⚠️ Research Use Only. Not validated for clinical diagnostic use.
Time-Kill Curve Calculator
Bactericidal vs bacteriostatic analysis from CFU/time data. Log reduction, time to 99.9% killing.
Time-Kill Analysis
Enter time (hours) and CFU/mL pairs, one per line. Bactericidal = ≥3 log₁₀ reduction.
Results
Initial CFU/mL
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Final CFU/mL
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Log₁₀ Reduction
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Classification
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Time to 99.9%
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Classification Criteria
| Log₁₀ Reduction | Classification |
|---|---|
| ≥ 3 | Bactericidal (kills bacteria) |
| 1 – 3 | Bacteriostatic (inhibits growth) |
| < 1 | No significant effect |
Frequently Asked Questions
What is bactericidal?
Bactericidal = ≥3 log₁₀ reduction in CFU from initial count at 24 hours.
What is bacteriostatic?
Bacteriostatic = 1–3 log₁₀ reduction in CFU (growth inhibited but not killed).
What is time to 99.9% killing?
The time at which CFU drops to 0.1% (1/1000) of the initial count.