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South Korea with diarrhea and characteristics of the virulence genes. Can. J. Vet. Res. 74 , 59–64. Lee J. H. Isolation of Escherichia coli from piglets in South Korea with diarrhea

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Triticale is derived from a cross between wheat and rye and the leaf rust pathogen of wheat, Puccinia triticina (Pt), and that of rye, P. recondita sensu stricto (Pr), can potentially cause disease in this crop. Recent studies showed that wheat rust fungi could adapt to warmer temperatures. In this paper, we report on the comparative virulence of three Pt races and one Pr isolate (all were collected in South Africa) on triticale as well as their in vitro response to temperature. Seedling infection types (SITs) of 169 triticale entries to Pt races 3SA144 (North American code SDDN), 3SA145 (CCPS) and 3SA248 (CFPS) and Pr isolate UVPr2 revealed that 3SA144 is the most virulent with 106 triticale entries found susceptible to this race. The three Pt races were avirulent to the four rye cultivars included as controls. UVPr2 was avirulent on all the triticale entries and 49 entries were considered resistant to the Pt races tested. Freshly harvested urediniospores of the above isolates were tested at constant temperature regimes of 10 °C, 22.5 °C and 35 °C to study germination characteristics. Mean urediniospore germination percentages as determined for 3SA144 (61.3%) and UVPr2 (62.6%) were significantly lower when compared to 3SA145 (83.7%) and 3SA248 (84.9%). Race 3SA144 was most sensitive to the higher temperature regime of 35 °C (5.2% germination). Among the investigated races, 3SA144 showed significantly lower mean germ tube elongation rates at all three incubation temperatures. This is the first report of differences in temperature adaptation between Pt races from SA.

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A szerző áttekinti az antibiotikumok és az antibiotikum-kutatás modern szemléletét, és összefoglalja a különféle – természetes, félszintetikus és szintetikus – antibiotikumoknak a kemoterápiában és más humánterápiás területeken betöltött jelenlegi szerepét. Vázolja az ismert és gyógyászatban alkalmazott antibiotikumok eredetét és más területeken (fiziológiás állapotok, mezőgazdaság) történő alkalmazásukat. Részletesen tárgyalja az elmúlt években felmerült problémákat, így a növekvő (poli)rezisztencia és virulencia témakörét és a nem tudományos, társadalmi, gazdasági, financiális kérdéseket. Röviden bemutatja a magyar antibiotikum-kutatás történetét. Ismerteti a jövőbeni kilátásokat és a természetes eredetű hatóanyagoknak a szintetikus szerekkel szembeni előnyeit. Új megközelítésekre hívja fel a figyelmet: a természet kimeríthetetlen élővilágában az új típusú, eddig nem vizsgált mikroorganizmusok és ezek bioszintetikus képességeinek jobb megismerését, valamint új biotechnológiai és genetikai módszerek (genomika, metagenomika, génbányászat) bevezetését. Orv. Hetil., 2013, 154, 563–573.

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. , Nagai , Y. , Iwama , N. , Asano , K. , Naimi , T. , Kuroda , H. , Cui , L. , Yamamoto , K. , Hiramatsu , K. : Genome and virulence determinants of high virulence community-acquired MRSA. Lancet 359 , 1819 – 1827 ( 2002

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Acta Alimentaria
Authors: R. Kiss, G. Szita, M. Herpay, Gy. Csikó, J. Pászti, T. Mag, P. Kovács, G. Kovács, J. Szita, P. Tóth, I. Szatmári, and S. Bernáth

Aidar-Ugrinovich, L., Blanco, J., Blanco, M., Blanco, J.E., Leomil, L., Dahbi, G., Mora, A., Onuma, D.L., Silveira, W.D. & Pestana De Castro, A.F. (2007): Serotypes, virulence genes, and intimin

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Acta Microbiologica et Immunologica Hungarica
Authors: Serra Örsten, Selay Demirci-Duarte, Tuğçe Ünalan-Altıntop, Aslı Çakar, Banu Sancak, Koray Ergünay, and Cumhur Özkuyumcu

biological behaviour of the hvKp strains is partly mediated by genes on a large virulence plasmid or within chromosomal islands [ 13–17 ], some of these regions including mucoviscosity-associated gene A ( magA ), regulator of mucoid phenotype ( rmp ) A and A2

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Acta Microbiologica et Immunologica Hungarica
Authors: Serra Örsten, Selay Demirci-Duarte, TuĞçe Ünalan-Altıntop, Aslı Çakar, Banu Sancak, Koray ErgÜnay, and Cumhur Özkuyumcu

biological behaviour of the hvKp strains is partly mediated by genes on a large virulence plasmid or within chromosomal islands [ 13–17 ], some of these regions including mucoviscosity-associated gene A ( magA ), regulator of mucoid phenotype ( rmp ) A and A2

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threshold concentration enter the cell, bind to regulatory protein, which then act as a transcription factor for several enzymes and virulence factor secretion genes [ 3, 4 ]. On the other hand, in Gram-positive bacteria, a precursor oligonucleotide molecule

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References Asha , P. , Jyothis , M. & Shini , Z. ( 2013 ): A comparative study of virulence factors in enterococci from clinical and

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33 3 16 Jin, Y., Singh, R.P. 2006. Resistance in US wheat to recent Eastern African isolates of Puccinia graminis f. sp tritici with virulence

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