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Comparative Evaluation of Tissue Trophism Characteristics in Turkeys and Mallard Ducks after Intravenous Inoculation of Type A Influenza Viruses

E. Laudert, D. Halvorson, V. Sivanandan and D. Shaw
Avian Diseases
Vol. 37, No. 3 (Jul. - Sep., 1993), pp. 773-780
DOI: 10.2307/1592028
Stable URL: http://www.jstor.org/stable/1592028
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Comparative Evaluation of Tissue Trophism Characteristics in Turkeys and Mallard Ducks after Intravenous Inoculation of Type A Influenza Viruses
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Abstract

Ten avian type A influenza viruses consisting of seven waterfowl-origin, one pheasant-origin, and two turkey-origin viruses were evaluated for their pathogenicity potential after intravenous inoculation into domestic turkeys and mallard ducks (Anas platyrhynchos). The replicative abilities and tissue trophism properties of each virus isolate were examined in both species. The overall virus-isolation rate and histopathological lesion score were greater in the turkeys than in the ducks. The waterfowl-origin viruses caused more tissue damage in turkeys than in ducks but had a narrower tissue distribution range. The pheasant isolate was extremely pathogenic in turkeys but had limited distribution and little effect in ducks. The turkey isolates were more pathogenic in turkeys than in ducks. The pancreas was the most severely affected organ in turkeys, followed by kidney and liver. The spleen and bursa were the most commonly affected organs in ducks. /// Se evaluó el potencial patógeno de 10 cepas de virus de influenza tipo A, mediante la inoculación intravenosa en pavos domésticos y patos Mallard (Anas platyrhinchos). Siete cepas provenían de aves acuáticas, una de faisán y dos de pavos. Se examinó la capacidad de replicación y las propiedades de tropismo celular para cada cepa. El porcentaje de aislamiento de virus y el valor de la lesión histopatológica, fueron mayores en los pavos que en los patos. Los virus provenientes de aves acuáticas causaron más daño en los pavos que en los patos, pero tuvieron un rango de distribución tisular más estrecho. La cepa de faisán fue extrema-damente patógena en pavos pero tuvo una distribución limitada y poco efecto en patos. Las cepas de pavo fueron más patógenas en pavos que en patos. El páncreas fue el órgano más severamente afectado en los pavos, seguido del riñón e hígado. El bazo y la bolsa fueron los órganos más comúnmente afectados en los pavos.

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