WO1998041243A1 - Procede de reduction par voie thermique d'une contamination par organismes pathogenes d'un milieu de vie pour animaux - Google Patents

Procede de reduction par voie thermique d'une contamination par organismes pathogenes d'un milieu de vie pour animaux Download PDF

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Publication number
WO1998041243A1
WO1998041243A1 PCT/DK1998/000101 DK9800101W WO9841243A1 WO 1998041243 A1 WO1998041243 A1 WO 1998041243A1 DK 9800101 W DK9800101 W DK 9800101W WO 9841243 A1 WO9841243 A1 WO 9841243A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermal energy
water vapour
material surface
organisms
contamination
Prior art date
Application number
PCT/DK1998/000101
Other languages
English (en)
Inventor
Klaus Nielsen
Original Assignee
Micro Clean A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Micro Clean A/S filed Critical Micro Clean A/S
Priority to EP98907908A priority Critical patent/EP0973555A1/fr
Priority to AU66112/98A priority patent/AU6611298A/en
Publication of WO1998041243A1 publication Critical patent/WO1998041243A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/04—Heat
    • A61L2/06—Hot gas
    • A61L2/07—Steam
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M21/00—Apparatus for the destruction of unwanted vegetation, e.g. weeds
    • A01M21/04—Apparatus for destruction by steam, chemicals, burning, or electricity

Definitions

  • the present invention pertains to the reduction or elimi- nation of pathogenic organisms in the environment of animals by thermally inactivating such organisms present in the environment of the animals such as on building material surfaces, including surfaces which are hidden, i.e. not readily visible or accessible, or on any other construction element surface.
  • animal pathogens including bacteria and viruses in the environment of animals represents a source of infectious agents which can cause diseases among the animals present in that environment and/or which may be transmitted from the animals to humans either by direct contact with infected animals or with the animal environment as such or indirectly by contamination of edible products derived from the animals.
  • infectious agents can cause diseases among the animals present in that environment and/or which may be transmitted from the animals to humans either by direct contact with infected animals or with the animal environment as such or indirectly by contamination of edible products derived from the animals.
  • Examples of such food-borne, indirect route transmissions of disease from animals to humans are salmonellosis which can be derived from poultry, pigs and cattle, and infections with Listeria monocytogenes .
  • the currently available methods of reducing the contamination with pathogenic organisms in animal environments include mechanical and/or physical removal of contaminated matter from the animal environment and/or cleaning with water, optionally containing a detergent, which, if desirable, is followed by applying disinfection agents or biocidally active agents such as e.g. hypochlorite . It is also possible to obtain a reduction of the load of pathogens by applying biocidally active hot air or gases, i.e. a fumigation treatment .
  • the climatic conditions including the moisture content in such animal environments or premises are frequently such that good conditions for survival or even growth of pathogens are provided which may result in the build-up of a high contamination level of such pathogens in these premises resulting in a substantial risk that healthy animals or humans become directly or indirectly infected.
  • the present invention provides a method of reducing the contamination with pathogenic organisms in an animal environment, the method comprising at least partially inactivating said organisms associated with a material surface in the environment by applying onto said surface thermal energy initially contained in water vapour at a pressure exceeding 1 bar, in an amount which is sufficient to at least partially inactivate said organisms.
  • the method according to the invention has been developed with the objective of reducing the risk of transmitting animal pathogens associated with animal environments to animals and/or humans.
  • the term "environment” refers to any physical location to which animals may be confined, i.e. the term includes any building where farm animals are kept, such as stables, cowsheds, studs, barns and premises for keeping pigs and poultry.
  • the term also includes the immediate animal environment within such buildings such as pens, pig sitess, kennels, cages including cages for confining zoo animals, and fittings and devices used in the construction of such immediate environments.
  • animal include mammals, birds, fish, reptiles and amphibian animals.
  • the method according to the invention is useful in the environ- merit of farm animals including ruminants such as cattle, sheep and goats, pigs and poultry, but the method is also applicable in environments of fur animals including mink and foxes and environments of pet animals such as dogs and cats.
  • Another serious problem associated with contamination of animal environments is the risk that pathogenic organisms which are also pathogenic for humans are transmitted from the animal environments to humans, which can take place via contamination of edible products derived from the animals or by direct contact with contaminated environments.
  • zoonoses include salmonellosis which is the designation of infections caused by a large number of Salmonella species of the gastroenteritis group including Salmonella typhimurium, Salmonella enteri tides and Salmonella dublin .
  • Salmonella typhimurium Salmonella enteri tides
  • Salmonella dublin Salmonella typhimurium
  • Salmonella enteri tides Salmonella enteri tides
  • Salmonella dublin Salmonella typhimurium
  • Salmonella dublin During recent years, the prevalence of animal farms infected with Salmonel - la species including poultry and pigs has been increasing resulting in an increased frequency of infections in humans.
  • Other examples of such zoonotically transmitted bacterial diseases are infections with enteropathogenic E. coli , liste- riosis caused by Listeria species, tuberculosis, infections OJ C*J NJ t H H
  • the distance between the vapour outlet nozzle element and the contaminated surface to be treated should be relatively short, such as in ⁇ the range of 0-10 cm. In preferred embodiments the distance should be less than 5 cm and in more preferred embodiments the vapour outlet is in contact with the surface.
  • the appropriate period of time where the vapour is applied to the material surface depends on several factors, including the level of microbial contamination, the type of material and the surface structure hereof and the initial temperature of the vapour.
  • a rough surface may require a more prolonged treatment than a smooth surface, which treatment, however, should not be prolonged beyond the point where damages of the material in question occur.
  • the thermal energy is applied to the surface for a period of time which is in the range of 0.01-60 sec/cm 2 including a range of 0.125-10 sec/cm 2 .
  • particularly contaminated or particularly rough surfaces may require a more prolonged treatment, i.e. in excess of 60 sec/cm 2 .
  • the thermal treatment parameters should be selected so as to inactivate or kill essentially all pathogenic organisms. Accordingly, the present method is preferable one which results in killing of at least 50%, preferably at least 75% and in particular at least 90% of one or more pathogenic species initially present on the material surface .
  • An example of a practical means of determining the efficacy of the present thermal treatment is the application of a predetermined amount of suspension of a pathogenic organism such as a Salmonella species or appropriate dilutions hereof onto a given surface e.g. providing areas of the surface being
  • additives which can contribute to the inactivation of fungal materials.
  • Such possible additives include as examples, surface active substances including soap and deter- gents, environmentally acceptable biocidally active compounds, alcohols and salts.
  • the invention is further illustrated by the below non- limiting example .
  • the above surfaces were subjected to a contamination reduction treatment as described above and the surfaces were then examined for presence of surviving Salmonella organisms.
  • the present method is capable of reducing the level of contamination with pathogenic species of Salmonella on commonly used building materials in animal environments.
  • no surviving Salmonella organisms could be detected.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)

