| Literature DB >> 3400115 |
Abstract
A fully virulent field Anaplasma marginale isolate, passaged to a splenectomised white tailed deer, lost virulence for cattle after 18 months in the non-bovine host. This attenuated A. marginale produced a mild response in four 18-month-old Holstein steers characterised by an average 2.4% parasitaemia, a 13% drop in PCV and a positive serological response. All vaccinated steers were immune to challenge with a fully virulent, heterologous A. marginale when compared with non-vaccinated controls.Entities:
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Year: 1988 PMID: 3400115 DOI: 10.1007/bf02242231
Source DB: PubMed Journal: Trop Anim Health Prod ISSN: 0049-4747 Impact factor: 1.559