Enterobacteriaceae are gram positive - T/F
False- they are gram negative
Where do enterobacteriaceae reside mostly?
The GI tract of humans and animals, present in water and soil environment
What are the benefits?
- Microbial antagonism
- Breakdown and absorption of the food
- Waste processing
- Vitamin K production
Remember what is the important aspects of Gram -negative bacteria?
LPS, Lipid A (pathogenesis), outer membrane
Characteristics of Entero?
- Gram - negative
- Facultative anaerobic
- Rods or coccobacilli
- Oxidase negative
* *Plesiomonas and shegelloids are not oxidase negative
What are Coliform bacteria? Name 3
- They are lactose positive bacteria
1. E.coli
2. Klebsiella
3. Enterobacter
What is Coliform enumeration?
A test to evaluate fecal/ sewage contamination
_______ are a better indicator of health risk in salt and fresh water and are more species specific which allows detection of source of contamination
Enterococci
What bacteria fall under the Enterobacteriaceae heading?
- Escherichia
- Salmonella
- Yersinia
- Shigella
- Klebsiella
- Proteus
- Citrobacter
- Serratia
What is the only clinically relevant species known of Escherichia?
Escherichia coli
What is a serotype? (OHFK)
complete antigenic formula of an organism O= O antigen H= flagella F= fimbriae K= capsule
Pathotypes: enteric pathotypes
List of acronyms
ETEC
enterotoxigenic
EHEC
enterohemorrhagic
VTEC/STEC
verotoxigenic/shiga-like toxic
EPEC
enteropathogenic
RPEC
rabbit pathogenic
EAEC
enteroadherent
DAEC
diffusely adherent
EIEC
enteroinvasive
EAggEC
enteroadherent aggregative