Abstract

Ce procédé de réduction par voie thermique d'une contamination par organismes pathogènes présents sur des surfaces à l'intérieur d'un milieu de vie pour animaux consiste à inactiver, au moins en partie, ces organismes en soumettant ces surfaces aux effets de l'énergie thermique tirée de la vapeur d'eau à une pression supérieure à un bar. Cette énergie thermique, produite par apport de vapeur d'eau sous pression sur lesdites surfaces, découle du passage de la phase gazeuse de la vapeur d'eau à la phase liquide à des températures comprises entre 90 et 110C.
PCT/DK1998/000101 1997-03-17 1998-03-17 Procede de reduction par voie thermique d'une contamination par organismes pathogenes d'un milieu de vie pour animaux WO1998041243A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP98907908A EP0973555A1 (fr) 1997-03-17 1998-03-17 Procede de reduction par voie thermique d'une contamination par organismes pathogenes d'un milieu de vie pour animaux
AU66112/98A AU6611298A (en) 1997-03-17 1998-03-17 Method of thermally reducing the contamination with pathogenic organisms in animal environments

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK29597 1997-03-17
DK0295/97 1997-03-17

Publications (1)

Publication Number Publication Date
WO1998041243A1 true WO1998041243A1 (fr) 1998-09-24

Family

ID=8091945

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1998/000101 WO1998041243A1 (fr) 1997-03-17 1998-03-17 Procede de reduction par voie thermique d'une contamination par organismes pathogenes d'un milieu de vie pour animaux

Country Status (3)

Country Link
EP (1) EP0973555A1 (fr)
AU (1) AU6611298A (fr)
WO (1) WO1998041243A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262708A (en) * 1979-09-14 1981-04-21 Reynolds Metals Company Method and apparatus for treating flexible containers
SU1653783A1 (ru) * 1987-12-15 1991-06-07 Ставропольский сельскохозяйственный институт Способ дезинфекции поверхностей

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262708A (en) * 1979-09-14 1981-04-21 Reynolds Metals Company Method and apparatus for treating flexible containers
SU1653783A1 (ru) * 1987-12-15 1991-06-07 Ставропольский сельскохозяйственный институт Способ дезинфекции поверхностей

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 199210, Derwent World Patents Index; Class D22, AN 1992-077913, XP002968798 *

Also Published As

Publication number Publication date
AU6611298A (en) 1998-10-12
EP0973555A1 (fr) 2000-01-26

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