Neonatal avian pneumovirus infection in commercial turkeys

Avian Diseases
H J ShinD A Halvorson

Abstract

Eleven market turkey flocks developed a respiratory disease characterized by coughing, swollen sinuses and nasal discharge. These symptoms first appeared between 3 and 16 days of age. Avian pneumovirus (APV) RNA was detected by reverse transcriptase (RT)-polymerase chain reaction (PCR) in six of six flocks tested. APV was detected by immunohistochemistry in turbinates of three of three affected flocks tested. Virus isolation attempts were negative. Ten of 11 flocks became seropositive on the APV enzyme-linked immunosorbent assay. Five weeks prior to hatch of these affected market turkeys, several breeder flocks in one geographic area had developed clinical signs and experienced decline in egg production typical of APV infection. In two breeder flocks, acute and convalescent sera indicated APV infection during the period of declining egg production. Attempts to detect APV RNA by RT-PCR from choanal cleft swabs of newly hatched poults were successful. Attempts to isolate the virus from these PCR-positive samples were negative.

References

Apr 9, 1988·The Veterinary Record·R E GoughR D Hancock
Mar 24, 2000·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·S M GoyalV Kapur
Jul 25, 2000·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·S ChiangV Kapur
Aug 19, 2000·Archives of Virology·H J ShinK V Nagaraja
Mar 13, 2001·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·F E JirjisD P Shaw

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Citations

Jan 13, 2006·Avian Diseases·Binu T VelayudhanKakambi V Nagaraja
Jan 19, 2007·Vaccine·Binu T VelayudhanKakambi V Nagaraja

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Methods Mentioned

BETA
enzyme-linked immunosorbent assay
ELISA
PCR

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