Histamine-sensitizing factor of Alcaligenes faecalis

Alcaligenes faecalis produced a histamine-sensitizing factor (HSF) in turkey poults and mice, which was detected in poults by an infraorbital sinus test and passive cutaneous anaphylaxis test and in mice by a rectal-temperature differential test. The A. faecalis HSF appeared to be similar to that produced by the genus Bordetella and may be partly responsible for the clinical signs of alcaligenes rhinotracheitis in young poults.