Bacterial biochemical test patterns

Demonstrate how each organism reacts with each test
Quiz by electronicmayhem
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Last updated: August 22, 2014
First submittedAugust 20, 2014
Times taken28
Average score31.3%
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most test answere will be pos/neg. morphology is coccus, bacillus, branching filamentous, antibiotics are resistant or susceptible. oxygen requirements are obligate aerobe/anaerobe, facultative a/an, or microaerophillic.
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Organism
Hint
Answer
Staphylococcus aureus
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
pos
 
coagulase
pos
Staphylococcus epidermidis
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
pos
 
coagulase
neg
 
oxidase
neg
 
novobiocin
susceptible
Staphylococcus saprophyticus
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
pos
 
coagulase
neg
 
oxidase
neg
 
novobiocin
resistant
Micrococcus spp.
gram
pos (variable)
 
morphology
coccus
 
oxygen requirement
obligate aerobe
 
catalase
pos
 
oxidase
pos
 
bacitracin
susceptible
 
furazolidone
resistant
Peptostreptococcus spp.
gram
pos
 
morphology
coccus
 
oxygen requirement
obligate anaerobe
Streptococcus pyogenes (Lancefield group A)
gram
pos
 
mrophology
coccus
 
oxygen requirement
microaerophile
 
catalase
neg
 
hemoylsis pattern
beta
 
bacitracin
susceptible
 
PYR
pos
Streptococcus agalactiae (group B)
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
neg
 
hemolysis pattern
beta
 
bacitracin
resistant
 
PYR
neg
 
CAMP
pos
 
Hippurate
pos
Streptococcus pneumoniae
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
neg
 
hemolysis pattern
alpha
 
optochin
susceptible
viridans group Streptococcus spp.
gram
+
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
neg
 
hemolysis pattern
alpha
 
optochin
resistant
Enterococcus faecium (group D)
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
neg
 
hemolysis pattern
gamma (sometimes alpha)
 
bile-esculin
pos
 
PYR
pos
 
growth in NaCl at 37C
pos
 
arabinose
pos (yellow)
Enterococcus faecalis (group D)
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
neg
 
hemolysis pattern
gamma (sometimes alpha)
 
bile esculin
pos
 
PYR
pos
 
growth in NaCl at 37C
pos
 
arabinose
neg (purple)
Streptococcus bovis (group D)
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
catalase
neg
 
hemolysis pattern
gamma (sometimes alpha)
 
bile esculin
pos
 
PYR
neg
 
growth in NaCl at 37C
neg
Nocardia spp.
gram
pos (weak)
 
morphology
beaded, branching filamentous bacilli
 
oxygen requirement
obligate aerobe
 
acid fast stain
partial
 
catalase
pos
Actinomyces spp. (israeilii)
gram
pos
 
morphology
branching filamentous bacilli
 
oxygen requirement
facultative anaerobe (grows best anaerobic)
 
acid fast stain
neg
Bacillus anthracis
gram
pos (variable)
 
morphology
bacillus
 
oxygen requirement
facultative anaerobe
 
spore formation
yes
 
motility
no
 
hemolysis pattern
gamma
 
catalase
pos
Bacillus cereus
gram
pos
 
morphology
bacillus
 
oxygen requirement
facultative anaerobe
 
spore formation
yes
 
motility
yes
 
hemolysis pattern
beta
Listeria monocytogenes
gram
pos
 
morphology
bacillus
 
oxygen requirement
facultative anaerobe
 
spore formation
no
 
hemolysis pattern
beta (narrow zone)
 
motility
yes (tumbling)
 
catalase
pos
 
CAMP
pos
 
hippurate
pos
 
growth at 4-10C
pos
Erysipelothrix rhusiopathiae
gram
pos
 
morphology
coccus
 
oxygen requirement
facultative anaerobe
 
spore formation
no
 
catalase
neg
 
oxidase
neg
 
TSI
H2S production
 
motlity
no
Corynebacterium diphtheriae
Gram
pos
 
morphology
bacillus (clubbed)
 
oxygen requirement
facultative anaerobe
 
spore formation
no
 
catalase
pos
 
motility
no
 
selective growth medium
tellurite/tinsdale (black colonies with a brown halo)
Clostridium spp. (diphtheriae, tetani, botulinum, perfringens)
gram
pos
 
morphology
bacillus
 
oxygen requirement
obligate anaerobe
 
spore formation
yes
+1
Level 80
Jul 27, 2017
Good quiz, but it completely ignores the Enterobacteraceae, a very large and very clinically significant family that includes (but is not limited to) Escherichia (E. coli), Salmonella, Shigella, Serratia, Klebsiella, Proteus, Enterobacter, Citrobacter and Yersinia (Y. pestis being the presumed cause of the dreaded, deadly plague in the middle ages). Also missing are such clinically significant genus/species such as Neisseria and Pseudomonas.
+1
Level 34
Sep 14, 2018
Correct. It does ignore everything you mention. However, you should have noticed that this is ONLY gram positive organisms. I built it to study Gram pos organisms. In retrospect, it's not that useful in learning it.

Dr. E