Day old turkey poults (the F generation) were imported from the USA into the UK and in 1968 young turkey poults of one hatch (F1 generation) showed clinical signs and lesions of arizona infection and serotype 7: 1, 7, 8 was isolated from stock of both generations. After the F3 generation, the flock was dispersed to several large breeders but there seems to have been no evidence of arizona infection in the subsequent five generations of progeny.
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