Which organism grows in Granada medium and carrot broth?

Which organism grows in Granada medium and carrot broth?

• A. S. aureus
• B. E. coli
• C. S. agalactiae
• D. L. monocytogenes

Answer: (C)

Granada medium and carrot broth are used together as a rapid way to detect certain Gram-positive cocci by exploiting their unique growth characteristics and metabolic byproducts. Streptococcus agalactiae (group B streptococcus) can grow on Granada medium and produce signals that are used as a presumptive identifier, while also showing a distinctive reaction in carrot broth due to its specific metabolic activity. This combination makes it stand out among the listed organisms when testing with these two media. The other organisms either do not produce the same growth signal on Granada medium or do not yield the characteristic color change in carrot broth, so they’re less likely to give a positive result in both media.

Granada medium and carrot broth are used together as a rapid way to detect certain Gram-positive cocci by exploiting their unique growth characteristics and metabolic byproducts. Streptococcus agalactiae (group B streptococcus) can grow on Granada medium and produce signals that are used as a presumptive identifier, while also showing a distinctive reaction in carrot broth due to its specific metabolic activity. This combination makes it stand out among the listed organisms when testing with these two media. The other organisms either do not produce the same growth signal on Granada medium or do not yield the characteristic color change in carrot broth, so they’re less likely to give a positive result in both media.