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Bacteria are gram positive or gram negative. Serratia happens to be a gram negative bacteria. They appear pink on a gram stain. Gram positive bacteria stain to a purple color on a gram stain. We can classify and ID bacteria using their gram stain and shape. Some antibiotics only work on gram negative bacteria and some only work on gram positive bacteria. It helps a doctor know which antibiotic to use.

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15y ago
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5mo ago

Gram-negative on a Serratia marcescens gram stain means that the bacterium has a cell wall that does not retain the crystal violet stain used in the gram staining procedure. This indicates that Serratia marcescens has a thin peptidoglycan cell wall, and the outer membrane contains lipopolysaccharides.

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Q: What does gram negative on a serratia marcescens gram stain mean?
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Related questions

What color and shape is serratia marcescens?

Serratia marcescens is a gram-negative bacterium that typically appears as a pink or red color on agar plates. It is often shaped like small rods or coccobacilli.


The arrangement of serratia marcescens?

Serratia marcescens is a rod-shaped, Gram-negative bacterium that is arranged singly, in pairs, or in short chains. It does not form structures like spores or capsules. Under the microscope, its characteristic pink to reddish color can aid in its identification.


Is serratia marcescens acid-fast?

No, Serratia marcescens is a Gram-negative bacterium and is not acid-fast. Acid-fast staining technique is used to detect organisms like Mycobacterium tuberculosis, which have a waxy lipid layer in their cell wall that resists staining by conventional methods.


Can serratia marcescens produce endospores?

no. in general, only gram-positive bacteria such as Bacillus and Clostridium produce endospores.


What is the gram stain for cholera?

Gram Negative


What is Salmonella shigella yersinia and serratia?

Salmonella, Shigella, Yersinia, and Serratia are all gram-negative facultatively anaerobic rods.


What is the gram stain of enterobacter cloacae?

Enterobacter cloacae is a Gram-negative bacterium. It will stain pink or red in a Gram stain procedure.


What is the Gram stain result of Salmonella?

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Acetobacter is typically Gram-negative.


Is HIV gram stain positive or negative?

The answer to whether HIV gram-stain positive or negative is that HIV gram-stain is negative. They retain the light red or pink color after the stain.


What is Serratia?

Serratia is a genus of Gram-negative bacteria commonly found in soil, water, and animals. Some species of Serratia can cause infections in humans, particularly in healthcare settings. These bacteria are often resistant to multiple antibiotics.


What color is Gram- stain?

Gram- negative bacteria turns red to pink after the gram stain is performed.