Publication list - Publika - Scientific publications from Oslo University Hospital

Publications by Peter Gaustad

137 publications found

Original articles

Ganan M, Lorentzen SB, Gaustad P, Sørlie M (2021)
Synergistic Antifungal Activity of Chito-Oligosaccharides and Commercial Antifungals on Biofilms of Clinical Candida Isolates
J Fungi (Basel), 7 (9)
DOI 10.3390/jof7090718, PubMed 34575756

Gilboe HM, Reiakvam OM, Aasen L, Tjade T, Bjerner J, Ranheim TE, Gaustad P (2021)
Rapid diagnosis and reduced workload for urinary tract infection using flowcytometry combined with direct antibiotic susceptibility testing
PLoS One, 16 (7), e0254064
DOI 10.1371/journal.pone.0254064, PubMed 34228764

Lanternier F, Seidel D, Pagano L, Styczynski J, Mikulska M, Pulcini C, Maertens J, Munoz P, Garcia-Vidal C, Rijnders B, Arendrup MC, Sabino R, Verissimo C, Gaustad P, Klimko N, Arikan-Akdagli S, Arsic V, Barac A, Skiada A, Klingspor L, Herbrecht R, Donnelly P, Cornely OA, Lass-Flörl C, Lortholary O (2020)
Invasive pulmonary aspergillosis treatment duration in haematology patients in Europe: An EFISG, IDWP-EBMT, EORTC-IDG and SEIFEM survey
Mycoses, 63 (5), 420-429
DOI 10.1111/myc.13056, PubMed 32009262

Ganan M, Lorentzen SB, Aam BB, Eijsink VGH, Gaustad P, Sørlie M (2019)
Antibiotic saving effect of combination therapy through synergistic interactions between well-characterized chito-oligosaccharides and commercial antifungals against medically relevant yeasts
PLoS One, 14 (12), e0227098
DOI 10.1371/journal.pone.0227098, PubMed 31891619

Hesstvedt L, Gaustad P, Müller F, Torp Andersen C, Brunborg C, Mylvaganam H, Leiva RA, Berdal JE, Egil Ranheim T, Johnsen BO, Falch BM, Grimnes G, Skogen V, Haarr E, Sandmo Lyngøy A, Wik Larssen K, Hannula R, Åsheim Hansen B, Nordøy I, Norwegian Fungal Network (2019)
The impact of age on risk assessment, therapeutic practice and outcome in candidemia
Infect Dis (Lond), 51 (6), 425-434
DOI 10.1080/23744235.2019.1595709, PubMed 31010380

Ganan M, Lorentzen SB, Agger JW, Heyward CA, Bakke O, Knutsen SH, Aam BB, Eijsink VGH, Gaustad P, Sørlie M (2019)
Antifungal activity of well-defined chito-oligosaccharide preparations against medically relevant yeasts
PLoS One, 14 (1), e0210208
DOI 10.1371/journal.pone.0210208, PubMed 30620751

Rehbinder EM, Lødrup Carlsen KC, Staff AC, Angell IL, Landrø L, Hilde K, Gaustad P, Rudi K (2018)
Is amniotic fluid of women with uncomplicated term pregnancies free of bacteria?
Am J Obstet Gynecol, 219 (3), 289.e1-289.e12
DOI 10.1016/j.ajog.2018.05.028, PubMed 29852156

Johnsen BO, Handal N, Meisal R, Bjørnholt JV, Gaustad P, Leegaard TM (2017)
erm gene distribution among Norwegian Bacteroides isolates and evaluation of phenotypic tests to detect inducible clindamycin resistance in Bacteroides species
Anaerobe, 47, 226-232
DOI 10.1016/j.anaerobe.2017.06.004, PubMed 28602805

Håvelsrud OE, Gaustad P (2017)
Draft Genome Sequences of Candida glabrata Isolates 1A, 1B, 2A, 2B, 3A, and 3B
Genome Announc, 5 (10)
DOI 10.1128/genomeA.00328-16, PubMed 28280017

Andersen KM, Kristoffersen AK, Ingebretsen A, Vikholt KJ, Örtengren UT, Olsen I, Enersen M, Gaustad P (2016)
Diversity and antifungal susceptibility of Norwegian Candida glabrata clinical isolates
J Oral Microbiol, 8, 29849
DOI 10.3402/jom.v8.29849, PubMed 26861194

Høyvoll LR, Fløisand Y, Orrem HL, Gunnarsson R, Landrø L, Brevig T, Gaustad P, Nordøy I (2015)
Hemophagocytic lymphohistiocytosis in leprosy
Lepr Rev, 86 (4), 403-6
PubMed 26964439

Gurung I, Spielman I, Davies MR, Lala R, Gaustad P, Biais N, Pelicic V (2015)
Functional analysis of an unusual type IV pilus in the Gram-positive Streptococcus sanguinis
Mol Microbiol, 99 (2), 380-92
DOI 10.1111/mmi.13237, PubMed 26435398

Hesstvedt L, Gaustad P, Andersen CT, Haarr E, Hannula R, Haukland HH, Hermansen NO, Larssen KW, Mylvaganam H, Ranheim TE, Sandven P, Nordøy I, Norwegian Yeast Study Group, Kanestrøm A, Grub C, Onken A, Thielsen C, Skaare D, Tofteland S, Sønsteby LJ, Hjetland R, Hide R, Vik E, Kümmel A, Åsheim S (2015)
Twenty-two years of candidaemia surveillance: results from a Norwegian national study
Clin Microbiol Infect, 21 (10), 938-45
DOI 10.1016/j.cmi.2015.06.008, PubMed 26093076

