TABLE 5.

Intestinal lesion scores of birds immunized with three injections intramuscularly and then infected with a severe challenge with C. perfringens

ProteinNo. of chickensNo. of chickens with the following lesion scores:Mean no. of chickens
01+2+3+4+5+
Vehicle-only controls220556422.68
Alpha toxoid/toxina, b1910810000.53
HPa208642001.0
GPD184461111.64
tPFORa199262001.05
GPD + HP195571101.36
  • a Immunized groups that have significantly fewer chickens with lesions than the unimmunized vehicle-only control group (Fisher's exact test, P ≤ 0.05).

  • b The birds in this group received alpha-toxoid in the first two injections and alpha-toxin in the third.