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the results of isolation and serological tests for human A2 viruses among swine, cattle, poultry, dogs, cats, and horses before and after an epidemic in Ireland are presented.There was no evidence for the presence of either Shope or A2 virus among swine.The results for cattle were also uniformly negative.Cats, dogs, and poultry show a small number of positives with A2/Asia/57 virus.Reasons are given for regarding the positive results as non-specific.Among horses A/equi/Praha virus, or one closely related to it, may be present, but no epizootic due to it has been described and no strains of it have been isolated.Positive results with A2/Asia/57 and A2/ Eire/8/61 were obtained, but none with A2/Asia/57 (Ashton) or A2/Singapore/W/ 1/57.Technical and epidemiological reasons are given for regarding the positive results as non-specific.It is concluded that there is no reservoir of A2 viruses in animals in Ireland, and that no spread to them occurred during the January, 1961 epidemic.This investigation was supported by
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McDonald et al. (1962) studied this question.
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