Berents TL, Carlsen KC, Mowinckel P, Skjerven HO, Kvenshagen B, Rolfsjord LB, Bradley M, Lieden A, Carlsen KH, Gaustad P, Gjersvik P (2015)
Skin Barrier Function and Staphylococcus aureus Colonization in Vestibulum Nasi and Fauces in Healthy Infants and Infants with Eczema: A Population-Based Cohort Study
PLoS One, 10 (6), e0130145
DOI 10.1371/journal.pone.0130145, PubMed 26070153

van der Linden JW, Arendrup MC, Warris A, Lagrou K, Pelloux H, Hauser PM, Chryssanthou E, Mellado E, Kidd SE, Tortorano AM, Dannaoui E, Gaustad P, Baddley JW, Uekötter A, Lass-Flörl C, Klimko N, Moore CB, Denning DW, Pasqualotto AC, Kibbler C, Arikan-Akdagli S, Andes D, Meletiadis J, Naumiuk L, Nucci M et al. (2015)
Prospective multicenter international surveillance of azole resistance in Aspergillus fumigatus
Emerg Infect Dis, 21 (6), 1041-4
DOI 10.3201/eid2106.140717, PubMed 25988348

Berents TL, Rønnevig J, Søyland E, Gaustad P, Nylander G, Løland BF (2015)
Topical treatment with fresh human milk versus emollient on atopic eczema spots in young children: a small, randomized, split body, controlled, blinded pilot study
BMC Dermatol, 15, 7
DOI 10.1186/s12895-015-0027-9, PubMed 25935520

Heggelund L, Gaustad P, Håvelsrud OE, Blom J, Borgen L, Sundset A, Sørum H, Frøland SS (2015)
Corynebacterium pseudotuberculosis Pneumonia in a Veterinary Student Infected During Laboratory Work
Open Forum Infect Dis, 2 (2), ofv053
DOI 10.1093/ofid/ofv053, PubMed 26380345

Håvelsrud OE, Sørum H, Gaustad P (2014)
Genome Sequences of Corynebacterium pseudotuberculosis Strains 48252 (Human, Pneumonia), CS_10 (Lab Strain), Ft_2193/67 (Goat, Pus), and CCUG 27541
Genome Announc, 2 (5)
DOI 10.1128/genomeA.00869-14, PubMed 25189581

Husøy MA, Brinch L, Tjønnfjord GE, Gedde-Dahl T, Heldal D, Holme PA, Dybedal I, Kolstad A, Akkök ÇA, Rollag H, Gaustad P, Bergan S, Egeland T, Josefsen D, Kvalheim G, Fløisand Y (2014)
[Allogeneic stem-cell transplantation in adults 1985-2012: results and development]
Tidsskr Nor Laegeforen, 134 (16), 1569-75
DOI 10.4045/tidsskr.13.1415, PubMed 25178233

Kommedal Ø, Wilhelmsen MT, Skrede S, Meisal R, Jakovljev A, Gaustad P, Hermansen NO, Vik-Mo E, Solheim O, Ambur OH, Sæbø Ø, Høstmælingen CT, Helland C (2014)
Massive parallel sequencing provides new perspectives on bacterial brain abscesses
J Clin Microbiol, 52 (6), 1990-7
DOI 10.1128/JCM.00346-14, PubMed 24671797

Melby KK, Olsen AO, Dedi L, Gaustad P, Syversen G, Moi H (2014)
[The development of resistance must be monitored--gonococci as an example]
Tidsskr Nor Laegeforen, 134 (5), 507-8
DOI 10.4045/tidsskr.14.0033, PubMed 24621906

Espinel-Ingroff A, Arendrup MC, Pfaller MA, Bonfietti LX, Bustamante B, Canton E, Chryssanthou E, Cuenca-Estrella M, Dannaoui E, Fothergill A, Fuller J, Gaustad P, Gonzalez GM, Guarro J, Lass-Flörl C, Lockhart SR, Meis JF, Moore CB, Ostrosky-Zeichner L, Pelaez T, Pukinskas SR, St-Germain G, Szeszs MW, Turnidge J (2013)
Interlaboratory variability of Caspofungin MICs for Candida spp. Using CLSI and EUCAST methods: should the clinical laboratory be testing this agent?
Antimicrob Agents Chemother, 57 (12), 5836-42
DOI 10.1128/AAC.01519-13, PubMed 24018263

Lobato-Pascual A, Saether PC, Dahle MK, Gaustad P, Dissen E, Fossum S, Daws MR (2013)
Rat macrophage C-type lectin is an activating receptor expressed by phagocytic cells
PLoS One, 8 (2), e57406
DOI 10.1371/journal.pone.0057406, PubMed 23468983

Reikvam DH, Derrien M, Islam R, Erofeev A, Grcic V, Sandvik A, Gaustad P, Meza-Zepeda LA, Jahnsen FL, Smidt H, Johansen FE (2012)
Epithelial-microbial crosstalk in polymeric Ig receptor deficient mice
Eur J Immunol, 42 (11), 2959-70
DOI 10.1002/eji.201242543, PubMed 22865203

