Lawsonia intracellularis cultivation, anti-lawsonia intracellularis vaccines and diagnostic agents

Cultivating Lawsonia intracellularis (LI) bacteria comprises: (a) incubating the bacteria at an oxygen concn. of 18% and (b) maintaining the bacteria in suspension, to cultivate the bacteria. Also claimed are: (1) a method for cultivating LI bacteria comprising: (a') inoculating culture cells w...

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Hauptverfasser: KNITTEL JEFFREY P, ROOF MICHAEL B
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Sprache:eng ; hun
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creator KNITTEL JEFFREY P
ROOF MICHAEL B
description Cultivating Lawsonia intracellularis (LI) bacteria comprises: (a) incubating the bacteria at an oxygen concn. of 18% and (b) maintaining the bacteria in suspension, to cultivate the bacteria. Also claimed are: (1) a method for cultivating LI bacteria comprising: (a') inoculating culture cells with an inoculum comprising LI bacteria so as to infect the cells with the bacteria and (b') incubating the infected cells at a temp. of 36 -38 [deg]C in an oxygen concn. of 0-8% while agitating the infected cells so as to cultivate the LI while maintaining the infected cells in suspension; (2) a method for producing an attenuated LI strain comprising: (i) obtaining culture cells infected with LI bacteria, (ii) incubating the infected cells at an oxygen concn. of 0-18%, (iii) agitating the infected cells so as to cultivate the bacteria while maintaining the infected cells in suspension, (iv) passaging at least a portion of the cultivated bacteria and (v) selecting for an attenuated strain to provide an attenuated LI bacteria; (3) a vaccine for inducing an immune response to LI bacteria in an animal comprising an attenuated strain of LI in a carrier, where the attenuated strain is in amt. effective to produce an immune response.
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subjects BEER
BIOCHEMISTRY
CHEMISTRY
COMPOSITIONS OR TEST PAPERS THEREFOR
COMPOSITIONS THEREOF
CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL ORENZYMOLOGICAL PROCESSES
CULTURE MEDIA
ENZYMOLOGY
HUMAN NECESSITIES
HYGIENE
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEICACIDS OR MICROORGANISMS
MEDICAL OR VETERINARY SCIENCE
METALLURGY
MICROBIOLOGY
MICROORGANISMS OR ENZYMES
MUTATION OR GENETIC ENGINEERING
ORGANIC CHEMISTRY
PEPTIDES
PHYSICS
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
PROCESSES OF PREPARING SUCH COMPOSITIONS
PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS
SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS
SPIRITS
TESTING
VINEGAR
WINE
title Lawsonia intracellularis cultivation, anti-lawsonia intracellularis vaccines and diagnostic agents
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