INFLUENCE OF SPRAYING WITH DISINFECTANTS ON SOME CLINICAL INDEXES IN PIG PRODUCTION

Abstract

The use of intensivo pig production systems tends to increase prevalence and severity of respiratory diseases, directly correlated with increased exposure to infectious agents and worsening of environmental conditions. Among suggested control measures, the use of aerosols of disinfectants was shown to be effective. Its use objectives dust precipitation and bacterial flora inactivation. In the present work, 7 experimento were carried out using finishing pigs subjected to spraying with different dilution of a disinfectant (Clorhcxidine), at 24 or 48 hour intervals. To assess the efficiency of the treatments, two clinica) indexes were measured: sneeze and cough counts. Through statistical analysis, the main conclusions drawn from the resulta were: a) regarding cough counts, aspersion at 24 hour intervals resulted in a significant reduction in symptoms in 6 out of 7 groups. In the 48 hour groups, only the concentrated solution was efficient. In this case, excepting one treatment with 1:500 dilution, a decrease in symptoms was only observed at the lowest dilution, 1:250. b) Regarding sneeze counts, the use of the highest dilution (1:1800) didn't work at 24 or 48 hour intervals. Excepting one group (1:250 at 24 hour interval), all dilution in the 2 regimes of use (24 or 48 h) were efficient to reduce symptoms. Based in these data, it is concluded that symptoms of sneeze could be reduced using dilution up to 1:500 every 24 or 48 hours. To cough control, the best resulta could be expected using a 1:500 dilution every 24 hours or 1:250 every 48 hours.