Search

Your search keyword '"Kronvall, Goran"' showing total 24 results
Start Over Author "Kronvall, Goran"
24 results on '"Kronvall, Goran"'

1. Multidrug-resistant commensal Escherichia coli in children, Peru and Bolivia

Author

Bartoloni, Alessandro, Pallecchi, Lucia, Benedetti, Marta, Fernandez, Connie, Vallejos, Yolanda, Guzman, Elisa, Villagran, Ana Liz, Mantella, Antonia, Lucchetti, Chiara, Bartalesi, Filippo, Strohmeyer, Marianne, Bechini, Angela, Gamboa, Herlan, Rodriguez, Hugo, Falkenberg, Torkel, Kronvall, Goran, Gotuzzo, Eduardo, Paradisi, Franco, and Rossolini, Gian Maria

Subjects
Communicable diseases -- Research, Drug resistance -- Research, Escherichia coli -- Research, Public health -- Research, Children -- Health aspects, Children -- Research, Bolivia -- Health aspects, Bolivia -- Research, Peru -- Health aspects, Peru -- Research
Abstract

Using a rapid screening method, we investigated the prevalence in fecal carriage of antimicrobial drug-resistant Escherichia coli in 3,174 healthy children from 4 urban settings in Peru and Bolivia. High [...]

Published
2006

2. High diversity of Group A streptococcal emm types among healthy schoolchildren in Ethiopia

Author

Abdissa, Alemseged, Asrat, Daniel, Kronvall, Goran, Shittu, Belay, Achiko, Dilachew, Zeidan, Mohammed, Yamuah, Lawrence K., and Aseffa, Abraham

Subjects
Streptococcus -- Research, Children -- Health aspects, Children -- Research, Ethiopians -- Research, Ethiopians -- Health aspects, Rheumatic fever -- Demographic aspects, Rheumatic fever -- Causes of, Health, Health care industry
Published
2006

3. Molecular cloning and characterization of two Helicobacter pylori genes coding for plasminogen-binding proteins

Author

Jonsson, Klas, Guo, Betty P., Monstein, Hans-Jurg, Mekalanos, John J., and Kronvall, Goran

Subjects
Helicobacter pylori -- Research, Science and technology
Abstract

Helicobacter pylori binds a number of host cell proteins, including the plasma protein plasminogen, which is the proenzyme of the serine protease plasmin. Two H. pylori plasminogen-binding proteins have been described; however, no genes were identified. Here we report the use of a phage display library to clone two genes from the H. pylori CCUG 17874 genome that mediate binding to plasminogen. DNA sequence analysis of one of these genes revealed 96.6% homology with H. pylori 26695 HP0508. A subsequent database search revealed that the amino acid sequence of a lysine-rich C-terminal segment of HP0508 is identical to the C terminus of HP0863. Recombinant proteins expressed from HP0508 and HP0863 bound plasminogen specifically and in a lysine-dependent manner. We designate these genes pgbA and pgbB, respectively. These proteins are expressed by a variety of H. pylori strains, have surface-exposed domains, and do not inhibit plasminogen activation. These results indicate that pgbA and pgbB may allow H. pylori to coat its exterior with plasminogen, which subsequently can be activated to plasmin. The surface acquisition of protease activity may enhance the virulence of H. pylori.

Published
2004

4. Increasing resistance in commensal Escherichia coli, Bolivia and Peru

Author

Bartoloni, Alessandro, Pallecchi, Lucia, Fiorelli, Costanza, Di Maggio, Tiziana, Fernandez, Connie, Villagran, Ana Liz, Mantella, Antonia, Bartalesi, Filippo, Strohmeyer, Marianne, Bechini, Angele, Gamboa, Herlan, Rodriguez, Hugo, Kristiansson, Charlotte, Kronvall, Goran, Gotuzzo, Eduardo, Paradisi, Franco, and Rossolini, Gian Maria

Abstract

To the Editor: The global increase of antimicrobial-drug resistance, including resistance to the new and most potent antimicrobial agents, is a major public health concern. In low-resource countries, where bacterial [...]

Published
2008

6. Increase of beta-Lactam-Resistant Invasive Haemophilus influenzae in Sweden, 1997 to 2010

Author

Resman, Fredrik, Ristovski, Mikael, Forsgren, Arne, Kaijser, Bertil, Kronvall, Goran, Medstrand, Patrik, Melander, Eva, Odenholt, Inga, Riesbeck, Kristian, Resman, Fredrik, Ristovski, Mikael, Forsgren, Arne, Kaijser, Bertil, Kronvall, Goran, Medstrand, Patrik, Melander, Eva, Odenholt, Inga, and Riesbeck, Kristian

Abstract

The proportions of Haemophilus influenzae resistant to ampicillin and other beta-lactam antibiotics have been low in Sweden compared to other countries in the Western world. However, a near-doubled proportion of nasopharyngeal Swedish H. influenzae isolates with resistance to beta-lactams has been observed in the last decade. In the present study, the epidemiology and mechanisms of antimicrobial resistance of H. influenzae isolates from blood and cerebrospinal fluid in southern Sweden from 1997 to 2010 (n = 465) were studied. Antimicrobial susceptibility testing was performed using disk diffusion, and isolates with resistance to any tested beta-lactam were further analyzed in detail. We identified a significantly increased (P = 0.03) proportion of beta-lactam-resistant invasive H. influenzae during the study period, which was mainly attributed to a significant recent increase of beta-lactamase-negative beta-lactam-resistant isolates (P = 0.04). Furthermore, invasive beta-lactamase-negative beta-lactam-resistant H. influenzae isolates from 2007 and onwards were found in higher proportions than the corresponding proportions of nasopharyngeal isolates in a national survey. Multiple-locus sequence typing (MIST) of this group of isolates did not completely separate isolates with different resistance phenotypes. However, one cluster of beta-lactamase-negative ampicillin-resistant (BLNAR) isolates was identified, and it included isolates from all geographical areas. A truncated variant of a beta-lactamase gene with a promoter deletion, bla(TEM-1)-P Delta dominated among the beta-lactamase-positive H. influenzae isolates. Our results show that the proportions of beta-lactam-resistant invasive H. influenzae have increased in Sweden in the last decade.

Published
2012

11. Calibration of fusidic acid disk diffusion susceptibility testing of Staphylococcus aureus.

Author

Olsson-Liljequist, Barbro, Koljalg, Siiri, Karlsson, Inga, and Kronvall, Goran

Subjects
MICROBIAL sensitivity tests, STAPHYLOCOCCUS aureus, ACIDS
Abstract

Presents a study that examined the disk diffusion fusidic acid susceptibility testing of Staphylococcus aureus. Methodology; Analysis of the histograms of the fusidic acid zone of clinical isolates and reference strains; Calculation of the interpretative zone breakpoints using single strain regression analysis.

Published
2002
Full Text
View/download PDF

20. Immunologic "short circuits".

Author

Kronvall, Goran, Williams, Ralph C., Kronvall, G, and Williams, R C Jr

Subjects
MOLECULAR biology, COMPLEMENT fixation, IMMUNE response
Abstract

Looks at examples of cross reactions between molecular events in different biological systems. Role of different types of antibodies in the complement-fixation process; Reaction of the human sera to strains of staphylococci; Interaction between the complement system and the coagulation process.

Published
1969
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results