Browsing by Author "Freer, Enrique"
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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
Freer, Enrique; Moriyón, Ignacio; Pizarro Cerda, Javier; Weintraub, Andrej; Gorvel, Jean Pierre; Moreno, Edgardo (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. ... -
Extensive blooms due to Cochlodinium polykrikoides: New to Costa Rica
Vargas Montero, Maribelle; Freer, Enrique; Jiménez Montealegre, Ricardo; Chacón Guzmán, Jonathan (Intergovernmental Oceanographic Commision, UNESCO, 2004-10-01)At the beginning of April of 2004 an extensive bloom produced by Cochlodinium polykrikoides was detected, embracing the whole Pacific coast of Costa Rica. The bloom was characterized by a red-oxide colour and was located ... -
Occurrence and predominance of the fish killer Cochlodinium polykrikoides on the Pacific coast of Costa Rica
Vargas Montero, Maribelle; Freer, Enrique; Jiménez, Ricardo; Chacón Guzmán, Jonathan (2006-07-01)Water samples were collected at several points along the Pacific coast of Costa Rica (10°00’N, 84°15’E) fortnightly from January 2003 to June 2004. During this period, dense red-ochre discolourations dominated by Cochlodinium ... -
R-Ras Glucosylation and Transient RhoA Activation Determine the Cytopathic Effect Produced by Toxin B Variants from Toxin A-negative Strains of Clostridium difficile
Chaves-Olarte, Esteban; Freer, Enrique; Parra, Andrea; Guzman-Verri, Caterina; Thelestam, Monica; Moreno, Edgardo (Universidad Nacional, Costa Rica, 2003-03)Clostridium difficile induces antibiotic-associated di-arrhea through the production of toxin A and toxin B;the former toxin has been assumed to be responsible forthe symptoms of the disease. Several toxin ... -
R-Ras Glucosylation and transient RhoA activation determine the cytopathic effect produced by Toxin B variants from Toxin A-negative strains of clostridium difficile
Chaves-Olarte, Esteban; Freer, Enrique; Parra, Andrea; Guzman-Verri, Caterina; Moreno, Edgardo; Thelestam, Mónica (American Society for Biochemistry and Molecular Biology, 2003-03-07)Clostridium difficile induces antibiotic-associated diarrhea through the production of toxin A and toxin B; the former toxin has been assumed to be responsible for the symptoms of the disease. Several toxin A-negative ...