نتایج جستجو برای: avirulent pathogens

تعداد نتایج: 71282  

2010
M. F. RAHMAN M. A AKANDA M. Z. A. SARKAR

Studies were conducted to develop mild/avirulent strain of PRSV-W using nitrous acid, sodium azide and UV-radiation for the mutagenic treatments. Among the three mutagens’ sodium azide at 3%, 4%, and 5%, and nitrous acid at 0.1M and 0.125M were proved to be effective in producing mild/avirulent strains of PRSV-W, while UV-radiation was proved to be ineffective. Evaluation on the effectivity of ...

Journal: :Proceedings. Biological sciences 2004
Jacobus C de Roode Richard Culleton Sandra J Cheesman Richard Carter Andrew F Read

During an infection, malaria parasites compete for limited amounts of food and enemy-free space. Competition affects parasite growth rate, transmission and virulence, and is thus important for parasite evolution. Much evolutionary theory assumes that virulent clones outgrow avirulent ones, favouring the evolution of higher virulence. We infected laboratory mice with a mixture of two Plasmodium ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1987
K L Deshpande V A Fried M Ando R G Webster

Based on nucleotide sequence analysis of the hemagglutinin (HA) gene from the virulent and avirulent A/chicken/Pennsylvania/83 influenza viruses, it was previously postulated that acquisition of virulence was associated with a point mutation that resulted in loss of a glycosylation site. Since there are two potential glycosylation sites in this region of the HA molecule and since all Asn-Xaa-Th...

Journal: :Current Biology 2000
Eri M Govrin Alex Levine

BACKGROUND Plants have evolved efficient mechanisms to combat pathogen attack. One of the earliest responses to attempted pathogen attack is the generation of oxidative burst that can trigger hypersensitive cell death. This is called the hypersensitive response (HR) and is considered to be a major element of plant disease resistance. The HR is thought to deprive the pathogens of a supply of foo...

Journal: :The Journal of Experimental Medicine 1964
Robert M. Fauve Cynthia H. Pierce-Chase Rene Dubos

Latent corynebactenai infection occurs naturally in many strains of mice. It can be evoked into the active disease, pseudotuberculosis, by a single injection of 10 mg of cortisone. The cortisone effect was tested in 21 colonies, representing 11 genetically different strains of mice. Animals of the C57B1/6, DBA/2, and RIII strains were shown to be latently infected with Corynebacterium kutscheri...

Journal: :Plant physiology 2002
Jianping Cui Georg Jander Lisa R Racki Paul D Kim Naomi E Pierce Frederick M Ausubel

Plants have evolved different but interconnected strategies to defend themselves against herbivorous insects and microbial pathogens. We used an Arabidopsis/Pseudomonas syringae pathosystem to investigate the impact of pathogen-induced defense responses on cabbage looper (Trichoplusia ni) larval feeding. Arabidopsis mutants [npr1, pad4, eds5, and sid2(eds16)] or transgenic plants (nahG) that ar...

2015
Kazuhito Satou Makiko Shimoji Hinako Tamotsu Ayaka Juan Noriko Ashimine Misuzu Shinzato Claudia Toma Toshitsugu Nohara Akino Shiroma Kazuma Nakano Kuniko Teruya Yasunobu Terabayashi Shun Ohki Nobuo Koizumi Shou Okano Toshihiko Suzuki Takashi Hirano

Here, we report the complete genome sequences of low-passage virulent and high-passage avirulent variants of pathogenic Leptospira interrogans serovar Manilae strain UP-MMC-NIID, a major causative agent of leptospirosis. While there were no major differences between the genome sequences, the levels of base modifications were higher in the avirulent variant.

Journal: :Sexually Transmitted Infections 1972

Journal: :Journal of nematology 2007
Michael V McKenry Safdar A Anwar

Harmony grape rootstock displays resistance to several Meloidogyne spp. but that resistance is not durable in commercial vineyard settings. A 2-year experiment in a microplot setting revealed host specificities of two virulent populations of Meloidogyne arenaria and an avirulent population of Meloidogyne incognita. In a subsequent split-root experiment, the avirulent nematode population was dem...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید