The effect of dexamethasone on immune pigeons infected with various strains of Trichomonas gallinae

Journal of Protozoology




Forty-five adult feral pigeons harboring natural Trichomonas gallinae infections were divided into three groups and superinfected with the Jones' Barn strain of T. gallinae. Two weeks following superinfection all birds were treated with Enheptin? to eliminate the trichomonads and each group was then reinfected with one of three strains of T. gallinae: (1) nonvirulent; (2) oral canker;, (3) Jones' Barn. Simultaneously with reinfection, the birds were treated three times weekly with 1 ml. (2 mg) Azium? intramuscularly. Within 3 weeks some birds began showing signs of trichomoniasis, and at the end of 6 weeks, 40 percent of the birds in the two groups receiving oral canker and .Jones' Barn strains had succumbed. No disease occurred in those birds reinfected with the nonvirulent strain of T. gallinae. Although corticosteroid treatment is not as effective in avian species as it is in some mammals, this drug was sufficiently active to give support to the hypothesis that antibody is responsible for the immunity which develops in pigeons following infection with T. gallinae. An interesting phenomenon worth noting is that the oral canker strain, which ordinarily restricts itself to producing lesions in the upper digestive tract of nonimmune pigeons, produced visceral lesions in Azium?-treated birds identical to those produced by the Jones? Barn strain of T. gallinae

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Publication type:
Publication Subtype:
Journal Article
The effect of dexamethasone on immune pigeons infected with various strains of Trichomonas gallinae
Series title:
Journal of Protozoology
3 suppl.
Year Published:
Contributing office(s):
Patuxent Wildlife Research Center
30 (abstract no. 103)
Larger Work Type:
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Protozoology
First page:
30 (abstra