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A two-component regulatory system playing a critical role in plant pathogens and endosymbionts is present in Brucella abortus and controls cell invasion and virulence
(Blackwell Science, 1998-04-08)
Two mutants showing increased sensitivity to polycations and surfactants were obtained by transposon mutagenesis of virulent Brucella abortus 2308 Nal(r). These mutants showed no obvious in vitro growth defects and produced ...
Brucella-Salmonella lipopolysaccharide chimeras are less permeable to hydrophobic probes and more sensitive to cationic peptides and EDTA than are their native Brucella sp. counterparts
(American Society for Microbiology, 1996-08-12)
A rough (R) Brucella abortus 45/20 mutant was more sensitive to the bactericidal activity of polymyxin B and lactoferricin B than was its smooth (S) counterpart but considerably more resistant than Salmonella montevideo. ...
Characterization of Brucella abortus and Brucella melitensis native haptens as outer membrane O-type polysaccharides independent from the smooth lipopolysaccharide
(American Society for Microbiology, 1996)
Brucella native haptens (NHs) extracted with hot water from smooth (S)- type B. abortus and B. melitensis were purified to high levels of serological activity and compared with the polysaccharide obtained by acid hydrolysis ...
Epidemiology of bovine anaplasmosis and babesiosis in Costa Rica
(Elsevier, 1994)
A serum bank created by the National Brucellosis Control Program during 1991 con sisted of approximately 4000 sera collected from farms in each of the seven provinces in
Costa Rica. Sera were used to determine the ...
In search of a bacterial spedes definition
(Universidad de Costa Rica., 1997)
The bacterial species concept was examined within the framework of plant and animal associated a-2 proteobacteria, taking into consideration the phylogenetic, taxonomic and biological approaches as well as the microbiologists' ...
Genome evolution within the alpha Proteobacteria: why do some bacteria not possess plasmids and others exhibit more than one diferent chromosome?
(Elsevier, 1998)
Animal intracellular Proteobacteria of the alpha subclass without plasmids and containing one or more chromosomes are
phylogenetically entwined with opportunistic, plant-associated, chemoautotrophic and photosynthetic ...