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The Highly Pathogenic Avian Influenza A (H7N7) Virus Epidemic in the Netherlands in 2003—Lessons Learned from the First Five Outbreaks
Abstract Clinical signs and gross lesions observed in poultry submitted for postmortem examination (PME) from the first five infected poultry flocks preceding the detection of the primary outbreak of
Extended-spectrum-β-lactamase- and AmpC-β-lactamase-producing Escherichia coli in Dutch broilers and broiler farmers.
A high prevalence of birds carrying ESBL/AmpC-producing E. coli at Dutch broiler farms and a high prevalence in farmers is shown, undesirable due to the risk this poses to human health.
Herd immunity to Newcastle disease virus in poultry by vaccination
Newcastle disease is an economically important disease of poultry for which vaccination is applied as a preventive measure in many countries. Nevertheless, outbreaks have been reported in vaccinated
Induction of cystic oviducts and protection against early challenge with infectious bronchitis virus serotype D388 (genotype QX) by maternally derived antibodies and by early vaccination
The experiments confirmed the field observations that the D388 strain of the QX genotype is a very pathogenic strain that is able to cause cystic oviducts in a high percentage of birds, mortality due to nephritis and respiratory distress with complete tracheal ciliostasis and airsacculitis.
In vitro antibiotic sensitivity of strains of Ornithobacterium rhinotracheale isolated in the Netherlands between 1996 and 1999
All the strains of Omithobacterium rhinotracheale isolated in the Netherlands between 1996 and 1999 were tested in the agar gel diffusion test for their sensitivity to amoxycillin, tetracycline,
Ornithobacterium rhinotracheale, a Primary Pathogen in Broilers
Ornithobacterium rhinotracheale was able to induce lesions after aerosol challenge without a previous priming with virus, and thus it was proven to be a primary pathogen.
Serum amyloid A and transferrin in chicken. A preliminary investigation of using acute-phase variables to assess diseases in chickens.
SAA is an acute-phase protein and a more reliable variable for diagnosing lesions in chickens than transferrin, which indicates that other variables, such as breed or breeding conditions, may influence the transferrin level.
Effects of Temperature, Relative Humidity, Absolute Humidity, and Evaporation Potential on Survival of Airborne Gumboro Vaccine Virus
The findings suggest that long-distance transmission of airborne virus is more likely to occur at 20°C than at 10°C or 30°C and that current Gumboro vaccination by wet aerosolization in poultry industry is not very effective due to the fast initial decay.
Effects of therapeutical and reduced levels of antibiotics on the fraction of antibiotic-resistant strains of Escherichia coli in the chicken gut.
The results suggest that, if chickens must be treated with antibiotics, a short intensive therapy is preferable, as even short-term exposure to carry-over levels of antibiotics can be a risk for public health, as also under those circumstances some selection for resistance takes place.
Viral shedding and emission of airborne infectious bursal disease virus from a broiler room
It is concluded that broilers shed IBDV mainly through their faeces, and the presence of indoor airborne virus is associated with the viral presence in faece, indicating there is a potential risk of virus spreading to the ambient environment via air.