F, Lec (aeromonas20) Flashcards
(27 cards)
Aeromonas consists of
ubiquitous, oxidase-positive,
glucose-fermenting, gram-negative rods
distributed in freshwater, estuarine, and marine environ-
ments worldwide.
Aeromonas
are straight rods
Aeromonads
Mesophilic three different complexes or groups of specie of aeromonase
Aeromonas hydrophila complex, aeromonas vernonii complex, aeromonas caviae complex
mesophilic group (optimal growth around
37C
psychrophilic
group (optimal growth around
22C
T or F All mesophilic groups are motile
TRue
They are all motile
by means of
Single polar flagellum
psychrophilic group consists of only one species
Aeromonas salmonicida
Is A. salmonicida is motile or non motile
Nonmotile
Diagnositic stage for intestinal infectiojs
Organisms in stool specimens
Five diarrheal presentations
- An acute, secretory diarrhea often accompanied by
vomiting - An acute, dysenteric form of diarrhea (similar to shigel-
losis), with blood and mucus - A chronic diarrhea usually lasting more than 10 days
- A cholera-like disease, including rice water stools
- The nebulous syndrome commonly referred to as traveler’s
diarrhea (similar to enterotoxigenic E. coli).
T or F most cases are self limiting
True
Referred to as travelers diarrhea
Nebulous syndrome
species most frequently associated with gas-
trointestinal infections,
Aeromonas caviae
responsible for extraintestinal infections;
septicemia, meningitis, and wound infections
Aeromonads
Appear as ______ on surface
large, round, raised, opaque colonies with an entire
edge and a smooth, often mucoid,
Extreme ______ is present
Odor
pigmentation ranges from
translucent and white to buff-colored.
aeromonads ferment
Lactose
Aeromonas will form _________ colonies
Pink centered
separate the oxidase-positive aeromonads
from the oxidase-negative yersinias.
oxidase test performed on SBA
colonies
Combined use of _______ has the highest recovery of aeromonads
ampicillin SBA and a modified CIN II
plate
