Exam 17: Erysipelothrix Lactobacillus and Similar Organisms

A gram-positive bacillus identified as Lactobacillus is isolated in large quantities from the urine of a 16-year-old female.Based on this information, the patient should receive which antibiotic?

Which organism is nonhemolytic on 5% sheep blood agar but hemolytic on human blood?

The reverse Christie, Atkins, Munch-Petersen (CAMP)test is positive for these curved gram-positive bacilli.Which beta-hemolytic organism is used in conjunction with this organism in the reverse CAMP test?

A 28-year-old woman suspected of having sepsis caused by Gardnerella vaginalis has multiple blood cultures drawn; however, all sets were negative.Which one of the following statements explains this discrepancy?

To test the validity of TSI media, quality control should be performed using which two organisms?

A farmer has a localized, painful skin infection.Cultures are set up, and alpha-hemolytic, catalase-negative, and gram-positive bacilli are isolated.Based on this information, which of the following biochemical results are expected-urease, H₂S production in TSI, and nitrate reduction?

A catalase-negative, non-spore-forming, gram-positive rod that is not acid-fast could possibly belong to which group of bacteria?

A catalase-negative, non-spore-forming, nonbranching, gram-positive rod that produces hydrogen sulfide when inoculated into triple sugar iron (TSI)agar is most likely:

The wet mount and Gram stain of vaginal secretions from a patient who has bacterial vaginosis caused by Gardnerella vaginalis will reveal large:

Clue cells are associated with which gram-positive bacilli?