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1 April 2002 Reduced Efficacy of Hemorrhagic Enteritis Virus Vaccine in Turkeys Exposed to Avian Pneumovirus
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Abstract

Avian pneumovirus (APV) is an immunosuppressive respiratory pathogen of turkeys. We examined the effect of APV infection on the vaccine efficacy of hemorrhagic enteritis virus (HEV) vaccines. APV was inoculated in 2-wk-old turkeys. Two or four days later, an attenuated HEV vaccine (HEVp30) or marble spleen disease virus (MSDV) vaccine were administered. Virulent HEV challenge was given 19 days after HEV vaccination. APV exposure compromised the ability of HEVp30 and MSDV to protect turkeys against virulent HEV. The protective index values were as follows: MSDV (100%) versus APV MSDV (0%) (P < 0.05); HEVp30 (60%) versus APV HEVp30 (30%) (P < 0.05) (Experiment I) and HEVp30 (56%) versus APV HEVp30 (20%) (P < 0.05) (Experiment II). These data indicated that APV reduced the efficacy of HEV vaccines in turkeys.

Parag Chary, Silke Rautenschlein, and Jagdev M. Sharma "Reduced Efficacy of Hemorrhagic Enteritis Virus Vaccine in Turkeys Exposed to Avian Pneumovirus," Avian Diseases 46(2), (1 April 2002). https://doi.org/10.1637/0005-2086(2002)046[0353:REOHEV]2.0.CO;2
Received: 10 August 2001; Published: 1 April 2002
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