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Mico Lab Midterm I
Terms in this set (33)
Characteristically pleomorphic and club-shaped, catalase +
Produces black colony surrounded by a brown halo on Tinsdale agar
The 5 beta-hemolytic gram + bacilli
Listeria monocytogenes, ar. haemolyticum, bacillus cereus, bacillus subtitles, and ar. pyogenes
The 3 catalase negative gram + bacilli
Ar. haemolyticum, erysipelothrix spp., and ar. pyogenes
Gram + bacilli, can produce a yellow pigment and is associated with neonatal meningitis UTI
Associated with alkaline encrusted cystitis
Causes diphtheria like disease, produces brown haloes on Tinsdale
Most human infections involve neonatal sepsis or meningitis, has umbrella shape with tumbling motility, is weakly beta hemolytic, catalase +, BEA +, H2S, URE, and NIT -
Occupational hazard for meat, poultry, and fish handlers, is NM, catalase -, H2S +, and has a "bristle" appearance in gelatin agar
Human infections with this gram + bacilli are associated with goat hair, colony morphology resemble a "medusa head", non-hemolytic, non-motile, gelatin -, capsule production in bicarbonate agar
Food poisoning, similar to Bacillus anthracis, usually B-H, motile, GEL +, and produces lecithinase on Egg Yolk agar
Toxin involved in food poisoning by Bacillus cereus that is associated with contaminated rice and vomiting
Toxin involved in food poisoning by Bacillus cereus that is associated with contaminated meat or sauce and diarrhea
Associated with agricultural animals, AIDS patients are particularly susceptible, may appear pale-pink salmon colored on culture media
Capsule stains __________ when treated with India ink and carbolfuchsin
Metachromatic granules are also known as this
Granules stained with the metachromatic granule stain appear what color
deep blue - violet
Spores are stained what color
Primarily causes spores to be heat resistant
Two gram + bacilli that may appear in chains
Bacillus spp. and Erysipelothrix spp.
All Enterobacteriaceae are
Gram-negative rods, nitrate positive, ferment glucose, oxidase negative, catalase positive
What reaction (slant / butt) will be produced in an LIA slant by an organism which is capable of deaminating lysine?
What reaction (slant / butt) will be produced on an LIA slant by an organism which is lysine decarboxylase positive but does not produce H2S?
What biochemical test can be used to differentiate Salmonella from Citrobacter?
In which biochemical test is Kovac's reagent used?
In which biochemical test is alpha naphthol used?
In which biochemical test is ferric chloride used?
Which is correct for the description "alkaline slant, acid butt, no H2S"?
Which of correct for the description "acid slant, acid butt, no H2S"?
Colonies growing on modified cefsulodin-irgasan-novobiocin (CIN) agar appear to be either Aeromonas spp. or Yersinia enterocolitica. Which test should be performed to differentiate between these two organisms?
The development of acute rheumatic fever and subsequent valvular heart disease are problems that may be encountered by patients infected with:
The Voges-Proskauer (VP) test detects which end product of glucose fermentation?
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