Martti Vaara

Q: What Schools Are Affiliated With Martti Vaara

Martti Vaara is affiliated with the following schools: Aalto University, University of Helsinki

Martti Vaara's AcademicInfluence.com Rankings

Martti Vaara

Business

#781

World Rank

#858

Historical Rank

Management

#296

World Rank

#320

Historical Rank

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Martti Vaara's Degrees

PhD Management University of Helsinki
Masters Economics University of Helsinki
Bachelors Business Administration University of Helsinki

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Martti Vaara's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Molecular basis of bacterial outer membrane permeability. (1985) (2195)
Agents that increase the permeability of the outer membrane. (1992) (1447)
Safety of probiotics that contain lactobacilli or bifidobacteria. (2003) (547)
Lactobacillus bacteremia during a rapid increase in probiotic use of Lactobacillus rhamnosus GG in Finland. (2002) (434)
Sensitization of Gram-negative bacteria to antibiotics and complement by a nontoxic oligopeptide (1983) (215)
Group of peptides that act synergistically with hydrophobic antibiotics against gram-negative enteric bacteria (1996) (185)
Antibiotic-supersusceptible mutants of Escherichia coli and Salmonella typhimurium (1993) (177)
Increased substitution of phosphate groups in lipopolysaccharides and lipid A of the polymyxin‐resistant pmrA mutants of Salmonella typhimurium: a 31P‐NMR study (1994) (175)
Outer membrane permeability barrier to azithromycin, clarithromycin, and roxithromycin in gram-negative enteric bacteria (1993) (149)
New approaches in peptide antibiotics. (2009) (126)
Novel Polymyxin Derivatives Carrying Only Three Positive Charges Are Effective Antibacterial Agents (2008) (120)
Outer Membrane Permeability Barrier in Escherichia coli Mutants That Are Defective in the Late Acyltransferases of Lipid A Biosynthesis (1999) (117)
Etiological diagnosis of childhood pneumonia by use of transthoracic needle aspiration and modern microbiological methods. (2002) (108)
Outer Membrane Permeability Barrier Disruption by Polymyxin in Polymyxin-Susceptible and -Resistant Salmonella typhimurium (1981) (106)
Susceptibility of gram-negative bacteria to polymyxin B nonapeptide (1984) (105)
Polymyxins and their novel derivatives. (2010) (105)
The lipid A biosynthesis mutation lpxA2 of Escherichia coli results in drastic antibiotic supersusceptibility (1992) (104)
A Novel Polymyxin Derivative That Lacks the Fatty Acid Tail and Carries Only Three Positive Charges Has Strong Synergism with Agents Excluded by the Intact Outer Membrane (2010) (102)
Neonatal Candida parapsilosis outbreak with a high case fatality rate. (1995) (98)
Carbapenemase-producing Enterobacteriaceae in Finland: the first years (2008-11). (2012) (97)
Two Improved Methods for Obtaining Axenic Cultures of Cyanobacteria (1979) (94)
Eight bacterial proteins, including UDP-N-acetylglucosamine acyltransferase (LpxA) and three other transferases of Escherichia coli, consist of a six-residue periodicity theme. (1992) (93)
Potentiation of Antibiotic Activity by a Novel Cationic Peptide: Potency and Spectrum of Activity of SPR741 (2017) (92)
New 16-plex PCR method for rapid detection of diarrheagenic Escherichia coli directly from stool samples (2009) (90)
Streptococcus mutans Clonal Variation Revealed by Multilocus Sequence Typing (2007) (85)
Binding of polymyxin B nonapeptide to gram-negative bacteria (1985) (82)
Novel derivatives of polymyxins. (2013) (81)
vanA and vanB Incorporate into an Endemic Ampicillin-Resistant Vancomycin-SensitiveEnterococcus faecium Strain: Effect on Interpretation of Clonality (1999) (81)
