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| Author(s): |
Vivian Lindmayer Ferreira
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Medicina Veterinária e Zootecnia (FMVZ/SBD) |
| Defense date: | 2012-08-06 |
| Examining board members: |
Tânia de Freitas Raso;
José Antonio Jerez;
Adriana Marques Joppert da Silva
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| Advisor: | Tânia de Freitas Raso |
| Abstract | |
Columbiformes may play an important role in the epidemiology of pathogens with zoonotic potential or economic impact in the poultry industry. Among these pathogens there are Mycoplasma spp., Salmonella spp., Avian Paramyxovirus type 1 (APMV-1), included in the National Poultry Health Program (PNSA) and Chlamydophila psittaci, etiologic agent of an important zoonosis associated with wild birds. Thus, the aim of this study was to investigate, seasonally, the occurrence of the pathogens listed above in feral pigeons (Columba livia) in two warehouses in São Paulo State. During one year, 10 birds were captured monthly in each locality and cloacal swabs and blood samples were collected from each pigeon. The rapid seroagglutination test was performed for the detection of antibodies against M. synoviae, M. gallisepticum and Salmonella Pullorum/Gallinarum. Positive results were submitted to the hemagglutination inhibition and slow seroagglutination test, respectively. For the C. psittacis DNA and APMV-1s RNA diagnosis, molecular techniques PCR and RT-PCR were performed. Hemagglutination inhibition test was also performed in order to detect antibodies against APMV-1. From the serum samples analyzed by rapid seroagglutination test, 3.3% were positive for M. synoviae, 2.5% for M. gallisepticum and 0.4% for S. Pullorum/Gallinarum. However, none of these samples was positive on the confirmatory tests. APMV-1 was not detected in any of the laboratory tests used. C. psittacis DNA was detected in 13.3% of the samples being, 10.8% from pigeons captured during the dry season and 15.8% in the rainy season. These results are relevant since they indicate that C. psittaci occurs in birds living in public areas frequented by a large number of people. The occurrence of the other pathogens was not detected. Nevertheless, due to lack of information about the pigeons sanitary status in the country, additional researches are necessary to determine the risk that feral pigeons can pose in the transmission of pathogens for poultry and the influence of each season in the spread of these microorganisms. (AU) | |
| FAPESP's process: | 10/01288-0 - Evaluation of health status of domestic pigeon (Columba livia) living in areas of storage of grain and seeds in the State of Sao Paulo |
| Grantee: | Vivian Lindmayer Ferreira |
| Support Opportunities: | Scholarships in Brazil - Master |