Gammelsrud KW, Lindstad BL, Gaustad P, Ingebretsen A, Høiby EA, Brandtzaeg P, Sandven P (2012)
Multilocus sequence typing of serial Candida albicans isolates from children with cancer, children with cystic fibrosis and healthy controls
Med Mycol, 50 (6), 619-26
DOI 10.3109/13693786.2012.675088, PubMed 22524637

Gammelsrud KW, Sandven P, Høiby EA, Sandvik L, Brandtzaeg P, Gaustad P (2011)
Colonization by Candida in children with cancer, children with cystic fibrosis, and healthy controls
Clin Microbiol Infect, 17 (12), 1875-81
DOI 10.1111/j.1469-0691.2011.03528.x, PubMed 21745258

Vestrheim DF, Gaustad P, Aaberge IS, Caugant DA (2011)
Pherotypes of pneumococcal strains co-existing in healthy children
Infect Genet Evol, 11 (7), 1703-8
DOI 10.1016/j.meegid.2011.07.003, PubMed 21763465

Skiada A, Pagano L, Groll A, Zimmerli S, Dupont B, Lagrou K, Lass-Florl C, Bouza E, Klimko N, Gaustad P, Richardson M, Hamal P, Akova M, Meis JF, Rodriguez-Tudela JL, Roilides E, Mitrousia-Ziouva A, Petrikkos G, European Confederation of Medical Mycology Working Group on Zygomycosis (2011)
Zygomycosis in Europe: analysis of 230 cases accrued by the registry of the European Confederation of Medical Mycology (ECMM) Working Group on Zygomycosis between 2005 and 2007
Clin Microbiol Infect, 17 (12), 1859-67
DOI 10.1111/j.1469-0691.2010.03456.x, PubMed 21199154

Reikvam DH, Erofeev A, Sandvik A, Grcic V, Jahnsen FL, Gaustad P, McCoy KD, Macpherson AJ, Meza-Zepeda LA, Johansen FE (2011)
Depletion of murine intestinal microbiota: effects on gut mucosa and epithelial gene expression
PLoS One, 6 (3), e17996
DOI 10.1371/journal.pone.0017996, PubMed 21445311

Zinöcker S, Wang MY, Gaustad P, Kvalheim G, Rolstad B, Vaage JT (2011)
Mycoplasma contamination revisited: mesenchymal stromal cells harboring Mycoplasma hyorhinis potently inhibit lymphocyte proliferation in vitro
PLoS One, 6 (1), e16005
DOI 10.1371/journal.pone.0016005, PubMed 21264307

Warris A, Onken A, Gaustad P, Janssen W, van der Lee H, Verweij PE, Abrahamsen TG (2010)
Point-of-use filtration method for the prevention of fungal contamination of hospital water
J Hosp Infect, 76 (1), 56-9
DOI 10.1016/j.jhin.2010.03.014, PubMed 20542590

Dannaoui E, Schwarz P, Slany M, Loeffler J, Jorde AT, Cuenca-Estrella M, Hauser PM, Shrief R, Huerre M, Freiberger T, Gaustad P, Rodriguez-Tudela JL, Bille J, Denning DW, Bretagne S, Lortholary O (2010)
Molecular detection and identification of zygomycetes species from paraffin-embedded tissues in a murine model of disseminated zygomycosis: a collaborative European Society of Clinical Microbiology and Infectious Diseases (ESCMID) Fungal Infection Study Group (EFISG) evaluation
J Clin Microbiol, 48 (6), 2043-6
DOI 10.1128/JCM.02319-09, PubMed 20375233

Leegaard TM, Bootsma HJ, Caugant DA, Eleveld MJ, Mannsåker T, Frøholm LO, Gaustad P, Høiby EA, Hermans PWM (2009)
Phenotypic and genomic characterization of pneumococcus-like streptococci isolated from HIV-seropositive patients
Microbiology (Reading), 156 (Pt 3), 838-848
DOI 10.1099/mic.0.035345-0, PubMed 19959577

Lobmaier IV, Vege A, Gaustad P, Rognum TO (2009)
Bacteriological investigation--significance of time lapse after death
Eur J Clin Microbiol Infect Dis, 28 (10), 1191-8
DOI 10.1007/s10096-009-0762-0, PubMed 19504136

Fredheim EG, Klingenberg C, Rohde H, Frankenberger S, Gaustad P, Flaegstad T, Sollid JE (2009)
Biofilm formation by Staphylococcus haemolyticus
J Clin Microbiol, 47 (4), 1172-80
DOI 10.1128/JCM.01891-08, PubMed 19144798

Thorgersen EB, Pharo A, Haverson K, Axelsen AK, Gaustad P, Kotwal GJ, Sfyroera G, Mollnes TE (2008)
Inhibition of complement and CD14 attenuates the Escherichia coli-induced inflammatory response in porcine whole blood
Infect Immun, 77 (2), 725-32
DOI 10.1128/IAI.01305-08, PubMed 19047409

Castellheim A, Thorgersen EB, Hellerud BC, Pharo A, Johansen HT, Brosstad F, Gaustad P, Brun H, Fosse E, Tønnessen TI, Nielsen EW, Mollnes TE (2008)
New biomarkers in an acute model of live Escherichia coli-induced sepsis in pigs
Scand J Immunol, 68 (1), 75-84
DOI 10.1111/j.1365-3083.2008.02122.x, PubMed 18466195

Riise ØR, Lee A, Cvancarova M, Handeland KS, Wathne KO, Nakstad B, Gaustad P, Flatø B (2008)
Recent-onset childhood arthritis--association with Streptococcus pyogenes in a population-based study
Rheumatology (Oxford), 47 (7), 1006-11
DOI 10.1093/rheumatology/ken122, PubMed 18420659

