General microbiology and sterilisation mnemonic

Stages of the bacterial growth curve

The mnemonic

LLSD

What each word stands for

  • LLag phase: adaptation, no division
  • LLog phase: exponential growth
  • SStationary phase: growth equals death
  • DDecline (death) phase

Why it matters clinically

Antibiotics such as beta-lactams act best on actively dividing bacteria in the log phase.

Where it stops being reliable

Describes a closed culture; infection in the body does not follow a clean curve.

Teaching aid, still awaiting independent review. Confirm facts in a standard source.

More mnemonics

Common questions

What is the General microbiology and sterilisation mnemonic?

LLSD. It helps you recall: Stages of the bacterial growth curve.

What does "L" stand for?

Log phase: exponential growth

What does "S" stand for?

Stationary phase: growth equals death

What does "D" stand for?

Decline (death) phase

What are all the parts of the LLSD mnemonic?

L: Lag phase: adaptation, no division; L: Log phase: exponential growth; S: Stationary phase: growth equals death; D: Decline (death) phase.

Which topic does this mnemonic belong to?

It belongs to General microbiology and sterilisation in Microbiology.

Where does this mnemonic stop being reliable?

Describes a closed culture; infection in the body does not follow a clean curve.

How is this useful clinically?

Antibiotics such as beta-lactams act best on actively dividing bacteria in the log phase.

How do I make this mnemonic stick?

Say it aloud, write it from memory tomorrow, then again in a week. Then test yourself on a Microbiology question about General microbiology and sterilisation.

Is this a standard mnemonic?

It is a teaching aid written or adapted by our team. Some resemble ones students share informally. Check any fact that matters in a standard source.