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Related Concept Videos

Bacterial Toxins01:12

Bacterial Toxins

Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...
Microbial Growth Measurement: Indirect Methods01:27

Microbial Growth Measurement: Indirect Methods

Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...

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Related Experiment Video

Updated: Jun 4, 2026

Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients
06:28

Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients

Published on: June 24, 2019

Measurement of endotoxin.

J Phillips1, P Harrison, G Hale

  • 1Therapeutic Antibody Centre, Oxford, UK.

Methods in Molecular Medicine
|February 22, 2011
PubMed
Summary

Bacterial endotoxin, a common contaminant in antibody preparations, poses lethal risks and confounds experimental results. Preventing endotoxin contamination through careful raw material control and aseptic techniques is crucial for both therapeutic products and research.

Area of Science:

  • Biotechnology
  • Immunology
  • Microbiology

Background:

  • Bacterial endotoxins are common contaminants in antibody preparations.
  • Endotoxins can cause lethal pyrogenic effects in vivo and confound experimental results in vitro and in vivo.
  • Controlling endotoxin levels is vital for therapeutic products and experimental integrity.

Purpose of the Study:

  • To highlight the significance of bacterial endotoxins as contaminants.
  • To emphasize the importance of preventing endotoxin contamination.
  • To provide strategies for avoiding and managing endotoxin contamination in antibody preparations.

Main Methods:

  • Scrupulous control of raw materials to prevent bacterial growth.
  • Implementation of good aseptic techniques throughout processes.

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Air-sampled Filter Analysis for Endotoxins and DNA Content

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Detection of Endotoxin in Nano-formulations Using Limulus Amoebocyte Lysate (LAL) Assays
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Detection of Endotoxin in Nano-formulations Using Limulus Amoebocyte Lysate (LAL) Assays

Published on: January 30, 2019

Related Experiment Videos

Last Updated: Jun 4, 2026

Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients
06:28

Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients

Published on: June 24, 2019

Air-sampled Filter Analysis for Endotoxins and DNA Content
09:16

Air-sampled Filter Analysis for Endotoxins and DNA Content

Published on: March 7, 2016

Detection of Endotoxin in Nano-formulations Using Limulus Amoebocyte Lysate (LAL) Assays
06:15

Detection of Endotoxin in Nano-formulations Using Limulus Amoebocyte Lysate (LAL) Assays

Published on: January 30, 2019

  • Utilizing low-endotoxin water sources or purchasing purified water.
  • Preferential use of sterile disposable plasticware and silicone tubing.
  • Specific cleaning protocols for reusable equipment (0.5 M NaOH soak and high-temperature baking).

    • Main Results:

    • Bacterial endotoxins are ubiquitous and pose significant risks.
    • Aseptic techniques and raw material control are more effective than removal methods.
    • Water and wet process equipment are primary sources of endotoxin.
    • Disposable plastics and appropriate cleaning of reusable materials minimize contamination.

    Conclusions:

    • Preventing endotoxin contamination is paramount.
    • Careful selection of materials and rigorous aseptic techniques are essential.
    • Proactive measures are more effective than reactive endotoxin removal.