Winn RM, Warris A, Gaustad P, Abrahamsen TG (2007)
The effect of antifungal agents and human monocytes on in vitro galactomannan release by Aspergillus spp. in liquid culture medium
APMIS, 115 (12), 1364-9
DOI 10.1111/j.1600-0463.2007.00719.x, PubMed 18184406

Hageskal G, Gaustad P, Heier BT, Skaar I (2007)
Occurrence of moulds in drinking water
J Appl Microbiol, 102 (3), 774-80
DOI 10.1111/j.1365-2672.2006.03119.x, PubMed 17309627

Arendrup MC, Chryssanthou E, Gaustad P, Koskela M, Sandven P, Fernandez V (2007)
Diagnostics of fungal infections in the Nordic countries: we still need to improve!
Scand J Infect Dis, 39 (4), 337-43
DOI 10.1080/00365540601071859, PubMed 17454898

Stray-Pedersen A, Gaustad P, Stray-Pedersen B, Rognum TO (2007)
Detection rate of Helicobacter pylori stool antigen in newborn infants and small children
J Perinat Med, 35 (2), 155-8
DOI 10.1515/JPM.2007.040, PubMed 17343545

Hageskal G, Knutsen AK, Gaustad P, de Hoog GS, Skaar I (2006)
Diversity and significance of mold species in Norwegian drinking water
Appl Environ Microbiol, 72 (12), 7586-93
DOI 10.1128/AEM.01628-06, PubMed 17028226

Bajanowski T, Vege A, Byard RW, Krous HF, Arnestad M, Bachs L, Banner J, Blair PS, Borthne A, Dettmeyer R, Fleming P, Gaustad P, Gregersen M, Grøgaard J, Holter E, Isaksen CV, Jorgensen JV, de Lange C, Madea B, Moore I, Morland J, Opdal SH, Råsten-Almqvist P, Schlaud M, Sidebotham P et al. (2006)
Sudden infant death syndrome (SIDS)--standardised investigations and classification: recommendations
Forensic Sci Int, 165 (2-3), 129-43
DOI 10.1016/j.forsciint.2006.05.028, PubMed 16806765

Sandven P, Bevanger L, Digranes A, Haukland HH, Mannsåker T, Gaustad P, Norwegian Yeast Study Group (2006)
Candidemia in Norway (1991 to 2003): results from a nationwide study
J Clin Microbiol, 44 (6), 1977-81
DOI 10.1128/JCM.00029-06, PubMed 16757587

Naess-Andresen CF, Walberg M, Gaustad P (2006)
In vitro activity of a cytotoxic factor isolated from human leukocytes
APMIS, 114 (6), 428-35
DOI 10.1111/j.1600-0463.2006.apm_282.x, PubMed 16856964

Lehne G, Haneberg B, Gaustad P, Johansen PW, Preus H, Abrahamsen TG (2006)
Oral administration of a new soluble branched beta-1,3-D-glucan is well tolerated and can lead to increased salivary concentrations of immunoglobulin A in healthy volunteers
Clin Exp Immunol, 143 (1), 65-9
DOI 10.1111/j.1365-2249.2005.02962.x, PubMed 16367935

Walberg M, Mørk C, Sandven P, Jorde AT, Bjørås M, Gaustad P (2006)
18S rDNA polymerase chain reaction and sequencing in onychomycosis diagnostics
Acta Derm Venereol, 86 (3), 223-6
DOI 10.2340/00015555-0077, PubMed 16710579

Warris A, Netea MG, Verweij PE, Gaustad P, Kullberg BJ, Weemaes CM, Abrahamsen TG (2005)
Cytokine responses and regulation of interferon-gamma release by human mononuclear cells to Aspergillus fumigatus and other filamentous fungi
Med Mycol, 43 (7), 613-21
DOI 10.1080/13693780500088333, PubMed 16396246

Sandven P, Gaustad P (2005)
[Has medical mycology a future in Norway?]
Tidsskr Nor Laegeforen, 125 (5), 621
PubMed 15776044

Klingenberg C, Sundsfjord A, Rønnestad A, Mikalsen J, Gaustad P, Flaegstad T (2004)
Phenotypic and genotypic aminoglycoside resistance in blood culture isolates of coagulase-negative staphylococci from a single neonatal intensive care unit, 1989-2000
J Antimicrob Chemother, 54 (5), 889-96
DOI 10.1093/jac/dkh453, PubMed 15471996

Simonsen GS, Bergh K, Bevanger L, Digranes A, Gaustad P, Melby KK, Høiby EA (2004)
Susceptibility to quinupristin-dalfopristin and linezolid in 839 clinical isolates of Gram-positive cocci from Norway
Scand J Infect Dis, 36 (4), 254-8
DOI 10.1080/00365540410019570, PubMed 15198180

Warris A, Klaassen CH, Meis JF, De Ruiter MT, De Valk HA, Abrahamsen TG, Gaustad P, Verweij PE (2003)
Molecular epidemiology of Aspergillus fumigatus isolates recovered from water, air, and patients shows two clusters of genetically distinct strains
J Clin Microbiol, 41 (9), 4101-6
DOI 10.1128/JCM.41.9.4101-4106.2003, PubMed 12958232

