndrome toxin produced by Staphylococcus aureus - gram +, catalase-positive)
What is the major virulence factor of Staphylococcus aureus?
Protein A (binds Fc-IgG, inhibiting complement fixation and phagocytosis)
name two gram negative cocci
Neisseria meningitidis
Neisseria gonorrhoeae
how are Neisseria meningitidis and Neisseria gonorrhoeae differentiated?
Neisseria meningitidis is a maltose fermenter, Neisseria gonorrhoeae does not ferment Maltose
Maltose fermenting gram negative cocci
Neisseria meningitidis
non-maltose fermenting gram negative cocci
Neisseria gonorrhoeae
What are the main gram negative Coccoid rods?
Haemophilus influenzae
Pasteurella (animal bites)
Brucella (brucellosis)
Bordetella pertussis
fast lactose fermenting gram negative rods
Klebsiella
E. coli
Enterobacter
slow lactose fermenting gram negative rods
Citrobacter
Serratia
Gram negative rods
lactose nonfermenting
oxidase negative
Shigella
Salmonella
Proteus
Gram negative rods
lactose nonfermenting
oxidase positive
Pseudomonas
Labs for Neisseria meningitidis?
Gram negative cocci
maltose fermenter
Labs for Neisseria meningitidis?
Gram negative cocci
maltose nonfermenter
Labs for Haemophilus influenzae?
Gram negative coccoid rods
Labs for Bordetella pertussis?
Gram negative coccoid rods
Labs for Kebsiella?
Gram negative rods
fast Lactose fermenter
Labs for E. coli?
Gram negative rods
fast Lactose fermenter
Labs for Shigella?
Gram negative rods
Lactose nonfermenter
Oxidase negative
Labs for Salmonella?
Gram negative rods
Lactose nonfermenter
Oxidase negative
Labs for Proteus?
Gram negative rods
Lactose nonfermenter
Oxidase negative
Labs for Pseudomonas?
Gram negative rods
Lactose nonfermenter
Oxidase positive