Upgrade to remove ads
Only $35.99/year

MLT 141 Unit 6 SQ Chapters 26 -30

Terms in this set (21)

A yellow-pigmented, gram-negative rod on blood agar that is oxidase-positive, motile by wet mount, and has the ability to oxidize glucose, xylose, and sucrose is most likely which of the following?
Sphingomonas
Oxidase-positive, glucose-positive (oxidatively) gram-negative bacilli that cannot grow on MacConkey agar include:
Sphingomonas.
Which of the following statements best describes the habitats of Sphingobacterium, and Sphingomonas?
Habitats are unknown.
Although no definitive guidelines are available for the treatment of Sphingomonas paucimobilis infections, which antibiotic appears to have potential activity against this organism?
Trimethoprim-sulfamethoxazole combination
This bacterium is unique in that it does not possess a flagellum but is motile by gliding motility.
Sphingobacterium spp.
Sphingobacterium and Spingomonas spp. have been isolated from all of the following except:
body fluids
True cocci, such as most Neisseria spp. and Moraxella catarrhalis, can be differentiated from morphologically similar Moraxella species by:
subjecting the bacterium to noninhibitory concentrations of penicillin.
The species of Moraxella that is most commonly associated with human infections, primarily of the respiratory tract, is:
M. catarrhalis.
In Gram-stained preparations, M. lacunata will appear as:
coccobacilli or medium-sized rods.
Testing for differentiation of M. nonliquefaciens and M. osloensis can best be performed by:
the ability to utilize acetate.
Testing for differentiation of M. lacunata from other Moraxella species can best be performed by:
the ability to liquefy serum.
Of the asaccharolytic, oxidase-positive bacilli that do not grow on MacConkey agar, which one of the following organisms is generally associated with mixed infections resulting from bites or clenched-fist wounds?
Eikenella corrodens
Which of the following organisms is negative for catalase, indole, and arginine dihydrolase tests and pits the agar on a sheep blood agar plate?
E. corrodens
E. corrodens can be easily recognized in culture by its:
bleachlike odor.
Although most other clinically relevant gram-negative bacilli are intrinsically resistant to penicillin, it is the drug of choice for infections involving:
Pasteurella multocida.
Which of the following bacterial species is part of both domestic and wild animal microbiota and transmitted to humans during close animal contact, including bites?
P. multocida
Gram-stain morphology in this genus may appear as short, straight bacilli or coccobacilli with bipolar staining.
Pasturella
Of the following organisms, which one is among the Aggregatibacter aphrophilus, Aggregatibacter actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, and Kingella spp. (HACEK) group of organisms that cause slowly progressive bacterial endocarditis?
A. actinomycetemcomitans
Kingella spp. can be distinguished from Neisseria spp. by its:
negative test for catalase.
Which organism can cause granulomatous disease in animals and has been associated with soft-tissue infection in humans after animal bites?
Actinobacillus spp.
K. denitrificans, which is nonhemolytic and tends to pit the agar, also grows on selective media that support the growth of which gram-negative diplococci?
N. gonorrhoeae
Other sets by this creator