Warris A, Netea MG, Wang JE, Gaustad P, Kullberg BJ, Verweij PE, Abrahamsen TG (2003)
Cytokine release in healthy donors and patients with chronic granulomatous disease upon stimulation with Aspergillus fumigatus
Scand J Infect Dis, 35 (8), 482-7
DOI 10.1080/00365540310013009, PubMed 14514148

Synnestvedt M, Müller F, Gaustad P, Bucher A (2003)
Recurrent group A Streptococcal genital infection after Puerperal sepsis
Scand J Infect Dis, 35 (8), 509-10
DOI 10.1080/00365540310013261, PubMed 14514155

Farstad H, Gaustad P, Kristiansen P, Perminov G, Abrahamsen TG (2003)
Cerebral venous thrombosis and Escherichia coli infection in neonates
Acta Paediatr, 92 (2), 254-7
DOI 10.1111/j.1651-2227.2003.tb00537.x, PubMed 12710657

Taffa N, Bjune G, Sundby J, Gaustad P, Alestrøm A (2002)
Prevalence of gonococcal and chlamydial infections and sexual risk behavior among youth in Addis Ababa, Ethiopia
Sex Transm Dis, 29 (12), 828-33
DOI 10.1097/00007435-200212000-00015, PubMed 12466727

Ween O, Teigen S, Gaustad P, Kilian M, Håvarstein LS (2002)
Competence without a competence pheromone in a natural isolate of Streptococcus infantis
J Bacteriol, 184 (13), 3426-32
DOI 10.1128/JB.184.13.3426-3432.2002, PubMed 12057935

Warris A, Gaustad P, Meis JF, Voss A, Verweij PE, Abrahamsen TG (2001)
Recovery of filamentous fungi from water in a paediatric bone marrow transplantation unit
J Hosp Infect, 47 (2), 143-8
DOI 10.1053/jhin.2000.0876, PubMed 11170779

Hartmann A, Halvorsen CE, Jenssen T, Bjørneklett A, Brekke IB, Bakke SJ, Hirschberg H, Tønjum T, Gaustad P (2000)
Intracerebral abscess caused by Nocardia otitidiscaviarum in a renal transplant patient--cured by evacuation plus antibiotic therapy
Nephron, 86 (1), 79-83
DOI 10.1159/000045716, PubMed 10971157

Olbjørn C, Bjørnvold M, Wathne KO, Gaustad P, Abrahamsen TG (2000)
[Tuberculosis in Norwegian children--diagnostic challenges]
Tidsskr Nor Laegeforen, 120 (15), 1721-5
PubMed 10904656

Medhus AW, Bondi J, Gaustad P, Husebye E (2000)
Low-dose intravenous erythromycin: effects on postprandial and fasting motility of the small bowel
Aliment Pharmacol Ther, 14 (2), 233-40
DOI 10.1046/j.1365-2036.2000.00693.x, PubMed 10651665

Warris A, Wesenberg F, Gaustad P, Verweij PE, Abrahamsen TG (2000)
Acremonium strictum fungaemia in a paediatric patient with acute leukaemia
Scand J Infect Dis, 32 (4), 442-4
DOI 10.1080/003655400750045132, PubMed 10959664

Ween O, Gaustad P, Håvarstein LS (1999)
Identification of DNA binding sites for ComE, a key regulator of natural competence in Streptococcus pneumoniae
Mol Microbiol, 33 (4), 817-27
DOI 10.1046/j.1365-2958.1999.01528.x, PubMed 10447890

Rønnestad A, Abrahamsen TG, Gaustad P, Finne PH (1999)
C-reactive protein (CRP) response patterns in neonatal septicaemia
APMIS, 107 (6), 593-600
DOI 10.1111/j.1699-0463.1999.tb01597.x, PubMed 10379687

Torfoss D, Aukrust P, Brinch L, Mathiesen O, Simonsen GS, Axelsen AK, Gaustad P (1999)
Carrier rate of resistant enterococci in a tertiary care hospital in Norway
APMIS, 107 (6), 545-9
DOI 10.1111/j.1699-0463.1999.tb01591.x, PubMed 10379681

Walberg M, Gaustad P, Steen HB (1999)
Uptake kinetics of nucleic acid targeting dyes in S. aureus, E. faecalis and B. cereus: a flow cytometric study
J Microbiol Methods, 35 (2), 167-76
DOI 10.1016/s0167-7012(98)00118-3, PubMed 10192050

Rønnestad A, Abrahamsen TG, Gaustad P, Finne PH (1999)
Antibiotic susceptibility of blood culture isolates after nearly two decades with netilmicin and ampicillin in neonatal septicaemia
APMIS, 107 (2), 257-62
DOI 10.1111/j.1699-0463.1999.tb01552.x, PubMed 10225325

Walberg M, Gaustad P, Steen HB (1998)
Rapid preparation procedure for staining of exponentially growing P-vulgaris cells with ethidium bromide: a flow cytometry-based study of probe uptake under various conditions
J. Microbiol. Methods, 34 (1), 49-58
DOI 10.1016/S0167-7012(98)00072-4

Haug CJ, Gaustad P, Müller F (1998)
Radiometric quantification of Mycobacterium avium complex
Eur J Clin Microbiol Infect Dis, 17 (6), 388-90
DOI 10.1007/BF01691566, PubMed 9758276

Bergan T, Gaustad P, Høiby EA, Berdal BP, Furuberg G, Baann J, Tønjum T (1998)
Antibiotic resistance of pneumococci in Norway
Int J Antimicrob Agents, 10 (1), 77-81
DOI 10.1016/s0924-8579(98)00018-1, PubMed 9624547

