Table 1

Different groups and experimental design.

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

+


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.

a Phosphate buffered saline solution was used as placebo for the vaccination

b M. hyopneumoniae culture medium was used as placebo for the challenge infection

c Pigs were intratracheally inoculated with 7 ml of 107 CCU/ml M. hyopneumoniae strain F7.2C. at D56

Villarreal et al. BMC Veterinary Research 2012 8:2   doi:10.1186/1746-6148-8-2

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