Microbiology In Upper GI Tract (Quiz) Flashcards
(47 cards)
is Bacteroides anaerobic or aerobic
- anaerobic
is Acitnomyces anaerobic or aerobic
- anaerobic
is Clostridium anaerobic or aerobic
- anaerobic
what is the most common cause of infectious esophagitis
often associated with
what is its aerobic status
- Candida albicans
- uncontrolled HIV or immunocompromisation
- facultative anaerobe
which are greater in number, aerobes or anerobes
- anaerobes
- >1000:1
which are the prominent phyla of anaerobes in the GI Tract
- bacteroidetes
- firmicutes
most anaerobic infections are
- mixed infections containing both anaerobic and aerobic bacteria
plaque is composed of
what do they secrete
- bacterial biofilms
- exopolysaccharides
which bacteria causes SUPRAgingival plaque associated biofilm
- actinomyces
A IN SUPRA STARTS THE A HERE
which bacteria causes SUBgingival plaque associated biofilm
- Bacteroides
B IN SUB STARTS THE B HERE
classification of bacteroides
- gram negative
- non-spore forming
- anaerobic
- bacilli
Bacteroides found where
- oropharynx
- intestinal tract
- female genital tract
what is the most predominant bacteria found in the GI tract
esp
- Bacteroides
- B. fragilis
what is the most common genus isolated from anaerobic infections
what specific bug
- Bacteroides
- B. fragilis
for bacteroides to cause disease, what is required
- breach of epithelial cell barrier allowing access to deeper tissues.
- unable to invade cells or tissues itself
- requires synergy with other bacteria
classification of Actinomyces species
- gram positive
- non-spore forming
- anaerobic
- bacilli
Actinomyces is usually associated with
why
are adults or children more affected
- following dental procedures (odontogenous)
- part of normal oral flora
- adults more than children
Actionmyces Israelii causes
characteristics of infection
treatment
- lumpy jaw
- abscesses, mass lesion, or swelling of soft tissues
- sulfur granules drained from them
- long term antibiotic therapy
clostridium is part of what phylum
full classification of clostridium
- Firmicutes
- gram positive
- spore forming
products of clostridium fermentation have what characteristic
- foul odor
which clostridia are associated with gas gangrene
how can they spread
- perfringens
- septicum - spread via bloodstream
which clostridia are associated with food poisoning and wound infection
- botulinum
which clostridia are associated with antibiotic- associated diarrhea and colitis
- difficile
endotoxins are part of what type of bacteria
how so
- gram negative
- part of LPS (lipid A + polysaccharide)