Rønnestad A, Abrahamsen TG, Gaustad P, Finne PH (1998)
Blood culture isolates during 6 years in a tertiary neonatal intensive care unit
Scand J Infect Dis, 30 (3), 245-51
DOI 10.1080/00365549850160873, PubMed 9790131

Lindbråthen A, Gaustad P, Hovig B, Tønjum T (1997)
Direct detection of Mycobacterium tuberculosis complex in clinical samples from patients in Norway by ligase chain reaction
J Clin Microbiol, 35 (12), 3248-53
DOI 10.1128/jcm.35.12.3248-3253.1997, PubMed 9399528

Walberg M, Gaustad P, Steen HB (1997)
Rapid discrimination of bacterial species with different ampicillin susceptibility levels by means of flow cytometry
Cytometry, 29 (3), 267-72
DOI 10.1002/(SICI)1097-0320(19971101)29:3<267::AID-CYTO10>3.3.CO;2-0, PubMed 9389444

Håvarstein LS, Hakenbeck R, Gaustad P (1997)
Natural competence in the genus Streptococcus: evidence that streptococci can change pherotype by interspecies recombinational exchanges
J Bacteriol, 179 (21), 6589-94
DOI 10.1128/jb.179.21.6589-6594.1997, PubMed 9352904

Walberg M, Gaustad P, Steen HB (1997)
Rapid assessment of ceftazidime, ciprofloxacin, and gentamicin susceptibility in exponentially-growing E. coli cells by means of flow cytometry
Cytometry, 27 (2), 169-78
PubMed 9012384

Gaustad P, Håvardstein LS (1997)
Competence-pheromone in Streptococcus sanguis. Identification of the competence gene comC and the competence pheromone
Adv Exp Med Biol, 418, 1019-21
PubMed 9331824

Håvarstein LS, Gaustad P, Nes IF, Morrison DA (1996)
Identification of the streptococcal competence-pheromone receptor
Mol Microbiol, 21 (4), 863-9
DOI 10.1046/j.1365-2958.1996.521416.x, PubMed 8878047

Walberg M, Gaustad P, Steen HB (1996)
Rapid flow cytometric assessment of mecillinam and ampicillin bacterial susceptibility
J Antimicrob Chemother, 37 (6), 1063-75
DOI 10.1093/jac/37.6.1063, PubMed 8836810

Meidell NK, Mork J, Gaustad P, Aaløkken TM (1995)
[Fulminant fasciitis in the head and neck region]
Tidsskr Nor Laegeforen, 115 (20), 2533-4
PubMed 7676416

Høgåsen AK, Abrahamsen TG, Gaustad P (1995)
Various Candida and Torulopsis species differ in their ability to induce the production of C3, factor B and granulocyte-macrophage colony-stimulating factor (GM-CSF) in human monocyte cultures
J Med Microbiol, 42 (4), 291-8
DOI 10.1099/00222615-42-4-291, PubMed 7707338

Skaar I, Gaustad P, Tønjum T, Holm B, Stenwig H (1994)
Streptococcus phocae sp. nov., a new species isolated from clinical specimens from seals
Int J Syst Bacteriol, 44 (4), 646-50
DOI 10.1099/00207713-44-4-646, PubMed 7981096

Hansen TW, Gaustad P, Abrahamsen TG, Finne PH (1993)
[Diagnosis and treatment of infections in a neonatal unit--bacterial and fungal infections]
Tidsskr Nor Laegeforen, 113 (14), 1730-4
PubMed 8322303

Hansen TW, Gaustad P, Rollag H, Abrahamsen TG, Finne PH (1993)
[Diagnosis and treatment of infections in a neonatal unit--viral infections, spirochete infections and toxoplasma infections]
Tidsskr Nor Laegeforen, 113 (14), 1701-5
PubMed 8322295

Abrahamsen TG, Gaustad P, Sund S, Hansen TW (1992)
[Disseminated fungal infections in neonates--risk factors, treatment and course]
Tidsskr Nor Laegeforen, 112 (28), 3548-51
PubMed 1462324

Abrahamsen TG, Widing E, Glomstein A, Gaustad P (1992)
Disseminated fungal disease resistant to fluconazole treatment in a child with leukemia
Scand J Infect Dis, 24 (3), 391-3
DOI 10.3109/00365549209061349, PubMed 1509246

Helsing P, Gaustad P (1992)
Bullous impetigo caused by group A streptococci. A case report
Acta Derm Venereol, 72 (1), 50-1
PubMed 1350146

Gaustad P, Hjortdahl P (1991)
[Use of streptococcal antigen tests in acute tonsillitis]
Tidsskr Nor Laegeforen, 111 (9), 1130-1
PubMed 2024263

Boye NP, Gaustad P (1991)
Double-blind comparative study of ofloxacin (Hoe 280) and trimethoprim-sulfamethoxazole in the treatment of patients with acute exacerbations of chronic bronchitis and chronic obstructive lung disease
Infection, 19 Suppl 7, S388-90
DOI 10.1007/BF01715834, PubMed 1804789

Halstensen A, Brandtzaeg P, Andrew M, Høiby EA, Hjortdahl P, Gaustad P (1990)
[Treatment of infections caused by group A beta-hemolytic streptococci]
Tidsskr Nor Laegeforen, 110 (20), 2637-40
PubMed 2120791

