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| Miguel,Tatiana de Á.; Bordini,Jaqueline G.; Saito,Gervásio H.; Andrade,Célia G.T. de J.; Ono,Mario A.; Hirooka,Elisa Y.; Vizoni,Édio; Ono,Elisabete Y.S.. |
| The effect of fludioxonil + metalaxyl-M on the mycelial morphology, sporulation and fumonisin B1 production by Fusarium verticillioides 103 F was evaluated. Scanning electron microscopy analysis showed that the fungicide caused inhibition of hyphal growth and defects on hyphae morphology such as cell wall disruption, withered hyphae, and excessive septation. In addition, extracellular material around the hyphae was rarely observed in the presence of fludioxonil + metalaxyl-M. While promoting the reduction of mycelial growth, the fungicide increased sporulation of F. verticillioides compared to the control, and the highest production occurred on the 14th day in the treatments and on the 10th day in the control cultures. Fumonisin B1production in the culture... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Toxigenic fungi; Mycotoxin; Scanning electron microscopy; Electron micrographs; Extracellular material. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100293 |
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| Vidotto,Marilda C.; Lima,Natália C.S. de; Fritzen,Juliana T.T.; Freitas,Júlio C. de; Venâncio,Emerson J.; Ono,Mario A.. |
| Identification of Escherichia coli causing porcine postweaning diarrhea requires knowledge regarding the prevalent pathotypes within a given region. A total of 100Escherichia coli isolates from piglets with diarrhea in Londrina city, Parana State, South Brazil, were screened for the presence of genes for F4, F5, F6, F18, F41 fimbrial antigens by specific probes and for enterotoxins (STa, STb, LT and STx2e) by polymerase chain reaction (PCR). The results showed that 60% of the isolates were positive for one or more of the fimbrial antigens and 92% were positive at least for one of the virulence factors examined. Virulence factor genes detected were F4 (44%), F18 (38%), F5 (30%), F41 (32%), F6 (25%), LTp-I (71%), STa (40%), STb (47%) and STx2e (3%). Twenty... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Porcine Escherichia coli; Virulence genes; Postweaning diarrhea; Toxins. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000100035 |
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