Modelling the spatial spread of H7N1 avian influenza virus among poultry farms in Italy
نویسندگان
چکیده
منابع مشابه
A Spatial SIRS Boolean Network Model for the Spread of H5N1 Avian Influenza Virus among Poultry Farms
To predict the spread of Avian Influenza we propose a synchronous Susceptible-Infected-Recovered-Susceptible (SIRS) Boolean network of poultry farms, using probabilistic Boolean rules. Gravity models from transportation theory are used for the probability of infection of a node in one time step, taking into account farm sizes, distances between farms, and mean distance travelled by birds. Basic...
متن کاملPathological changes in turkeys experimentally infected with different doses of A/ostrich/Italy/984/2000 H7N1 avian influenza virus
Following experimental inoculation of 3-week-old turkeys with different titres (106, 104, 103, 102 and 101 egg infectious dose (EID50)) of A/ostrich/Italy/984/2000 H7N1 highly pathogenic avian influenza virus (HPAIV), the selected tissues and organs were examined for pathological changes. Tissue samples from different organs that obtained from dead and sacrificed birds were fixed in 10% neutral...
متن کاملEvaluation of risk factors for the spread of low pathogenicity H7N2 avian influenza virus among commercial poultry farms.
OBJECTIVE To identify risk factors associated with the spread of low pathogenicity H7N2 avian influenza (AI) virus among commercial poultry farms in western Virginia during an outbreak in 2002. DESIGN Case-control study. PROCEDURE Questionnaires were used to collect information about farm characteristics, biosecurity measures, and husbandry practices on 151 infected premises (128 turkey and...
متن کاملModelling the Wind-Borne Spread of Highly Pathogenic Avian Influenza Virus between Farms
A quantitative understanding of the spread of contaminated farm dust between locations is a prerequisite for obtaining much-needed insight into one of the possible mechanisms of disease spread between farms. Here, we develop a model to calculate the quantity of contaminated farm-dust particles deposited at various locations downwind of a source farm and apply the model to assess the possible co...
متن کاملPathological lesions observed in chickens pre-infected with LP H7N1 A/CK/Italy/1279/99 avian influenza and challenged with homologous HP H7N1 A/ostrich/Italy/984/00
Most highly pathogenic avian influenza viruses (AIV) emerge after field passage of non-pathogenic AIVs in birds. The outbreak of low-pathogenic H7N1 avian influenza virus in Italy during 1999-2000 followed by outbreak of highly pathogenic H7N1 avian influenza virus is one example in this regard. This experiment has been designed to investigate the effect of pre-infection of birds with LPAI on s...
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ژورنال
عنوان ژورنال: Epidemics
سال: 2010
ISSN: 1755-4365
DOI: 10.1016/j.epidem.2010.01.002