Høiby EA, Gaustad P, Aasen S, Martin PR (1990)
[Diseases caused by Streptococcus pyogenes in Norway, 1975-1989. A microbiologic and epidemiologic survey]
Tidsskr Nor Laegeforen, 110 (20), 2625-8
PubMed 2219026

Brandtzaeg P, Gaustad P, Vanberg PJ, Medbø S, Ledaal P, Reigstad H (1990)
[Clinical manifestations caused by group A streptococci]
Tidsskr Nor Laegeforen, 110 (20), 2629-33
PubMed 2219027

Bucher A, Gaustad P (1990)
Septicemia and endocarditis caused by group G streptococci in a Norwegian hospital
Eur J Clin Microbiol Infect Dis, 9 (4), 251-6
DOI 10.1007/BF01968055, PubMed 2351141

Holte M, Gaustad P, Bevanger L, Andersen K (1990)
[Sore throat. Rapid detection of beta hemolytic group A streptococci by a coagglutination method]
Tidsskr Nor Laegeforen, 110 (1), 50-3
PubMed 2405540

Bucher A, Gaustad P, Pape E (1990)
Chronic neurobrucellosis due to Brucella melitensis
Scand J Infect Dis, 22 (2), 223-6
DOI 10.3109/00365549009037906, PubMed 2356445

Brandtzaeg P, Kierulf P, Gaustad P, Skulberg A, Bruun JN, Halvorsen S, Sørensen E (1989)
Plasma endotoxin as a predictor of multiple organ failure and death in systemic meningococcal disease
J Infect Dis, 159 (2), 195-204
DOI 10.1093/infdis/159.2.195, PubMed 2492587

Malterud K, Gaustad P (1988)
[Cultivation of beta-hemolytic streptococcus from pharyngeal swabs. An evaluation of a method in general practice]
Tidsskr Nor Laegeforen, 108 (22), 1606-8
PubMed 3046046

Brandtzaeg P, Kierulf P, Gaustad P, Dobloug J, Mollnes TE, Sirnes K (1988)
Systemic meningococcal disease: a model infection to study acute endotoxinemia in man
Prog Clin Biol Res, 272, 263-71
PubMed 3393567

Hjortdahl P, Laerum E, Gaustad P (1987)
How reliable and useful is the latex agglutination test in diagnosing streptococcal throat infection in general practice?
Scand J Prim Health Care, 5 (3), 151-4
DOI 10.3109/02813438709013996, PubMed 3313609

Andersen BM, Solberg O, Bryn K, Frøholm LO, Gaustad P, Høiby EA, Kristiansen BE, Bøvre K (1987)
Endotoxin liberation from Neisseria meningitidis isolated from carriers and clinical cases
Scand J Infect Dis, 19 (4), 409-19
DOI 10.3109/00365548709021673, PubMed 3118451

Bakken JS, Bruun JN, Gaustad P, Tasker TC (1986)
Penetration of amoxicillin and potassium clavulanate into the cerebrospinal fluid of patients with inflamed meninges
Antimicrob Agents Chemother, 30 (3), 481-4
DOI 10.1128/AAC.30.3.481, PubMed 3777911

Kristiansen BE, Sørensen B, Bjorvatn B, Falk ES, Fosse E, Bryn K, Frøholm LO, Gaustad P, Bøvre K (1986)
An outbreak of group B meningococcal disease: tracing the causative strain of Neisseria meningitidis by DNA fingerprinting
J Clin Microbiol, 23 (4), 764-7
DOI 10.1128/jcm.23.4.764-767.1986, PubMed 3084555

Caugant DA, Bøvre K, Gaustad P, Bryn K, Holten E, Høiby EA, Frøholm LO (1986)
Multilocus genotypes determined by enzyme electrophoresis of Neisseria meningitidis isolated from patients with systemic disease and from healthy carriers
J Gen Microbiol, 132 (3), 641-52
DOI 10.1099/00221287-132-3-641, PubMed 3016146

KRISTIANSEN BE, SORENSEN B, BJORVATN B, LINDQVIST B, BRYN K, FROHOLM LO, GAUSTAD P, BOVRE K (1986)
DNA FINGERPRINTING OF NEISSERIA-MENINGITIDIS
A VAN LEEUW J MICROB, 52 (3), 200-201
DOI 10.1007/BF00555230

FROHOLM LO, BERDAL BP, BOVRE K, GAUSTAD P, HALSTENSEN AI, HARBOE A, HARTHUG S, HOLTEN E, HOIBY EA, LYSTAD A, OMLAND T, ROSENQVIST E, VIKO G, FRASCH CE, ZOLLINGER WD (1986)
PRELIMINARY-RESULTS FROM A CLINICAL TRAIL WITH A MENINGOCOCCAL VACCINE CONTAINING SEROTYPE-2B AND 15 ANTIGENS IN COMPLEX WITH MIXED A-POLYSACCHARIDE, C-POLYSACCHARIDE, Y-POLYSACCHARIDE AND W135-POLYSACCHARIDE
A VAN LEEUW J MICROB, 52 (3), 239-241
DOI 10.1007/BF00555244

Gaustad P (1985)
Genetic transformation in Streptococcus sanguis. Identification, surface spreading and competence of invasive strains of Streptococcus sanguis Lancefield groups H and W and other invasive viridans streptococci
Acta Pathol Microbiol Immunol Scand B, 93 (4), 277-82
PubMed 3931412

