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A PRIMARY STUDY ON THE VIRULENCE OF THREE ISOLATES OF GOOSE PARAMYXOVIRUS

Hua Liu

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Abstract

The virulence of 3 goose paramyxovirus isolates (HG 97 C 5, YG 97 F 11 and YG 98 2 C 4) was determined using traditional virulence tests for Newcastle disease virus. Their mean death time (MDT) of chicken embryos were 56.7, 52.0 and 53.2, intracerebral pathogenicity index (ICPI) in day old chicks were 1.64, 1.69 and 1.70, and intravenous pathogenicity index (IVPI) in 6 week old chickens were 2.62, 2.60 and 2.60, respectively. Similar tests were also performed on goose embryos and geese for the three isolates with MDT of 68.8, 67.4 and 70.2, ICPI of 1.52, 1.64 and 1.66, and IVPI of 1 26, 1.65 and 1.68, respectively. These results indicated that the three isolates were highly pathogenic for both chickens and geese.

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What this paper is about

The virulence of 3 goose paramyxovirus isolates (HG 97 C 5, YG 97 F 11 and YG 98 2 C 4) was determined using traditional virulence tests for Newcastle disease virus. Their mean death time (MDT) of chicken embryos were 56.7, 52.0 and 53.2, intracerebral pathogenicity index (ICPI) in day old chicks were 1.64, 1.69 and 1.70, and intravenous pathogenicity index (IVPI) in 6 week old chickens were 2.62, 2.60 and 2.60, respectively. Similar tests were also performed on goose embryos and geese for the three isolates with MDT of 68.8, 67.4 and 70.2, ICPI of 1.52, 1.64 and 1.66, and IVPI of 1 26, 1.65 and 1.68, respectively. These results indicated that the three isolates were highly pathogenic for both chickens and geese.

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Available abstract

The virulence of 3 goose paramyxovirus isolates (HG 97 C 5, YG 97 F 11 and YG 98 2 C 4) was determined using traditional virulence tests for Newcastle disease virus. Their mean death time (MDT) of chicken embryos were 56.7, 52.0 and 53.2, intracerebral pathogenicity index (ICPI) in day old chicks were 1.64, 1.69 and 1.70, and intravenous pathogenicity index (IVPI) in 6 week old chickens were 2.62, 2.60 and 2.60, respectively. Similar tests were also performed on goose embryos and geese for the three isolates with MDT of 68.8, 67.4 and 70.2, ICPI of 1.52, 1.64 and 1.66, and IVPI of 1 26, 1.65 and 1.68, respectively. These results indicated that the three isolates were highly pathogenic for both chickens and geese.

Key concepts: Goose, Newcastle disease, Virulence, Pathogenicity, Biology, Virology, Virus, Highly pathogenic

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