ATI MICROBIOLOGY EXAM QUESTIONS WITH CORRECT (VERIFIEND) ANSWERS GRADED A+ YEAR 2023/2024 EXAM (UPGRADED) Chapter 27 - ANSWER -Sphingomonas paucimobilis and Similar Organisms When performing quality control on motility media, which of the following organisms should be used? - ANSWER -CDC group IIh and Acidovorax facilis Oxidase -positive, glucose -positive, (oxidatively) gram -negative bacilli that cannot grow on MacConkey agar include: - ANSWER -
Sphingomonas. A yellow -pigmented, gram -negative rod on blood agar that is oxidase -positive, motile by wet mount, and has the ability to oxidize gluc ose, xylose, and sucrose is most likely which of the following? - ANSWER -Sphingomonas Which of the following statements best describes the habitats of Acidovorax, Sphingobacterium, and Sphingomonas? - ANSWER -Habitats are unknown. Although no definitive g uidelines are available for the treatment of Sphingomonas paucimobilis infections, which antibiotic appears to have potential activity against this organism? - ANSWER -Trimethoprim -sulfamethoxazole combination Chapter 28 - ANSWER -Moraxella and Related Orga nisms Quality control should be performed on which two organisms to determine the validity of deoxyribonuclease (DNase) media? - ANSWER -M. nonliquefaciens and M. canis True cocci, such as most Neisseria spp. and Moraxella (Branhamella) catarrhalis, can b e differentiated from morphologically similar Moraxella species by: - ANSWER - subjecting the bacterium to noninhibitory concentrations of penicillin. The virulence of this organism(s), which is transmitted via a dog bite, is attributed to: - ANSWER -something unknown. Testing for differentiation of Moraxella lacunata from other Moraxella species can best be performed by: - ANSWER -the ability to liquefy serum. Which of the following tests can be performed to differentiate the two subspecies of Neisseria —elongata and glycolytica? - ANSWER -Catalase Testing for differentiation of Moraxella nonliquefaciens and M. osloensis can best be performed by: - ANSWER -the ability to utilize acetate. Which organism appears clear on MacConkey agar and resembles some colonies of the Enterobacteriaceae family? - ANSWER -M. canis The species of Moraxella that is most commonly associated with human infections, primarily of the respiratory tract, is: - ANSWER -M. catarrhalis. In Gram -stained preparations, Moraxella atlantae will appear as: - ANSWER -either gram -negative coccobacilli or short, broad rods that tend to resist decolorization and may appear gram -
variable. In Gram -stained preparations, Moraxella lacunata will appear as: - ANSWER -coccobacilli or medium -sized rods. Chapter 29 - ANSWER -Eikenella and Similar Organisms Eikenella corrodens can be easily recognized in culture by its: - ANSWER -bleachlike odor. Quality co ntrol performed on indole reagent should be performed on which two organisms? - ANSWER -Eikenella corrodens and Weeksella virosa Of the asaccharolytic, oxidase -positive bacilli that do not grow on MacConkey agar, which one of the following organisms is
Sphingomonas. A yellow -pigmented, gram -negative rod on blood agar that is oxidase -positive, motile by wet mount, and has the ability to oxidize gluc ose, xylose, and sucrose is most likely which of the following? - ANSWER -Sphingomonas Which of the following statements best describes the habitats of Acidovorax, Sphingobacterium, and Sphingomonas? - ANSWER -Habitats are unknown. Although no definitive g uidelines are available for the treatment of Sphingomonas paucimobilis infections, which antibiotic appears to have potential activity against this organism? - ANSWER -Trimethoprim -sulfamethoxazole combination Chapter 28 - ANSWER -Moraxella and Related Orga nisms Quality control should be performed on which two organisms to determine the validity of deoxyribonuclease (DNase) media? - ANSWER -M. nonliquefaciens and M. canis True cocci, such as most Neisseria spp. and Moraxella (Branhamella) catarrhalis, can b e differentiated from morphologically similar Moraxella species by: - ANSWER - subjecting the bacterium to noninhibitory concentrations of penicillin. The virulence of this organism(s), which is transmitted via a dog bite, is attributed to: - ANSWER -something unknown. Testing for differentiation of Moraxella lacunata from other Moraxella species can best be performed by: - ANSWER -the ability to liquefy serum. Which of the following tests can be performed to differentiate the two subspecies of Neisseria —elongata and glycolytica? - ANSWER -Catalase Testing for differentiation of Moraxella nonliquefaciens and M. osloensis can best be performed by: - ANSWER -the ability to utilize acetate. Which organism appears clear on MacConkey agar and resembles some colonies of the Enterobacteriaceae family? - ANSWER -M. canis The species of Moraxella that is most commonly associated with human infections, primarily of the respiratory tract, is: - ANSWER -M. catarrhalis. In Gram -stained preparations, Moraxella atlantae will appear as: - ANSWER -either gram -negative coccobacilli or short, broad rods that tend to resist decolorization and may appear gram -
variable. In Gram -stained preparations, Moraxella lacunata will appear as: - ANSWER -coccobacilli or medium -sized rods. Chapter 29 - ANSWER -Eikenella and Similar Organisms Eikenella corrodens can be easily recognized in culture by its: - ANSWER -bleachlike odor. Quality co ntrol performed on indole reagent should be performed on which two organisms? - ANSWER -Eikenella corrodens and Weeksella virosa Of the asaccharolytic, oxidase -positive bacilli that do not grow on MacConkey agar, which one of the following organisms is