Gaustad P (1985)
Genetic transformation in Streptococcus sanguis. Effects on genetic transformation by culture filtrates of Streptococcus sanguis (serogroups H and W) and streptococcus mitis (mitior) with reference to identification
Acta Pathol Microbiol Immunol Scand B, 93 (4), 283-7
PubMed 4050439

Gaustad P, Frøholm LO (1984)
Genetic transformation in Streptococcus sanguis. Simultaneous variation of surface-spreading, competence, hemagglutination and polar fimbriation in selected strains
Acta Pathol Microbiol Immunol Scand B, 92 (6), 283-9
DOI 10.1111/j.1699-0463.1984.tb02835.x, PubMed 6152366

Holten E, Frøholm LO, Gaustad P (1984)
Virulence markers in patient and carrier strains of Neisseria meningitidis
Scand J Infect Dis, 16 (3), 267-70
DOI 10.3109/00365548409070399, PubMed 6436964

Frøholm LO, Berdal BP, Bøvre K, Gaustad P, Harboe A, Holten E, Høiby EA, Lystad A, Omland T, Frasch CE (1983)
Meningococcal group B vaccine trial in Norway 1981--1982. Preliminary report of results available November 1982
NIPH Ann, 6 (2), 133-8
PubMed 6427703

Gaustad P (1983)
Genetic transformation in Streptococcus sanguis. Kinetics of production in different media and specific interaction of competence factor and competence factor inactivator
Acta Pathol Microbiol Immunol Scand B, 91 (3), 193-200
PubMed 6880744

Bøvre K, Frøholm LO, Gaustad P, Holten E, Høiby EA (1983)
Some agent characteristics and their coexistence related to occurrence and severity of systemic meningococcal disease in Norway, Winter 1981-1982
NIPH Ann, 6 (1), 75-84
PubMed 6413907

GAUSTAD P (1983)
ANAEROBIC INFECTIONS OF THE ORAL CAVITY AND THE EARS, NOSE AND THROAT
Scand. J. Gastroenterol., 18 85, 68-73

Gaustad P, Eriksen J (1981)
Genetic transformation of Streptococcus sanguis. Further studies on the production and isolation of the competence factor
Acta Pathol Microbiol Scand B, 89 (2), 75-80
PubMed 7257777

Gaustad P (1981)
Genetic transformation in Streptococcus sanguis. Competence factor and competence factor inactivator
Acta Pathol Microbiol Scand B, 89 (2), 67-73
DOI 10.1111/j.1699-0463.1981.tb00155_89b.x, PubMed 7257776

Gaustad P (1979)
Distribution of Streptococcus pneumoniae types in Norway
NIPH Ann, 2 (2), 41-4
PubMed 44902

Gaustad P, Eriksen J, Henriksen SD (1979)
Genetic transformation in Streptococcus sanguis. Spontaneous and induced competence of selected strains
Acta Pathol Microbiol Scand B, 87B (2), 117-22
PubMed 375670

Gaustad P (1979)
Genetic transformation in Streptococcus sanguis. Distribution of competence and competence factors in a collection of strains
Acta Pathol Microbiol Scand B, 87B (2), 123-8
PubMed 375671

Førre O, Gaustad P (1977)
An evaluation of two immunological methods in the diagnosis of bacterial meningitis: the effect of ultrasonic treatment of the cerebrospinal fluid
Scand J Infect Dis, 9 (4), 285-8
DOI 10.3109/inf.1977.9.issue-4.05, PubMed 341293

FORRE O, GAUSTAD P (1977)
EVALUATION OF 2 IMMUNOLOGICAL METHODS IN DIAGNOSIS OF BACTERIAL-MENINGITIS - EFFECT OF ULTRASONIC TREATMENT OF CEREBROSPINAL-FLUID
Scand. J. Infect. Dis., 9 (4), 285-288

Førre O, Gaustad P (1976)
[Diagnosis of bacterial meningitis]
Tidsskr Nor Laegeforen, 96 (34-36), 1772-4
PubMed 797047

Review articles

Nordøy I, Gaustad P (2008)
[Drug resistance in the treatment of invasive fungal infections]
Tidsskr Nor Laegeforen, 128 (22), 2607-11
PubMed 19023376

Gaustad P (2001)
[Mechanisms behind the development of antibiotic resistant bacteria]
Tidsskr Nor Laegeforen, 121 (26), 3090-4
PubMed 11757446

Sandven P, Bevanger L, Digranes A, Gaustad P, Haukland HH, Steinbakk M (1998)
Constant low rate of fungemia in norway, 1991 to 1996. The Norwegian Yeast Study Group
J Clin Microbiol, 36 (12), 3455-9
DOI 10.1128/JCM.36.12.3455-3459.1998, PubMed 9817853

Harthug S, Langeland N, Digranes A, Simonsen GS, Olsvik O, Sundsfjord A, Natås OB, Haarr E, Gaustad P, Høiby EA, Svarva PL (1998)
[Infections caused by multiresistant enterococci in Norway]
Tidsskr Nor Laegeforen, 118 (26), 4070-3
PubMed 9844510

Gaustad P (1985)
Genetic transformation in Streptococcus sanguis
J Oslo City Hosp, 35 (7-8), 83-102
PubMed 2864407

Gaustad P (1983)
Anaerobic infections of the oral cavity and the ears, nose and throat
Scand J Gastroenterol Suppl, 85, 68-73
PubMed 6353557