Question:
Bacterial species which produces red rots in eggs are:
Bacterial species which produces red rots in eggs are:
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To remember: Serratia causes Scarlet (Red) rot, while Pseudomonas fluorescens causes fluorescent green rot.
Updated On: Jul 4, 2026
- Pseudomonas fluorescence
- Serratia
- Aeromonas
- Acinetobacter and Alcaligenes
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The Correct Option is B
Solution and Explanation
Concept:
Egg spoilage (rot) is categorized by the color and odor produced by the invading bacteria.
• Green rot: Caused by Pseudomonas fluorescens.
• Black rot: Caused by Proteus, Pseudomonas, and Aeromonas.
• Red rot: Caused by species that produce red pigments.
Step 1: Identifying the causative agent.
Red rot is primarily caused by Serratia marcescens. This bacterium is well-known for its ability to produce a bright red pigment.
Step 2: Understanding the pigment production.
The red pigment produced by Serratia is called prodigiosin. When these bacteria grow inside the egg, the whites and yolk take on a reddish hue.
Step 3: Determining the final answer.
Comparing the given options, Serratia is the correct choice for red rot. Final Answer: (B)
• Green rot: Caused by Pseudomonas fluorescens.
• Black rot: Caused by Proteus, Pseudomonas, and Aeromonas.
• Red rot: Caused by species that produce red pigments.
Step 1: Identifying the causative agent.
Red rot is primarily caused by Serratia marcescens. This bacterium is well-known for its ability to produce a bright red pigment.
Step 2: Understanding the pigment production.
The red pigment produced by Serratia is called prodigiosin. When these bacteria grow inside the egg, the whites and yolk take on a reddish hue.
Step 3: Determining the final answer.
Comparing the given options, Serratia is the correct choice for red rot. Final Answer: (B)
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