Is Pseudomonas aeruginosa indole positive?

Pseudomonas gives negative Voges Proskauer, indole and methyl red tests, but a positive catalase test. While some species show a negative reaction in the oxidase test, most species, including P.

Does Pseudomonas aeruginosa produce indole?

Pyocyanin from P. aeruginosa has antibiotic activity towards competing bacteria including indole‐producing E.

Is P. aeruginosa positive for nitrate reduction?

The denitrification pathway of P. aeruginosa contains a host of enzymes devoted to converting nitrate to nitrous oxide and finally nitrogen.

Is Serratia marcescens indole positive or negative?

Biochemical Test and Identification of Serratia marcescens

Which is the reagent that detects indole production?

Indole production is detected by Kovac’s or Ehrlich’s reagent which contains 4 (p)-dimethylamino benzaldehyde, this reacts with indole to produce a red-colored compound. Indole test is a commonly used biochemical test (e.g. in IMVIC test, SIM test, etc).

What are the steps in the nitrate reduction test?

Peptone 5 g/l, Meat extract 3 g/l, Potassium nitrate 1 g/l. Determination of nitrate reduction to nitrite is a two step process.

How are nitrates reduced in the Enterobacteriaceae?

1 All members of the Enterobacteriaceae family reduce nitrate, but some members further metabolize nitrite to other compounds. 2 The reduction of nitrate may be coupled to anaerobic respiration in some species. 3 It is used in differentiating Mycobacterium 更多结果…

How is nitrate reduction used in anaerobic metabolism?

Anaerobic metabolism requires an electron acceptor other than atmospheric oxygen (O 2). Many gram-negative bacteria use nitrate as the final electron acceptor. Nitrate reduction test is a test that determines the production of an enzyme called nitrate reductase, which results in the reduction of nitrate (NO3).