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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Antibodies against Actinobacillus pleuropneumoniae, Mycoplasma hyopneumoniae and influenza virus and their relationships with risk factors, clinical signs and lung lesions in pig farms with one-site production systems in Brazil

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Author(s):
Baraldi, T. G. [1] ; Cruz, N. R. N. [1] ; Pereira, D. A. [1] ; Galdeano, J. V. B. [1] ; Gatto, I. R. H. [1] ; Silva, A. F. D. [2] ; Panzardi, A. [2] ; Linhares, D. C. L. [3] ; Mathias, L. A. [1] ; de Oliveira, L. G. [1]
Total Authors: 10
Affiliation:
[1] Sao Paulo State Univ Unesp, Sch Agr & Vet Sci, Jaboticabal, SP - Brazil
[2] Ourofino Anim Hlth, Cravinhos, SP - Brazil
[3] Iowa State Univ, Coll Vet Med, Vet Diagnost & Prod Anim Med, Ames, IA - USA
Total Affiliations: 3
Document type: Journal article
Source: PREVENTIVE VETERINARY MEDICINE; v. 171, NOV 1 2019.
Web of Science Citations: 0
Abstract

A study was conducted on 21 pig herds using one-site production system in the southeast region of Brazil to assess the relationships among serological results for primary pathogens involved in respiratory diseases (Actinobacillus pleuropneumoniae, App; Mycoplasma hyopneumoniae, Mhyo; and swine influenza virus, SIV), cough index, pneumonia index, pleuritis and herd characteristics. The prevalence of antibodies against Mhyo and SIV increased throughout the raising phases, with the highest prevalence in slaughtered pigs ( > 40%), while pigs in 65% (14/21) of nurseries demonstrated marked seroprevalence of App that decreased until the day of slaughter. Pleuritis and pulmonary consolidations were recorded in 9.0 and 72.4%, respectively, of the 908 evaluated lungs. Histopathological analysis of the lung lesions revealed suppurative bronchopneumonia in almost half of the lungs (48.9%). Regression analyses were conducted to identify risk factors associated with the cough index; pleuritis; pulmonary consolidation; and App, Mhyo and SIV serological results. All-in-all-out management in nursery buildings reduced the seroprevalence of Mhyo in herds. App seroprevalence was associated with pleuritis, and the presence of cough episodes in growing pigs was associated with SIV seropositivity in nursery pigs. (AU)

FAPESP's process: 15/25318-9 - EPIDEMIOLOGICAL SURVEY OF MAIN RESPIRATORY DISEASES IN PIGS OF STATE OF SÃO PAULO
Grantee:Thaís Gasparini Baraldi
Support Opportunities: Scholarships in Brazil - Master