effects of an arkansas strain of infectious bronchitis vaccine on the head-associated lymphoid tissue (halt).chicks were vaccinated with an arkansas strain of infectious bronchitis virus (ibv) vaccine when they were 1 day (trial 1) or 4 weeks old (trial 2). starting at 4 weeks 3 days of age, chicks in both trials were subjected to an assay that measures the immunofunctional response of the gland of harder (gh), one of the components of the head-associated lymphoid tissue (halt). the assay involved multiple ocular exposures to killed brucella abortus antigen, after which tears were collected and titered ...19911649590
surveys for disease agents in introduced elk in arkansas and kentucky.surveys for disease agents were conducted in introduced free-ranging elk (cervus elaphus nelsoni) in arkansas and kentucky. elk had been captured in colorado and nebraska and released in arkansas during 1981-1985. from 1997 through 2002 elk were captured in arizona, kansas, north dakota, new mexico, oregon, and utah and released in southeastern kentucky. specimens were collected from 170 hunter-killed elk in arkansas during 1998-2006, and 44 elk in kentucky during 2001-2004. significant findings ...201020090032
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