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  • Title: Pathology of an outbreak of highly pathogenic avian influenza A(H5N1) virus of clade 2.3.2.1a in turkeys in Bangladesh.
    Author: Mumu TT, Nooruzzaman M, Hasnat A, Parvin R, Chowdhury EH, Bari ASM, Islam MR.
    Journal: J Vet Diagn Invest; 2021 Jan; 33(1):124-128. PubMed ID: 33054595.
    Abstract:
    A mixed-aged flock of 130 turkeys in Bangladesh reported the sudden death of 1 bird in September 2017. Highly pathogenic avian influenza A(H5N1) virus was detected in 3 turkeys, and phylogenetic analysis placed the viruses in the reassortant clade 2.3.2.1a. The birds had clinical signs of depression, diarrhea, weakness, closed eyes, and finally death. The mortality rate of the flock was 13% over the 6 d prior to the flock being euthanized. At autopsy, we observed congestion in lungs and brain, hemorrhages in the trachea, pancreas, breast muscle, coronary fat, intestine, bursa of Fabricius, and kidneys. Histopathology revealed hemorrhagic pneumonia, hemorrhages in the liver and kidneys, and hemorrhages and necrosis in the spleen and pancreas. Significant changes in the brain included gliosis, focal encephalomalacia and encephalitis, and neuronophagia.
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