Abstract
In previous publications,1 we described a pleomorphic micro-organism with coccus, rod and spirillum-like forms which was isolated from the upper part of the respiratory tract of fowls suffering from spontaneous acute and subacute laryngotracheitis. Cocci, ovoid rod forms and granular rods seen in different mediums, as well as numerous diplococci and spirillum-like forms observed in the inflammatory exudate of the respiratory tract, suggest morphologically that the organism* is of a diphtheroid character. The strains from the acute and those from the subacute disease proved indistinguishable by morphologic and cultural tests, but in the agglutination test none of the strains from the subacute disease or carrier fowls were agglutinated in as high dilutions.2 This irregularity in agglutinability, however, does not suggest a difference in type but a specific identity of the micro-organism in the acute and the subacute disease.
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