Polymyxin Derivatives that Sensitize Gram-Negative Bacteria to Other Antibiotics (2019) (80)
New Salmonella typhimurium mutants with altered outer membrane permeability (1984) (76)
The novel hexapeptide motif found in the acyltransferases LpxA and LpxD of lipid A biosynthesis is conserved in various bacteria (1994) (67)
A quantitative polymerase chain reaction assay for rapid detection of 9 pathogens directly from stools of travelers with diarrhea. (2013) (66)
Polymyxins and Their Potential Next Generation as Therapeutic Antibiotics (2019) (62)
Partitioning of hydrophobic probes into lipopolysaccharide bilayers. (1990) (59)
Poor antibacterial effect of ropivacaine: comparison with bupivacaine. (1999) (55)
Human kidney on a chip assessment of polymyxin antibiotic nephrotoxicity. (2018) (54)
Salmonella typhimurium and Escherichia coli mutants with increased outer membrane permeability to hydrophobic compounds. (1989) (54)
Levofloxacin does not decrease mortality in Staphylococcus aureus bacteraemia when added to the standard treatment: a prospective and randomized clinical trial of 381 patients (2006) (53)
Sodium hexametaphosphate sensitizes Pseudomonas aeruginosa, several other species of Pseudomonas, and Escherichia coli to hydrophobic drugs (1989) (52)
The outer membrane permeability-increasing action of deacylpolymyxins. (1991) (50)
Isolation, cloning, and primary structure of a cationic 16-kDa outer membrane protein of Salmonella typhimurium. (1989) (50)
Distribution of streptococcal inhibitor of complement variants in pharyngitis and invasive isolates in an epidemic of serotype M1 group A Streptococcus infection. (2001) (49)
Rapid Molecular Characterization of Acinetobacter baumannii Clones with rep-PCR and Evaluation of Carbapenemase Genes by New Multiplex PCR in Hospital District of Helsinki and Uusimaa (2014) (49)
Polyamines as constituents of the outer membranes of Escherichia coli and Salmonella typhimurium (1991) (48)
Polymyxin B nonapeptide complexes with lipopolysaccharide (1983) (47)
A Novel Enzyme Application for Corn Wet Milling (1988) (45)
Effect of small cationic leukocyte peptides (defensins) on the permeability barrier of the outer membrane (1988) (45)
Overgrowth of Enterococcus faecium in the feces of patients with hematologic malignancies. (1996) (44)
Detection of virulence genes of Clostridium difficile by multiplex PCR (2009) (44)
Novel polymyxin derivatives are less cytotoxic than polymyxin B to renal proximal tubular cells (2012) (43)
Report of four cases ofYersinia pseudotuberculosis septicemia and a literature review (1995) (43)
Costs of an outbreak of meticillin-resistant Staphylococcus aureus. (2007) (42)
Accurate and Rapid Identification of Candida spp. Frequently Associated with Fungemia by Using PCR and the Microarray-Based Prove-it Sepsis Assay (2012) (42)
Efficacy of a novel PCR- and microarray-based method in diagnosis of a prosthetic joint infection (2014) (42)
Polymyxin B octapeptide and polymyxin B heptapeptide are potent outer membrane permeability-increasing agents. (1992) (41)
Burkholderia pseudomallei infections in Finnish tourists injured by the December 2004 tsunami in Thailand. (2005) (40)
Antimicrobial Susceptibilities of Campylobacter Strains Isolated from Finnish Subjects Infected Domestically or from Those Infected Abroad (2003) (40)
Molecular characterization of methicillin-resistant Staphylococcus epidermidis strains from bacteraemic patients. (2008) (39)
Interleukin 1 receptor antagonist and E-selectin concentrations: a comparison in patients with severe acute pancreatitis and severe sepsis. (1999) (38)
rfaP mutants of Salmonella typhimurium. (1989) (37)
