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The Limulus amebocyte lysate (LAL) test is a test used to determine if a bacterial cell produces an endotoxin. ILimulus amebocyte lysate is an aqueous extract of blood cells (amoebocytes) from the horseshoe crab, Limulus polyphemus. LAL reacts with bacterial endotoxin or lipopolysaccharide (LPS), which is a membrane component of Gram negative bacteria.
The gel clot method of the bacterial endotoxin test, or BET, is a 60-minute test. This is wherein sample are tested to determine the endotoxin content.
BET TEST- BACTERIAL ENDOTOXIN TESTIT IS ALSO CALLED LAL TESTLAL- LIMULUS AMOEBOCYTE LYSATEWHY WE PERFORM BET TEST ?BACTERIAL ENDOTOXIN TEST IS PERFORM FOR DETECTION THE ENDOTOXIN IN SAMPLE BECAUSE EACH INTRAVESCULAR/ INTRAMUSCULAR INJECTIONS OR INFUSION HAVE ITS ENDOTOXIN LIMIT.WE PERFORM BET TEST TO CHECK ENDOTOXIN IN SAMPLE WHICH SHOULD BE LESS THAN GIVEN LIMIT.REAGENTS USED:-1. LAL- LIMULUS AMOEBOCYTE LYSATE2. LRW- LAL REAGENT WATER3. CSE- CONTROL STANDARD ENDOTOXINLAL:- IT IS AQUEOUS EXTRACT OF AMOEBOCYTE (WHICH IS BLOOD CELLS OF LIMULUS POLYPHEMUS (HORSESHOE CRAB).LRW:- IT IS HIGHLY PURIFIED WATER USED FOR ANALYSIS OF BACTERIAL ENDOTOXIN TEST. IT HAS A MINIMUM QUANTITY OF ENDOTOXIN.CSE:- IT IS EXTRACT OF LIPID A FROM CELL WALL OF GRAM NEGATIVE BACTERIAL (E. COLI)IT IS USED FOR POSITIVE CONTROL IN THE TEST.REACTION:- LAL REACTS WITH BACTERIAL ENDOTOXIN PRESENT IN THE SAMPLE AND GIVE A RESULT AS GEL CLOTING FOR POSITIVE TEST AND NO GEL FORMATION AS A NEGATIVE RESULT.SAMPLE +LAL REAGENTS ---------------------------------- RESULTS100 microliter + 100 microliter --------------------------- gel cloting / no gel formation+ ve result / - ve resultTHANKS & REGARDSSANDEEP K. TYAGIEXECUTIVEQUALITY CONTROL DEPARTMENTV.H.B. MEDISCIENCES LTD. RUDRAPURINDIAMOB.- 97594300159258188360E.mail:- sandeepmicro@rediffmail.com
The amount of endotoxin in protein, peptide or antibody samples is measured by the Limulus Amebocyte Lysate (LAL) test with an endotoxin kit. The concentration of endotoxin in the test specimens is calculated by the LAL kit by chromogenic signal in the presence of endotoxin. This measurement is performed on a microplagin absorption reader at 405 nm. Protein and antibody samples are measured every 30 minutes. The importance of determining the level of endotoxin in evaluating the effectiveness of endotoxin removal methods as well as preventing endotoxic shocks and animals injected with endotoxin-contaminated proteins is very important.
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Albert Wesley Dade has written: 'Effect of bacterial endotoxin in swine and rabbits' -- subject(s): Endotoxins
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Testing for chlamydia is very specific. A regular bacterial culture or wet smear will not detect chlamydia.
A pyrogen is defined as a fever-producing agent. Pyrogens are substances that cause febrile reactions when sufficient amounts enter the circulatory system. Bacterial endotoxin is the most significant pyrogen because of its potency and ubiquity.
A blood culture