The virus of infectious bronchitis (IB) multiplies primarily in the respiratory tract; little is known about its presence in other organs. Fabricant and Levine (1) reported the presence of virus in eggs during active infection and for 36 days thereafter. Winterfield and Hitchner (5) isolated IB virus from kidneys. The main purpose of this study was to determine what tissues were invaded by IB virus of low and high embryo-passage levels, to estimate the concentration of virus in the tissues, and to determine whether different serological types of avian bronchitis virus would yield similar results.
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Hofstad et al. (1966) studied this question.
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