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Enterobacteriaceae 3/24
BBD Exam 1 - Dr. Courtney
41
Medical
Professional
04/10/2010

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Cards

Term
E. coli, Shigella, and Salmonella all cause disease in which system?
Definition
gastrointestinal
Term
are normal flora opportunistic?
Definition
they are ALWAYS opportunistic
Term
can E. coli infect the urinary tract?
Definition
YES!
Term
what gram stain do enterobacteriaceae have?
Definition
gram-
Term
what bacterial structre are H antigens found on?
Definition
Flagella
Term
where do you find K antigens?
Definition
on the capsule
Term
where do you find O antigens?
Definition
on the oligosaccharide associated with the LPS
Term
do enterobacteriaceae produce exotoxins?
Definition
yes
Term
where do you find Vi antigens?
Definition
capsule
Term
do enterobacteriaceae produce endotoxins?
Definition
Yes, they are Gram-, thus death = release of LPS
Term
can salmonella and e. coli be transmitted from animals to humans?
Definition
yes
Term
can shigella be transmitted from animals to humans?
Definition
NO--only humans to humans
Term
what type of infection (toxigenic vs. invasive) produces watery diarrhea?
Definition
toxigenic
Term
what type of infection (toxigenic vs. invasive) produces bloody diarrhea?
Definition
invasive
Term
is Shigella part of normal flora?
Definition
NO
Term
is E. coli part of normal flora?
Definition
yes
Term
which Shigella species is responsible for 80% of all Shigella infxns in the USA?
Definition
S. sonnei
Term
What is a Type III secretion system?
Definition
a protein with a syringe on it that can inject toxins into a cell that it attaches to.
Term
what is the name of the enterotoxin (exotoxin secreted in the intestines) that S. dysenteriae produces?
Definition
shiga toxin
Term
do you see bloody stools in shigella infections?
Definition
yes (you generally do)
Term
what does tenesmus mean?
Definition
painful straining to pass stools
Term
cramps, tenesmus, freq. small volume bloody mucoid fecal discharge are all indicative of what?
Definition
Dysentery syndrome
Term
does shigella have an animal reservoir?
Definition
just humans
Term
what are the two major classifications of Salmonella?
Definition
S. enterica (typhimuriam) and S. typhi
Term
is Salmonella part of the normal flora?
Definition
Nope.
Term
T/F: salmonella occurs naturally in many reptiles and doesn't make them sick
Definition
TRUE
Term
what is the leading cause of salmonella infection in industrial societies?
Definition
improper food handling
Term
T/F: centralized manufacturing and nationwide shipping cause widespread outbreaks.
Definition
so true.
Term
what bug causes Typhoid Fever?
Definition
Salmonella typhi
Term
Does S. typhi infect one or many organs?
Definition
many
Term
who is "typhoid mary" ?
Definition
cook who was immune and spread disease
Term
where can you isolate typhoid bacilli?
Definition
feces, blood, urine
Term
what virulence factors used by E. coli form the basis for their classification?
Definition
Enteropathogenic(EPEC), Enterotoxigenic(ETEC), Enterohemorrhagic(EHEC), Enteroaggregative(EAEC, Enteroinvasive(EIEC)
Term
during UTI with E. coli, what type of pili do the bugs have to prevent it from being voided?
Definition
P-pili (found in the uropathic strain)
Term
what is cystitis?
Definition
urinary tract infection
Term
where is EPEC's site of action?
Definition
small intestine
Term
what is the most often cause of traveler's diarrhea?
Definition
ETEC - enteropathogenic E. coli
Term
where is the site of action for ETEC?
Definition
small intestine
Term
what is the site of action for EHEC?
Definition
large intestine. (most common serotype is 0157:H7)
Term
where is the site of action for EAEC?
Definition
small intestine
Term
where is the site of action for EIEC and can it cause bacillary dysentery?
Definition
large intestine, and yes.
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