Showing 10 of 10 results for "infectious"

 

  • Vaccination and infectious bronchitis virus (IBV) challenge in mature laying hens

    IMG 6984All pullets currently reared in Australia for egg production are vaccinated with live attenuated strains of infectious bronchitis virus (IBV). However, questions have been raised about possible negative effects of attenuated vaccines in adult layer birds. This study was carried to evaluate the effects of both pathogenic wild/field strains and vaccine strains of IBV on the oviduct and also to assess the protectivity of current vaccine strains.

  • Infectious Bursal Disease Virus

    CSK 3AJAThe project was initiated in response to reports in 1995 that a more severe strain of IBDV was presenting in Victoria and NSW. The study aims to characterise these strains, to compare  local IBDV strains with those of other countries, and to determine whether current vaccines provide protection against the recently identified aggressive strains.

  • Molecular epidemiology and pathogenesis of infectious laryngotracheitis viruses in Australia

    MU 2AAThe purpose of this study was to determine the virulence and spread of the Australian ILTV virus, in order to establish a genetic marker for the disease. This could then be developed as a tool for investigating the epidemiology of the disease.

  • Optimising infectious bronchitis vaccination of laying hens for maximum egg shell quality

    UNE 76AAThis study was designed to evaluate different vaccination protocols for infectious bronchitis virus in laying hens. Age at first vaccination, route of  vaccine administration, regular revaccination during lay, and timing of revaccination in relation to an induced moult was investigated.

  • Development of real-time PCR test to quantify infections bronchitis virus in tissues of chickens

    UNE85This study was conducted to develop and evaluate the use of reverse transcriptase real time polymerase chain reaction (RT-PCR) to detect and quantify the viral copy number of infectious bronchitis virus (IBV) from infected tissues of vaccinated and unvaccinated laying hens. The real-time PCR test designed during this project is highly sensitive and can detect as low as 10 viral copy numbers. Along with virulent ‘T’ and vaccine strains A3 and Vic S, the test will also be able to detect at least seven other Australian IBV strains.

  • Diagnosing Avian Respiratory Diseases

    DAQ 200AARespiratory diseases are a major cause of economic losses to the Australian chicken meat and egg industries. This study reports on the development of a quick new diagnostic process to identify two strains of respiratory disease.

  • Diagnostic tools for differentiation of vvIBDV and characterisation of Australian strains

    CSA 15JAThis study aimed to develop a rapid detection tool for vvIBD strains, and to demonstrate that changes in these strains can be clearly differentiated from overseas strains.

  • Rapid identification and pathotyping of virulent IBDV, NDV and AI isolates

    CSA 24JAThe objectives for this project were the development, evaluation and implementation of molecular diagnostic tests for the rapid identification of infectious bursal disease virus (IBDV), Newcastle disease virus (NDV) and avian influenza virus (AIV).

  • Development of Molecular Tests for Serovar-Specific Identification and Typing of Haemophilus paragallinarum

    12 Flock Health FHHaemophilus paragallinarum is the causative agent of infectious coryza, an upper respiratory tract disease of chickens characterised by relatively mild clinical signs. As there have been few studies on methods to type isolates of H. Paragallinarum, this project set to evaluate two different types of rapid, DNA based typing methods. 

  • Investigating Sanitation of Surface Water for Poultry using Chlorine-IBDV Models

    UM 51ASignificant numbers of commercial poultry production sites in Australia rely on surface waters (dams, creeks and rivers) as their major source of drinking water. Exposure of surface water to wild birds can pose disease risks from serious avian pathogens to commercial flocks meaning risk assessment for biosecurity is crucial. This report reviewed the main methodologies used for water sanitation in Australia and indicated that chlorination is the most appropriate technology for poultry sites, if effective treatment can be assured. 

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