Experimental egg-transmission of avian reovirus [Chickens, virus diseases]

Two experiments with an avian reovirus (FDO isolant), serologically identical to the Fahey-Crawley and WVU 2937 isolants, provided conclusive proof that egg-transmission can occur. In the first experiment, 4-day-old chicken embryos were inoculated into the yolk sac with serial dilutions of virus and...

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Bibliographic Details
Published in:Avian diseases 1975, Vol.19 (1), p.104-111
Main Authors: Menendez, N. A., Calnek, B. W., Cowen, B. S.
Format: Article
Language:English
Subjects:
Administration, Intranasal
Animals
Arthritis
Arthritis - transmission
Arthritis - veterinary
Cells, Cultured
Chick Embryo - microbiology
Chickens
Chicks
Cloaca - microbiology
Disease transmission
Eggs
Embryos
Esophagus
Female
Incubation
Infections
Kidney
Neutralization Tests
Poultry Diseases - immunology
Poultry Diseases - microbiology
Poultry Diseases - transmission
Precipitin Tests
Reoviridae
Reoviridae - growth & development
Reoviridae - immunology
Reoviridae - isolation & purification
Reoviridae Infections - microbiology
Reoviridae Infections - transmission
Reoviridae Infections - veterinary
Trachea
Viruses
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Summary:Two experiments with an avian reovirus (FDO isolant), serologically identical to the Fahey-Crawley and WVU 2937 isolants, provided conclusive proof that egg-transmission can occur. In the first experiment, 4-day-old chicken embryos were inoculated into the yolk sac with serial dilutions of virus and subsequently hatched. High virus doses killed all embryos, whereas low doses (14 or less plaque-forming units) allowed some embryos to hatch normally although infected. In the second experiment, virus was administered by the nasal, esophageal, and tracheal routes to twenty 15-month-old breeders. Eggs from -6 to 21 days and 58 to 64 days postinoculation were incubated. Three newly hatched chicks from eggs laid on successive days (17, 18, and 19 days postinoculation) and one infertile egg (61 days postinoculation) were found infected. Active infection, as judged by virus isolations from cloacal swabs, was over by the 17th day postinoculation.
ISSN:0005-2086
1938-4351
DOI:10.2307/1588960