This is a short video on bacterial infections of the GI tract. This video includes the most common bacterial infections EXCEPT Helicobacter pylori and Clostridium difficile.
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ADDITIONAL TAGS:
organism
subclass/toxin
classification
mode of disease
reservoir
symptoms
treatment
other info
Salmonella enterica
serovar Typhi (Typhoid fever)
gram neg, lac neg; low infx dose
enteroinvasive, disseminates
obligate human pathogen
gastroenteritis, progressive fever, sweating
fluoroquinolone, cephalosporin (not smx/tmp, ampicillin, chloramphenicol)
vaccines available, but not in the US
other serovars (non Typhi)
gram neg, lac neg; high infx dose
enteroinvasive, doesn't disseminate
zoonotic
diarrhea, cramps, vomiting, fever, intestinal inflam
abx not necessary
Shigella (shigellosis)
species sonnei, flexneri, dysenteriae
gram neg, lac neg; very low infx dose
enteroinvasive
human-to-human only
mild diarrhea to dysentery; ab pain; cramps; n/v; blood/pus in stool; fever
rehydration, maybe abx
Shiga toxin in S dysenteriae and EHEC is enterotoxin, blocks glu absorption, A+B subunits → HUS
Campylobacter
species jejuni
gram neg, corkscrew-rod, microaerophilic; low infx dose
enteroinvasive
zoonotic
inflammatory diarrhea, bloody diarrhea, fever, cramping
rehydration, maybe abx
Most common bacterial diarrheal disease
Listeria (listeriosis)
species monocytogenes
gram pos, motile rod
enteroinvasive
zoonotic
vomiting, fever, muscle aches in mothers; CNS infection in neonates
rehydration, maybe abx
Often contaminates dairy and processed meats; pregnant women have mild symptoms but pregnancy complications
Vibrio cholerae
cholera toxin
gram neg, facultative anaerobe
enterotoxigenic
water, shells or marine animals, doesn't infect animals
watery "rice water" stool diarrhea; can lead to hypovolemic shock, hypokalemia in 2-3 days
oral rehydration
A+B toxin activates adenylate cyclase which secretes ions and water
Escherichia coli
ETEC, EPEC, EIEC, EHEC
gram neg, lac pos, facultative anaerobe
enterotoxigenic, enteropathogenic, enteroinvasive, enterohemorrhagic
ETEC and EIEC are humans only
gastroenteritis: n/v/d, cramps, ab pain, indigestion
rehydration
ETEC is cholera-like illness; EHEC is EPEC with Shiga toxin
Bacterial infections of the GI tract
Bacterial infections of the GI tract
organism
subclass/toxin
classification
mode of disease
reservoir
symptoms
treatment
other info
Salmonella enterica
serovar Typhi (Typhoid fever)
gram neg, lac neg; low infx dose
enteroinvasive, disseminates
obligate human pathogen
gastroenteritis, progressive fever, sweating
fluoroquinolone, cephalosporin (not smx/tmp, ampicillin, chloramphenicol)
vaccines available, but not in the US
other serovars (non Typhi)
gram neg, lac neg; high infx dose
enteroinvasive, doesn't disseminate
zoonotic
diarrhea, cramps, vomiting, fever, intestinal inflam
abx not necessary
Shigella (shigellosis)
species sonnei, flexneri, dysenteriae
gram neg, lac neg; very low infx dose
enteroinvasive
human-to-human only
mild diarrhea to dysentery; ab pain; cramps; n/v; blood/pus in stool; fever
rehydration, maybe abx
Shiga toxin in S dysenteriae and EHEC is enterotoxin, blocks glu absorption, A+B subunits → HUS
Campylobacter
species jejuni
gram neg, corkscrew-rod, microaerophilic; low infx dose
enteroinvasive
zoonotic
inflammatory diarrhea, bloody diarrhea, fever, cramping
rehydration, maybe abx
Most common bacterial diarrheal disease
Listeria (listeriosis)
species monocytogenes
gram pos, motile rod
enteroinvasive
zoonotic
vomiting, fever, muscle aches in mothers; CNS infection in neonates
rehydration, maybe abx
Often contaminates dairy and processed meats; pregnant women have mild symptoms but pregnancy complications
Vibrio cholerae
cholera toxin
gram neg, facultative anaerobe
enterotoxigenic
water, shells or marine animals, doesn't infect animals
watery "rice water" stool diarrhea; can lead to hypovolemic shock, hypokalemia in 2-3 days
oral rehydration
A+B toxin activates adenylate cyclase which secretes ions and water
Escherichia coli
ETEC, EPEC, EIEC, EHEC
gram neg, lac pos, facultative anaerobe
enterotoxigenic, enteropathogenic, enteroinvasive, enterohemorrhagic
ETEC and EIEC are humans only
gastroenteritis: n/v/d, cramps, ab pain, indigestion
rehydration
ETEC is cholera-like illness; EHEC is EPEC with Shiga toxin
Bacterial infections of the GI tract camera iphone 8 plus apk | |
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| Education YouTube Video Editor View attributions | Upload TimePublished on 28 Mar 2016 |
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