MICROBIOLOGY QUESTIONS AND ANSWERS RATED A+ 2023|2024 UPDATE

MICROBIOLOGY QUESTIONS AND ANSWERS RATED A+ 2023|2024 UPDATE 1. Which of the following tests can be utilized to differentiate Morganella from Providencia? A. Phenylalanine Deaminase and Lysine Deamination B. Indole test and Vogues-Proskauer C. Citrate and Gas production D. Lactose fermentation and Methyl Red test 2. An oxidase negative coccobacillus isolated from a urine specimen grows well on MacConkey, giving a purplish hue. It is resistant to many antimicrobials. a. Pseudomonas b. Acinetobacter c. E. coli d. Neisseria 3. A gram-negative bacillus has been isolated from feces and the confirmed biochemical reaction fit those of Shigella. The organism does not agglutinate in Shigella antisera. What should be done? a. Test the organism with a new lot antisera b. Test with the Vi antigen c. Repeat the biochemical test d. Boil the organism and retest with the antisera 4. Description of morphology of Actinomyces mycetoma. a. Broad base, branching colored brown b. Broad base, septate, bacillary c. Thin walled, branching colored brown d. Thin walled, septate and bacillary form 5. Description of Zygomycetes a. Septate hyphae b. Septate hyphae c. Aseptate hyphae with sporangiospores d. Aseptate hyphae with basidiospores 6. The reverse CAMP test, lecithinase production, double zone hemolysis, and Gram stain morphology are all useful criteria in the identification of: a. Clostridium perfringens b. Streptococcus agalactiae c. Propionibacterium acnes d. Bacillus anthracis 7. An anaerobic gram-negative coccus is found in a patient’s sample after jaw surgery. What organism would it be? a. Prevotella b. Peptostreptococcus c. Veilonella d. Porphyromonas