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Table 1 Different groups and experimental design.

From: Effect of challenge of pigs previously immunised with inactivated vaccines containing homologous and heterologous Mycoplasma hyopneumoniae strains

Group

Number of pigs

Strain used in bacterin

Challenge infection at D56

Necropsy at D84

A

14

F7.2C

+

+

B

14

F20.1L

+

+

C

14

B2V1W20 1A-F

+

+

D

14

J strain

+

+

E

14

placeboa

+

+

F

8

placebo a

- b

+

  1. Legend: This table shows efficacy of different M. hyopneumoniae bacterins against challenge infection with a highly virulent M. hyopneumoniae strain. Pigs in each group were injected intramuscularly at D7 and D28 with the respective bacterins or a placebo solution. Euthanasia of all pigs was performed on D84.
  2. a Phosphate buffered saline solution was used as placebo for the vaccination
  3. b M. hyopneumoniae culture medium was used as placebo for the challenge infection
  4. c Pigs were intratracheally inoculated with 7 ml of 107 CCU/ml M. hyopneumoniae strain F7.2C. at D56