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Evaluation of the zootechnical parameters of vaccinating against swine enzootic pneumonia under field conditions
Author(s) -
Pallarés F. J.,
Gómez S.,
Muñoz A.
Publication year - 2001
Publication title -
veterinary record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.261
H-Index - 99
eISSN - 2042-7670
pISSN - 0042-4900
DOI - 10.1136/vr.148.4.104
Subject(s) - kilogram , zoology , enzootic , feed conversion ratio , medicine , veterinary medicine , body weight , biology , virology , virus
A field test was carried out in different production systems to evaluate the effect of vaccination against swine enzootic pneumonia with an inactivated vaccine. A total of 13,691 pigs of four different genetic origins were used, of which 7351 were vaccinated and 6340 were used as controls. The animals were housed in 16 fattening units, in which the ‘one.site’, ‘two‐site’ and ‘three‐site’ production systems were represented. There were the following statistically significant differences in favour of the vaccinated animals: a 1.89 per cent lower mortality (P<0.001), a 0.09 lower feed conversion ratio (P<0.030), a 3.12 per cent lower cost per kilogram gained in fattening (P<0.031), a 4.02 per cent lower cost per kilogram of carcase (P<0.01 8), a 3.77 per cent lower cost of feed per kilogram gained in fattening (P<0.012) and a 56.75 per cent lower potential loss of profit per kilogram gained in fattening due to mortality (P<0.001). An analysis of variance of the effects of genetic origin, treatment and production system on the different parameters showed that only the treatment had any statistically significant effect on the percentage mortality (P<0.002), feed conversion ratio (P<0.030), cost per kilogram gained in fattening (P<0.019), cost per kilogram of carcase (P<0.020), cost of feed per kilogram gained in fattening (P<0.01 5) and potential loss of profit per kilogram gained in fattening due to mortality (P<0.002).