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This medium can be used to prevent swarming of Proteus species.

The image below shows the zone of inhibition for S. aureus around ampicillin.  Is S. aureus susceptible, intermediate or resistant to ampicillin?   Antibiotic Conc. Zone Diameter (mm)     Resistant Intermediate Susceptible Streptomycin (S) 10 ųg 15 Tetracycline (Te) 30 ųg 17 Chloramphenicol (C) 30 ųg 18 Erythromycin (E) 15 ųg 22 Gentamicin (G) 10 ųg 13 Sulfonamides (Sf) 250 ųg 17 Ampicillin (Ap)     (Enterobacteriaceae) 10 ųg 14 Ampicillin (Ap)    (Staphylococcus) 10 ųg 29

Staphylococcus aureus and Serratia marcescens are inoculated on DNAse Agar. What can you tell about Serratia marcescens?

This medium can be used to prevent swarming of Proteus species.

In the nitrate reduction test, which describes the role of Zn dust?

Which tube(s) below are positive for motility, indole production and sulfate reduction? (select one or more than one)

Bacteria that can only ferment lactose will appear ______________________ on EMB agar.

Staphylococcus aureus and Serratia marcescens are inoculated on Mannitol Salt Agar. What can you tell about Serratia marcescens?

This medium can be used to isolate halotolerant organisms.

Use the dichotomous key and the data provided below to identify the organism. The results from testing an unknown organism gave the following results: Gram stain: Pink rods SIM: Black precipitate formed Hydrogen peroxide: Bubbles produced when added to growth Urea Broth: Broth turned bright pink Motility: Cloudiness redness in deep