Exam 14: Bacillus and Similar Organisms

Induction of sporulation by Bacillus species can be accomplished with _____ agar.

The microbiologist identified an organism that produces large γ-hemolytic colonies on blood agar and appears as a gram-variable rod on Gram staining.In order to further identify the organism,the microbiologist should:

Suspect spore-forming,gram-positive Bacillus species that is γ-hemolytic,nonmotile,and penicillin-susceptible and that produces a wide zone of lecithinase on egg yolk agar can be identified as:

Which of the following is described as a spore-forming,gram-positive Bacillus that is β-hemolytic,motile,Voges-Proskauer (VP)-positive,and citrate-positive and causes two types of food poisoning as a result of toxin release?

Enzyme-linked immunosorbent assays (ELISAs)are available that can serologically identify which Bacillus species?

A patient diagnosed with B.anthracis is allergic to penicillin.Which antibiotic can be given that will be therapeutically effective?

Which of the following types of anthrax occurs after ingesting the spores and affects the abdominal or oropharyngeal area? (Patients usually die from toxemia and overwhelming sepsis. )

Media that can be used for isolating Bacillus anthracis include:

Induction of capsule formation by B.anthracis can be accomplished with _____ agar.

A gram-positive Bacillus,which is β-hemolytic on 5% sheep blood agar,produces a wide zone of lecithinase on egg yolk agar,is nonmotile,and was isolated from the stool of a patient with abdominal pain and watery diarrhea.Because of the patient's existing immunocompromised state,the physician administered penicillin as the antibiotic therapy.The patient's condition did not improve after 7 days of treatment.Which one of the following statements explains the reason for the antibiotic failure?

A U.S.Food and Drug Administration (FDA)-cleared immunochromatographic test produces a red line on the cassette and can presumptively identify which gram-positive Bacillus that is g-hemolytic and morphologically has a "Medusa head" appearance when grown on 5% sheep blood agar?