First isolations of KPC-2-carrying ST258 Klebsiella pneumoniae strains in Finland, June and August 2009. (2009) (37)
Real‐time multiplex PCR assay for detection of Yersinia pestis and Yersinia pseudotuberculosis (2009) (36)
Pharmacokinetics of novel antimicrobial cationic peptides NAB 7061 and NAB 739 in rats following intravenous administration. (2009) (36)
Capnocytophaga canimorsus septicemia: Fifth report of a cat-associated infection and five other cases (1995) (36)
Mutation at the position 2058 of the 23S rRNA as a cause of macrolide resistance in Streptococcus pyogenes (2004) (35)
Antifungal Susceptibility and Virulence Attributes of Bloodstream Isolates of Candida from Hong Kong and Finland (2011) (34)
Persistence of a multiresistant clone of Staphylococcus epidermidis in a neonatal intensive-care unit for a four-year period. (1995) (34)
Susceptibility of carbapenemase-producing strains of Klebsiella pneumoniae and Escherichia coli to the direct antibacterial activity of NAB739 and to the synergistic activity of NAB7061 with rifampicin and clarithromycin. (2010) (34)
Antimicrobial activity of the novel polymyxin derivative NAB739 tested against Gram-negative pathogens. (2013) (33)
Shiga Toxin-Producing Escherichia coli O100:H–: stx2e in Drinking Water Contaminated by Waste Water in Finland (2011) (33)
The novel polymyxin derivative NAB739 is remarkably less cytotoxic than polymyxin B and colistin to human kidney proximal tubular cells. (2013) (33)
The Ssc protein of enteric bacteria has significant homology to the acyltransferase Lpxa of lipid A biosynthesis, and to three acetyltransferases (1991) (32)
Analysis of polyamines as their dabsyl derivatives by reversed-phase high-performance liquid chromatography. (1987) (32)
Effective Inhibition of Cardiolipin‐Binding Antibodies in Gram‐Negative Infections by Bacterial Lipopolysaccharide (1988) (31)
Structure–activity studies on novel polymyxin derivatives that carry only three positive charges (2010) (29)
Identification and sequence analysis of the gene mutated in the conditionally lethal outer membrane permeability mutant SS‐C of Salmonella typhimurium. (1991) (29)
First isolation of Clostridium difficile PCR ribotype 027 in Finland. (2007) (29)
New polymyxin derivatives that display improved efficacy in animal infection models as compared to polymyxin B and colistin (2018) (29)
Novel polymyxin derivatives are effective in treating experimental Escherichia coli peritoneal infection in mice. (2010) (29)
Mutants carrying conditionally lethal mutations in outer membrane genes omsA and firA (ssc) are phenotypically similar, and omsA is allelic to firA (1992) (28)
Intramucosal pH and endotoxin and cytokine release in severe acute pancreatitis. (2000) (28)
The outer membrane permeability-increasing action of linear analogues of polymyxin B nonapeptide. (1991) (28)
Complete sequence of the ompH gene encoding the 16-kDa cationic outer membrane protein of Salmonella typhimurium. (1990) (28)
Increased substitution of phosphate groups in lipopolysaccharides and lipid A of polymyxin-resistant mutants of Salmonella typhimurium and Escherichia coli. (1995) (27)
Chain length heterogeneity of lipopolysaccharide released from Salmonella typhimurium by ethylenediaminetetraacetic acid or polycations. (1986) (26)
Chemical structure of the lipid A component of lipopolysaccharides of the genus Pectinatus. (1994) (25)
The ompH gene of Yersinia enterocolitica: cloning, sequencing, expression, and comparison with known enterobacterial ompH sequences (1991) (25)
A selective broth enrichment combined with real‐time nuc‐mecA‐PCR in the exclusion of MRSA (2010) (25)
