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Showing posts with the label captive birds

#Infection of #ratites with clade 2.3.4.4b HPAIV #H5N1: Potential implications for zoonotic #risk

By G.M.
  Abstract We detected H5N1 high pathogenicity avian influenza in captive Greater Rhea (Rhea americana). Viral genetic analysis revealed the mammalian associated PB2-E627K mutation , indicating selection of mammalian-relevant mutations in ratites . Pathologic investigation of available tissues demonstrated severe multifocal necrotising inflammation , and a strong vasculotropism. Competing Interest Statement The authors have declared no competing interest. Source: BioRxIV,  https://www.biorxiv.org/content/10.1101/2025.09.08.674895v1 ____
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#Brazil - #Influenza A #H5N1 viruses of high pathogenicity (Inf. with) (non-poultry including wild birds) (2017-) - Immediate notification

By G.M.
 The Official Veterinary Services (OVS) received a notification of acute mortality and neurological signs in swans in a zoo. Laboratory analysis identified H5N1 virus clade 2.3.4.4b. OVS is conducting an epidemiological investigation of the event. Source: WOAH,  https://wahis.woah.org/#/in-review/6485 ____
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Exotic and #Zoological #Birds Resident and Imported into #Nigeria harbour Highly Pathogenic Avian #Influenza Virus: #Threat to #Poultry Production, Food security and Public Health.

By G.M.
Abstract Influenza is a major infectious disease challenge affecting animal and human health globally, and wild birds are historically the primary reservoirs of all the known Influenza A virus subtypes. Here, we detected the Highly Pathogenic Avian Influenza (HPAI) virus in exotic and aquatic birds in three different locations in Nigeria. On the 8th of February 2021, exotic birds: Yellow Golden Pheasant (Chrysolophus pictus), Sultan chicken (Gallus gallus domesticus), Lakenvelder chicken (Gallus gallus domesticus), and Common pheasant (Phasianus calchicus), imported from Libya and transported across the Niger Republic border to Nigeria, were presented to the National Veterinary Research Institute, Vom, for screening. Also, a family in Lagos State bought some exotic aquatic birds from a live bird market in Sokoto State , Nigeria, where sudden death was recorded with the birds showing few clinical signs. Similarly, the sudden death of some aquatic birds was reported in Mandela Parks and ...
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Immunization with a novel #RNA replicon #vaccine confers long-lasting #protection against #H5N1 avian #influenza virus in 24 #bird species

By G.M.
Abstract Highly pathogenic avian influenza viruses (HPAIV) of subtype H5N1 (clade 2.3.4.4b) have spread worldwide and caused the death of hundreds of millions of wild birds and domestic poultry . Moreover, spill over of H5N1 HPAIV from infected birds to more than 50 different mammalian species including humans has been recorded. While, licensed vaccines for protection of avian or mammalian species are not yet available, a few candidate vaccines are being trialled . Here, we report on the experimental vaccination of chickens and captive wild birds using a propagation-defective vesicular stomatitis virus ( VSV ), in which the essential envelope glycoprotein (G) protein gene was replaced by a modified hemagglutinin gene derived from a clade 2.3.4.4b H5N1 isolated in 2022 in the animal park of Bern, Switzerland. VSV∆G(H5mb) was produced on helper cells providing the VSV G protein in trans. Specific pathogen-free (SPF) chickens that were immunized twice via the intramuscular route with adju...
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