Bacteria Flashcards
gram staining process acronyms
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outline gram staining process
- fixation 2. add crystal violet 3. Add iodine 4. Decolourise with alcohol until no more purple comes off the side 5. Add safranin (pink)
gram positive results
will stain purple due to sufficient peptidoglycan layer
gram negative results
will stain pink- insufficient peptidoglycan layer to retain safranin
Gram positive cocci’s
staplyloccocus
streptococcus
which test is used to differentiate straphyloccocus
coagulase
staphyloccus bacteria with a negative coagulase test
staphylococcus epidermidis
staphyloccus bacteria with a positive coagulase test
Staphylococcus aureus
which test is used to differnetiate streptooccus bacteria
Hemolysis
partial hemolysis
alpha
complete haemolysis
beta
no haemoloysis
Y- gamma
alpha streptococci
partial haemolysis
- Streptococcus pneumoniae
Beta streptococci
complete haemolysis
- streptococcus pyrogenes
gamma streptococci
no haemolysis
- Enterococci
streptococcus or staphyloccocus
Gram positive streptococcus
streptococcus or staphylococcus
gram positive staphylococcus
name 4 gram positive bacillus
clostridium
listeria
cornyebacterium
lactobacillus
name the gram negative cocci
nesseria meningitidis- diplococcus
name all gram negative bacillus
Legionella
Yersinia
Escherichia
Vibrio (comma shaped)
Salmonella
Helicobacter (comma shaped)
Shigella
Enterobacter
are gram negative bacteria usually cocci or bacillus
baciilus
are gram posiitve bacteria usually bacillus or rod
mixed
name me 3 encapsulated abcteria
–> which cause problems especially in patients with reduced spleen function
Neisseria meningitis
Haemophilus influenza
Streptococcus pneumoniae
