Detection, quantification and genetic variability of Mycoplasma hyopneumoniae from apparently healthy and pneumonic swine
| Autor: | Jorge Timenetsky, Odaylin Plasencia Márquez, Arianna Duque Ortiz, Yaima Burgher Pulgarón, Lucas Miranda Marques, Joan Peña Rodríguez, Angélica Cristine de Almeida Campos, Evelyn Lobo Rivero |
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| Rok vydání: | 2015 |
| Předmět: |
Healthy
General Veterinary biology Enzootic pneumonia VNTR Copy number analysis Mycoplasma medicine.disease_cause biology.organism_classification Microbiology Real-time polymerase chain reaction Porcine enzootic pneumonia Mycoplasma hyopneumoniae Quantification Multiplex polymerase chain reaction M. hyopneumoniae medicine Mollicutes lcsh:Animal culture Genetic variability lcsh:SF1-1100 |
| Zdroj: | Brazilian Journal of Veterinary Research and Animal Science, Vol 52, Iss 4 (2015) |
| ISSN: | 1678-4456 1413-9596 |
| Popis: | Molecular differences among Mycoplasma hyopneumoniae strains present in pneumonic lungs of swine have been largely studied. However, no comparative studies concerning the strains present in apparently healthy pigs have been carried out. This study aimed to detect, quantify and perform molecular analysis of M. hyopneumoniae strains in pig lungs with and without pneumonic lesions. The detection of M. hyopneumoniae was performed using multiplex PCR (YAMAGUTI, 2008), real-time PCR (STRAIT et al., 2008) and multiple VNTR amplification (VRANCKX et al., 2011). Molecular characterization of the strains was achieved by analysis of the VNTR copy number in P97R1, P146R3, H2R1 and H4. M. hyopneumoniae was detected in samples from healthy and pneumonic pigs and the amount of M. hyopneumoniae positive samples detected varied with the type of assay. The greater number of positive samples was identified by the multiple VNTR amplification combined with capillary electrophoresis. Using real-time PCR, 4.9*104 M. hyopneumoniae genome copies/mL was detected in apparently healthy lungs. A mean quantity of 3.9*106 M. hyopneumoniae genome copies/mL was detected in pneumonic lungs. The analysis of VNTR copy number demonstrated a high genetic variability of the M. hyopneumoniae strains present in apparently healthy and pneumonic lungs. Strains having 3 VNTR copy number in P97R1, were detected only in pneumonic lungs and strains having 40 and 43 VNTR copy number in P146R3 were detected only in apparently healthy lungs. Despite the genetic variability of M. hyopneumoniae, predominant strains in the swine farms could be identified. |
| Databáze: | OpenAIRE |
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