Comparison of repetitive extragenic palindromic sequence-based PCR with PCR ribotyping and pulsed-field gel electrophoresis in studying the clonality of Clostridium difficile. (2011) (23)
Bacteria, Phages and Septicemia (2007) (23)
The outer membrane as the penetration barrier against mupirocin in gram-negative enteric bacteria. (1992) (23)
Clinical "pneumococcal pneumonia" due to Moraxella osloensis: case report and a review. (2001) (22)
Lipid A--Target for Antibacterial Drugs (1996) (22)
The lipid A biosynthesis deficiency of the Escherichia coli antibiotic-supersensitive mutant LH530 is suppressed by a novel locus, ORF195. (1997) (21)
Comparison of risk factors and outcome in patients with Enterococcus faecalis vs Enterococcus faecium bacteraemia. (1998) (21)
Nosocomial bloodstream infections in children: an 8-year experience at a tertiary-care hospital in Finland. (2008) (21)
The outer membrane of lipid A-deficient Escherichia coli mutant LH530 has reduced levels of OmpF and leaks periplasmic enzymes. (1997) (20)
Antimicrobial susceptibility of Salmonella typhimurium carrying the outer membrane permeability mutation SS-B (1990) (20)
Bacteremia caused byBrevibacterium species in an immunocompromised patient (1995) (19)
Does polymyxin B nonapeptide increase outer membrane permeability in antibiotic supersensitive enterobacterial mutants (1985) (18)
Structure–activity studies on polymyxin derivatives carrying three positive charges only reveal a new class of compounds with strong antibacterial activity (2017) (18)
Preferential synthesis of heptaacyl lipopolysaccharide by the ssc permeability mutant of Salmonella typhimurium. (1992) (18)
Primary structure and expression of the Ssc-protein of Salmonella typhimurium. (1990) (17)
Defective biosynthesis of the lipid A component of temperature-sensitive firA (omsA) mutant of Escherichia coli. (1993) (16)
Susceptibility of gram-negative bacteria to the synergistic bactericidal action of serum and polymyxin B nonapeptide. (1986) (16)
Evaluation of a commercial MRSA assay when multiple MRSA strains are causing epidemics (2009) (15)
Polymyxin derivatives NAB739 and NAB815 are more effective than polymyxin B in murine Escherichia coli pyelonephritis (2018) (15)
Increased resistance among Staphylococcus epidermidis isolates in a large teaching hospital over a 12-year period. (1996) (15)
Reversible binding of Salmonella typhimurium lipopolysaccharides by immobilized protamine. (1987) (14)
Clonality behind the increase of multidrug-resistance among non-invasive pneumococci in Southern Finland (2012) (14)
Increase of prostate biopsy-related bacteremic complications in southern Finland, 2005–2013: a population-based analysis (2016) (14)
Comparison of the phenotypes of the lpxA and lpxD mutants of Escherichia coli. (1995) (14)
Effect of ionic strength on polymyxin resistance of pmrA mutants of Salmonella (1981) (12)
Plasma endotoxin and cytokine levels in neutropenic and non-neutropenic bacteremic patients (1995) (12)
The polymyxin derivative NAB739 is synergistic with several antibiotics against polymyxin-resistant strains of Escherichia coli, Klebsiella pneumoniae and Acinetobacter baumannii (2019) (12)
The effect of oligolysines Lys-3, Lys-4, and Lys-5 on the outer membrane permeability of Pseudomonas aeruginosa. (1990) (11)
Phosphate groups in lipopolysaccharides of Salmonella typhimurium rfaP mutants (1997) (11)
Polymyxin B nonapeptide sensitizes Escherichia coli to valinomycin and A23187 ionophores (1984) (11)
Analytical and preparative high-performance liquid chromatography of the papain-cleaved derivative of polymyxin B. (1988) (11)
Using Chemical Probes to Assess the Feasibility of Targeting SecA for Developing Antimicrobial Agents against Gram‐Negative Bacteria (2016) (11)
