Manejo Epidemiologia De Un Brote De La Enfermedad De Glässer Y Su Control Posinfeccion En La Estación Agraria San Pablo.

Abstract

An outbreak of Glässer's disease (caused by Glaesserella parasuis) was reported, and the epidemiological management of this outbreak is described. It occurred at the San Pablo Agricultural Station in a complete production system with animals of the PIC 337 genetic line. The objective was to identify the possible causes involved in the outbreak and to analyze the measures implemented for its management, control, and diagnosis through the collection and systematization of clinical data, health records, necropsy, and histopathology. The outbreak coincided with a modification of the vaccination protocol for Mycoplasma hyorhi and porcine circovirus type 2, for which only one application was given instead of the usual two. This led to a gap in immune development and left the animals vulnerable to Glaesserella parasuis. Clinical signs included fever, hyporexia, anorexia, lameness, and prostration. The necropsy revealed fibrinous polyserositis, arthritis, splenomegaly, and alterations in other organs consistent with the disease. Treatment with antibiotics and NSAIDs, restoration of the sanitary protocol, proper management of biosecurity processes, and administration of the Glaesserella parasuis vaccine allowed for the stabilization of the herd's microenvironment and a reduction in morbidity. The study of serotypes and the protocols for their containment were vital for achieving effective herd immunity. Throughout the practice, other triggers of the epidemiological outbreak were identified, including prolonged exposure to harmful gases (quaternary ammonium compounds and other chemicals) due to failures in the cleaning protocol and a lack of staff training, as well as alterations to the sanitary plan regarding the implementation of new vaccines. The above led to the identification of sanitation and vaccination problems as the causes of the Glässer's disease outbreak.