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Article published the March 15, 2024
We investigated the kinetics of vaccine (A20 and Serva) and wild-type (Class 9) infectious laryngotracheitis virus (ILTV) strains in dust samples after challenge as part of experiments investigating the level of protection provided by variable initial vaccination coverage against the adverse effects of virulent challenge.Two isolator studies using day-old Cobb broiler chickens were conducted to te ...
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Article published the June 12, 2023
Necrotic enteritis (NE) and coccidiosis are the two major economically important enteric diseases of commercial broiler chickens. Coccidiosis predisposes birds to NE by causing physical damage to the gut epithelium and triggering inflammation and immunosuppression which enhances the growth and proliferation of pathogenic Clostridium perfringens (Park et al., 2008). This study was designed to inves ...
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Article published the June 9, 2023
With the growing popularity of free range production systems, the incidence of helminth infections has increased in commercial poultry farms in Australia. Adequate control can only be maintained by regular application of commercial anthelmintics. Until very recently, levamisole (LEV) and piperazine (PIP) were the only registered chemicals to treat nematode infections in chickens with no published ...
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Article published the October 21, 2022
Excreta egg counting techniques can provide valuable information for assessing flock infection levels, selecting nematode resistant chicken breeds and for determining anthelmintic efficacy. Although the Modified McMaster (MDM) method has been used for a long time, it is generally considered to have low sensitivity and precision (Das et al., 2020). The Mini-FLOTAC (MF) is a more recently developed ...
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Article published the September 21, 2022
Infectious laryngotracheitis (ILT) caused by infectious laryngotracheitis virus (ILTV), is a highly contagious upper respiratory disease of poultry causing great economic losses to the chicken industry. New strains have been reported to emerge due to recombination of vaccine and field strains, some of them replacing less virulent strains because of their high virulence. The present study aimed to ...
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Article published the August 30, 2022
Dust found in poultry housing is a complex substance most likely comprised of a mixture of excreta, feather, feed and bedding material. Exposure to poultry dust can impair the health of both poultry and poultry farmworkers as it serves as a medium for survival and spread of pathogenic microorganisms and inhalation of respirable particles and toxins (Just et al. 2009; Viegas et al. 2013). It has al ...
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Article published the August 23, 2022
Infectious laryngotracheitis (ILT), caused by Gallid herpesvirus type 1, is a highly contagious upper respiratory and conjunctival disease of poultry. The virus (ILTV) is thought to exit the host in respiratory aerosols and enter by inhalation of these. High levels of ILTV DNA have been detected in excreta, dust, blood or plasma and in various organs outside the respiratory tract; raising the poss ...
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Article published the October 21, 2021
Free-range layer pullets are typically reared indoors within Australia, but adult layers go outdoors which might cause poorer adaptation due to the mismatch between rearing and laying environments. Indoor enrichments may optimise physical development of pullets and subsequent welfare as adult free-range hens (Campbell et al., 2019). In the outdoor environment, hens may have greater opportunities f ...
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Article published the October 12, 2021
Method detailsSalmonella spp. cause fowl typhoid and pullorum diseases in poultry and are responsible for nontyphoidal Salmonella infection in humans. Prevention of Salmonella infection in chicken flocks is an important step in reducing salmonellosis outbreaks in humans. Vaccination with live attenuated vaccine of certain strains such as e.g. S. Enteritidis, S. Typhimurium and S. Gallinarum has be ...
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Article published the June 23, 2021
Haemorrhagic enteritis virus (HEV) is an immunosuppressive adenovirus that causes haemorrhagic enteritis in young turkey poults with increased incidence of secondary bacterial infections, such as colibacillosis (Pierson and Fitzgerald, 2013). Worldwide live vaccines propagated in cell culture or turkeys (crude spleen homogenates) are used to prevent the disease. In Australia, there is currently no ...
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Location:Armidale, New South Wales, Australia
Profile: Academic / scientific
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