An outbreak of CTX-M-15 -producing Escherichia coli, Enterobacter cloacae, and Klebsiella in a children's hospital in Finland (2014) (10)
Emergence of extended-spectrum beta-lactamase-producing Escherichia coli and Klebsiella pneumoniae during the years 2000 and 2004 in Helsinki, Finland. (2010) (10)
Comparative activity of rifabutin and rifampicin against gram-negative bacteria that have damaged or defective outer membranes. (1993) (9)
Outer membrane phospholipase is not the mediator in the bactericidal or outer membrane permeability-increasing action of polycations (1983) (9)
Increased resistance amongStaphylococcus epidermidis isolates in a large teaching hospital over a 12-year period (1996) (8)
Biological activities of lipopolysaccharides from Pectinatus cerevisiophilus (1984) (8)
Lipopolysaccharides of three classes of supersensitive mutants of Salmonella typhimurium (1985) (8)
Applicability of DiversiLab repetitive sequence-based PCR method in epidemiological typing of enterohemorrhagic Escherichia coli (EHEC). (2013) (7)
Infection, anticardiolipin and thrombosis. (1987) (6)
The nucleotide and deduced amino acid sequence of the cationic 19 kDa outer membrane protein OmpH of Yersinia pseudotuberculosis. (1991) (6)
Outer membrane permeability of the antibiotic-supersusceptible lipid A mutants of Escherichia coli to hydrophobic steroid probes. (1999) (6)
Isolation and characterization of Streptococcus mitis from blood of child with osteomyelitis. (2011) (6)
Clinical isolates of Pseudomonas aeruginosa from superficial skin infections have different physiological patterns. (2013) (5)
Plasma interleukin-8, interleukin-10, and E-selectin levels in neutropenic and non-neutropenic bacteremic patients (1997) (5)
Bartonella quintana and Bartonella pediococcus Infection after Aortic Valve Replacement. (2008) (5)
LPS greatly enhances the antibody response to hapten-polysaccharide conjugates, but not to hapten-protein conjugates. (1983) (4)
Costs of outbreak of Methicillin-Resistant Staphylococcus Aureus (2007) (4)
Low levels of cytokines and endotoxin in a fatal case of myocardial depression and septic shock due to Yersinia pseudotuberculosis. (1995) (4)
Non-tuberculous Mycobacteria can Cause Disseminated Mycobacteriosis in Cats (2018) (4)
Effect of Ssc protein mutations on the outer membrane permeability barrier function in Salmonella typhimurium: a study using ssc mutant alleles made by site-directed mutagenesis. (1992) (4)
Emergence of ESBL-producing Escherichia coli and Klebsiella pneumoniae isolates during the years 2000 and 2004 in Helsinki, Finland (2009) (3)
[Yersinia Pseudotuberculosis, a rare cause of septicemia]. (1996) (3)
[New antibacterial agents]. (1999) (3)
In vitro activity of antifungal azoles againstHelicobacter pylori (1992) (3)
Evaluation of Antimicrobial Therapy of Blood Culture Positive Healthcare-Associated Infections in Children (2015) (2)
Quantitative antimicrobial susceptibility testing of outer membrane-altered mutant bacteria by the E test. (1993) (2)
Comparative activity of tigecycline and tetracycline on Gram-negative and Gram-positive bacteria revealed by a multicentre study in four North European countries (2011) (2)
Do salicylates and ascorbate increase the outer membrane permeability to hydrophobic antibiotics in Pseudomonas aeruginosa? (1990) (2)
Lipopolysaccharide and the Permeability of the Bacterial Outer Membrane (2020) (2)
Polymyxins Targeting the Outer Membrane of Gram-negative Bacteria (2016) (2)
Clonality behind the increase of multidrug-resistance among non-invasive pneumococci in Southern Finland (2011) (1)
Susceptibility and virulent attributes of Candida from Hong Kong and Finland (2010) (1)
