Misc GN orgs-- Special GNB Flashcards
Which GNB organisms are special?
Pasturella
Aeromonas
Plesiomonas
What is special about the special GNB?
These have super power! They can ferment and are oxidative!
They are all indole and oxidase positive and will grow on routine media, but Pasteurella won’t grow on MAC.
Will Pasteurella grow on MAC?
NO.
What air is Pasteurella fond of?
facultative anaerobe
Is Pasteurella motile?
Non-motile
Gram stain Pasteurella?
Small poor staining GNB with bipolar staining
Pasteurella growth on BAP?
“Musty” smell with small transluscent colonies
What disease does Pasteurella cause?
Pasteurellosis–usually seen as cellulitis
What are the MC Pasteurella infections?
Wound infections
caused by P. multocida
Does Pasteurella grow on MAC?
Yes
Pasteurella Indole reaction?
Positive
Pasteurella Oxidase reaction?
Positive
Aeromonas oxidase reaction?
positive
Aeromonas indole reaction?
positive
Is Aeromonas fermentative?
Yes.
Ferments glucose.
Aeromonas environment?
Natural habitat is freshwater and seawater
Does Aeromonas grow on routine lab media?
Yes, including MAC
Aeromonas on BAP?
yes and Beta hemolytic
What disease does Aeromonas cause?
Cellulitis and wound infection Septicemia GI infections UTIs Ear infections
Aeromonas acquired by?
contact with contaminated water or soil
Plesiomonas environment?
Natural habit is water and soil
carried by many cold-blooded animals
Plesiomonas oxidase reaction?
positive
Plesiomonas indole reaction?
positive
Does Plesiomonas grow on routine media?
Yes
Plesiomonas environment?
Natural habitat is water and soil
What disease does Plesiomonas cause?
Gastrointestinal disease
Plesiomonas acquired by?
Humans acquire through ingestion of contaminated food
