Exam 1: Bacteria Identification Gram + Flashcards
What are the 2 (Gram +) anaerobic cocci?
-Peptococcus
-Peptostreptococcus
Gram +, Aerobic, Cocci fall into which two categories?
Clusters (catalase +)
Pairs/Chains (catalase -)
A positive catalase test done on a Gram +, aerobic, cocci indicates what?
The bacteria forms clusters
A negative catalase test done on a Gram +, Aerobic, Cocci indicates what?
The bacteria forms pairs/chains
For Gram + Cocci, what are the 2 categories that bacteria who form aerobic clusters can fall into?
Coagulase + (bubbles)
Coagulase - (no bubbles)
Bubbles in a catalase test indicate what about the bacteria being tested?
Coagulase (+)
No bubbles in a catalase test indicate what about the bacteria being tested?
Coagulase (-)
A bacteria is Gram (+), Cocci, Aerobic, forms Clusters, and is Coagulase (+). What is it?
Staphylococcus aureus
A bacteria is Gram (+), Cocci, Aerobic, forms Clusters, and is Coagulase (-). What is it?
CoNS
(Staphylococcus epidermis/ coagulase-negative staphylococcus)
Gram (+), Aerobic, Cocci, who form Pairs/Chains fall into what 3 categories?
alpha-hemolysis (partial)
beta-hemolysis (full)
gamma-hemolysis (nonhemolytic)
A Gram (+), Cocci who forms Pairs/Chains demonstrates PARTIAL HEMOLYSIS.
What group does this cocci fall into?
alpha-hemolysis
A Gram (+), Cocci who forms Pairs/Chains demonstrates FULL HEMOLYSIS. What group does this cocci fall into?
beta-hemolysis
A Gram (+), Cocci who forms Pairs/Chains demonstrates NO HEMOLYSIS. What group does this cocci fall into?
gamma-hemolysis
A Gram (+), Aerobic, Cocci, who is Catalase (-), demonstrates partial (alpha) hemolysis.
What 2 bacteria could it be?
-Streptococcus pneumoniae
-Viridans streptococci
A Gram (+), Aerobic, Cocci, who is Catalase (-), demonstrates full (beta) hemolysis.
What 2 bacteria could it be?
-Streptococcus pyrogenes (Group A)
-Streptococcus agalactiae (Group B)
A Gram (+), Aerobic, Cocci, who is Catalase (-), demonstrates no (gamma) hemolysis.
What 2 bacteria could it be?
-Enterococcus faecium
-Enterococcus faecalis
You receive a call from the microbiology lab informing you that patient JR has Gram positive cocci growing in the blood. They don’t have a full identification but tell you the organism is catalase positive, coagulase positive. Which of the following organisms could be growing in JR’s blood?
a) Staphylococcus aureus
b) Staphylococcus epidermidis
c) Streptococcus pyogenes
d) Enterococcus faecalis
A. Staphylococcus aureus
You receive a call from the microbiology lab informing you that patient ZE has Gram
negative rods growing in the blood. They don’t have a full identification but tell you the
organism is a non-enteric non-lactose fermenter. Which of the following organisms could
be growing in JR’s blood?
a) Pseudomonas aeruginosa
b) Citrobacter freundii
c) Morganella morganii
d) Aeromonas hydrophila
a. pseudomonas aeruginosa
Gram Positive Bacilli fall into what two categories?
Anaerobic
Aerobic
Both anaerobic and aerobic, Gram Positive Bacilli fall into which two categories?
Spore Forming
Non-Spore Forming
You have a Gram (+), Anaerobic, Bacilli that forms spores. What 2 bacteria could it be?
Clostridium spp.
Clostridium difficile
You have a Gram (+), Anaerobic, Bacilli that does not form spores. What 2 bacteria could it be?
Cutibacterium
Actinomyces
You have a Gram (+), Aerobic, Bacilli that forms spores. What bacteria is it?
Bacillus spp.
You have a Gram (+), Aerobic, Bacilli that does not form spores. What 3 bacteria could it be?
Corynebacterium
Lactobacillus spp.
Listeria monocytogenes
