Efficacy of Air Filters in Preventing Transmission of Newcastle Disease

Hopkins, S. R.; Drury, L. N.

doi:10.2307/1588737

Cited by 14 publications

(27 citation statements)

References 6 publications

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“…Filter media of this type were found to be most suitable for preventing transmission of NDV (Hopkins and Drury, 1971) and have been used in a number of applications for poultry isolators (Phillips et al, 1962;Brewer et al, 1969;Drury et al, 1969). Our results also indicate that these filters are highly efficient in preventing transmission of NDV when challenged by aerosol.…”

Section: Microbiological Securitysupporting

confidence: 59%

Application of a flexible‐film isolator for rearing specific pathogen‐free chickens and investigating poultry pathogens

Dennett

Bagust

1979

Avian Pathology

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SUMMARYA commercially-available flexible-film isolator kit was adapted for rearing specific pathogen free poultry and for carrying out experiments with avian pathogens. By increasing the standard air hose diameter from 32 mm to 75 mm and incorporating large metal filter canisters in place of the standard plastic filter sleeves, air flow rates were increased up to 8-fold. These changes allowed a greater number of birds to be maintained for longer periods without the previous problems of condensation of water vapour on the inside surfaces of the isolator. Fibreglass mat filters were shown to be efficient in retaining Newcastle disease virus when challenged by aerosol produced experimentally. Cross-contamination by virus infections between adjacent isolators was prevented for at least 12 weeks. The use of air-tight seals between the isolator canopy and structural components, air-tight feeder and light supports, an automatic watering system and facilities to improve portability are described. The adaptations resulted in an isolator which was efficient to use and maintain.

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Section: Microbiological Securitysupporting

confidence: 59%

Application of a flexible‐film isolator for rearing specific pathogen‐free chickens and investigating poultry pathogens

Dennett

Bagust

1979

Avian Pathology

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“…Whether the use of such fil-ters is practical under commercial conditions depends not only on their ability to remove disease agents but also on the operational cost per unit volume of filtered air which may vary between filters of different types and efficiencies. Only one type of commercial high-efficiency air filter was found to retain Newcastle disease virus (7). This study demonstrates the efficacy of commercial filters of various types in removing infectious MDV particles from the air.…”

mentioning

confidence: 79%

Efficiency of Commercial Air Filters Against Marek's Disease Virus

Burmester

Witter

1972

Applied Microbiology

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“…Experimental inhalation exposure systems are an established tool and the subject of several reviews (Drew and Laskin 1973;MacFarland 1983;Cheng and Moss 1995;Jaeger et al 2006;Wong 2007). Unrelated studies have demonstrated reduced rates of infection by adding filters to livestock housing (Hopkins and Drury 1971;Burmester and Witter 1972;Dee et al 2005Dee et al , 2006a. However, the inhalation studies did not include filters and the animal studies examined only casual transmission between animals and did not expose the animals to a metered challenge of aerosol in a controlled design.…”

Section: Introductionmentioning

confidence: 99%

“…; Wong ). Unrelated studies have demonstrated reduced rates of infection by adding filters to livestock housing (Hopkins and Drury ; Burmester and Witter ; Dee et al . , ,b).…”

Section: Introductionmentioning

confidence: 99%

Design, construction and validation of a nose-only inhalation exposure system to measure infectivity of filtered bioaerosols in mice

Stone

Heimbuch

et al. 2012

J Appl Microbiol

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Aims The aim of this project was to validate a method to deliver a reproducible, selected dose of infective bioaerosol through a respiratory protective technology to an animal that exhibits a proportional clinical response. Methods and Results The Controlled Aerosol Test System (CATS) was designed to generate and condition a viable infective aerosol, pass it through a treatment technology and thence to the breathing zone of a mouse constrained in a Nose‐Only Inhalation Exposure System (NOIES). A scanning mobility particle sizer and impingers at sampling ports were used to show that viability is preserved and particle size distribution (PSD) is acceptably uniform throughout the open CATS, including the 12 ports of the NOIES, and that a particle filter used caused the expected attenuation of particle counts. Conclusions Controlled Aerosol Test System delivers uniformly to mice constrained in the NOIES a selectable dose of viral bioaerosol whose PSD and viable counts remain consistent for an hour. Significance and Impact of the Study This study's characterization of CATS provides a new test system in which a susceptible small‐animal model can be used as the detector in a quantitative method to evaluate the ability of respiratory protective technologies to attenuate the infectivity of an inspired pathogenic aerosol. This provides a major improvement over the use of viable bioaerosol collectors (e.g. impactors and impingers), which provide data that are difficult to relate to the attenuation of pathogenicity.

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Efficacy of Air Filters in Preventing Transmission of Newcastle Disease

Cited by 14 publications

References 6 publications

Application of a flexible‐film isolator for rearing specific pathogen‐free chickens and investigating poultry pathogens

Application of a flexible‐film isolator for rearing specific pathogen‐free chickens and investigating poultry pathogens

Efficiency of Commercial Air Filters Against Marek's Disease Virus

Design, construction and validation of a nose-only inhalation exposure system to measure infectivity of filtered bioaerosols in mice

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