enteric bacteria. hydrophobic antibiotics against gram-negative Group of peptides that act synergistically with (2013) (1)
Antimicrobial Resistance in Finland - Finres 1997-2010 (2013) (1)
Excretion of the Polymyxin Derivative NAB739 in Murine Urine (2020) (1)
Polymyxinderivat and uses thereof (2016) (1)
Disseminated Mycobacterium malmoense Infection in a Cat (2016) (1)
Susceptibility ofGram-Negative Bacteria toPolymyxin B Nonapeptide (1984) (1)
Old and Novel Polymyxins Against Serious Gram-Negative Infections (2014) (1)
Pneumococcal serotype distribution in invasive paediatric disease in Southern Finland before the introduction of vaccine (2010) (1)
[Listening at Tosca on the balcony. The secret of heavenly sound--a randomized, cross-sectional study]. (2003) (1)
P-NMR characterization of lipopolysaccharide released from Salmonella typhimurium by ethylenediaminetetraacetic acid (1999) (0)
In-vitro and in-vivo activity of novel polymyxin derivatives in combination with other antimicrobial agents against multi-drug resistant Acinetobacter baumannii (MDRAB) (2013) (0)
156 Increasing incidence of blood-culture positive infectious complications following transrectal prostate biopsies (2016) (0)
[Development of antibacterial drugs]. (1991) (0)
Polymyxin derivatives and applications thereof (2007) (0)
Water-soluble enzymatic hydrolyzate of a cellulose derivative as well as the process for its preparation (1990) (0)
Short Communication BACILLUS SUB TILIS TmrB PROTEIN CONFERS RESISTANCE TO TUNICAMYCIN ON ESCHERICHIA COLI (2006) (0)
[The diseases of the future]. (1997) (0)
[Postpartum gas gangrene]. (1993) (0)
Distribution of streptococcal inhibitor of compelement variants in pharyngitis and invasive isolates in an epidemic of serotype M1 Group A (2001) (0)
Polymyxin derivatives and their uses (2007) (0)
P3.11 Epidemiology of Extended-Spectrum Beta-Lactamase (ESBL) Producing Escherichia Coli (E. coli) in Helsinki City in 2000-2004 (2006) (0)
[Sources for antibacterial drugs are not drying up]. (1998) (0)
Macerate procedure for cereals with a new enzyme preparation. (1988) (0)
Performance evaluation and further development of the PCR and microarray-based Prove-it™ Sepsis assay (2009) (0)
Hydrolyzate of cellulose derivative and production thereof (1990) (0)
[Not Available]. (2007) (0)
[Penicillin-resistant pneumococci are coming--are you prepared?]. (1994) (0)
Influence of severity of illness on the effects of eritoran tetrasodium ( E 5564 ) , a TLR 4 antagonist , in patients with severe sepsis (2015) (0)
[Evolution of pathogenic micro-organisms as a challenge for medicine]. (2009) (0)
Corrigendum: Polymyxins and Their Potential Next Generation as Therapeutic Antibiotics (2019) (0)
Future diagnosis of sepsis – Authors' reply (2010) (0)
Antimikrobiellejä and antiinflammatory compounds (1996) (0)
Research letterLipopolysaccharides of three classes of supersensitive mutants of Salmonella typhimurium (1985) (0)
A method for dissolving and processing of corn and sorghum (1988) (0)
[Not Available]. (2007) (0)
Method of producing isolates and soy protein concentrates low in phytate and phytate free. (1990) (0)
[Endocarditis caused by Gemella bacteria infection]. (2006) (0)
A method of soaking of cereal with a new enzyme composition. (1988) (0)
Comparison of different methicillin-resistant Staphylococcus aureus (MRSA) typing methods when poorly distinguishable isolates are causing epidemics (2011) (0)
Polymyksiinijohdannaiset, which is a short fatty acid tail, and uses thereof (2008) (0)

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What Schools Are Affiliated With Martti Vaara?

Martti Vaara is affiliated with the following schools:

Martti Vaara's Academic­Influence.com Rankings