Tuula Pelkonen

Dr. Tuula Pelkonen

Helsinki University Central Hospital

Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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15 April 2009 in Clinical Infectious Diseases
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Journal Article
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TPTuula Pelkonen
Tuula Pelkonen
IRIrmeli Roine
Irmeli Roine
LMLurdes Monteiro
Lurdes Monteiro
MCMargarida Correia
Margarida Correia
APAnne Pitkäranta
Anne Pitkäranta
HPHeikki Peltola
Heikki Peltola
We report a morality rate of 33% among 403 children with bacterial meningitis in Angola. A fatal outcome was associated with impaired consciousness,

1 August 2011 in The Lancet Infectious Diseases
Verified
Journal Article
Closed access
TPTuula Pelkonen
Tuula Pelkonen
IRIrmeli Roine
Irmeli Roine
MCManuel Leite Cruzeiro
Manuel Leite Cruzeiro
APAnne Pitkäranta
Anne Pitkäranta
MKMatti Kataja
Matti Kataja
HPHeikki Peltola
Heikki Peltola

5 January 2022 in GeoHealth
Verified
Journal Article
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JCJosh Colston
Josh Colston
BZBenjamin Zaitchik
Benjamin Zaitchik
HBHamada S. Badr
Hamada S. Badr
EBEleanor Burnett
Eleanor Burnett
SASyed Asad Ali
Syed Asad Ali
MKMargaret Kosek
Margaret Kosek
Diarrheal disease, still a major cause of childhood illness, is caused by numerous, diverse infectious microorganisms, which are differentially sensitive to environmental conditions. Enteropathogen‐specific impacts of climate remain underexplored. Results from 15 studies that diagnosed enteropathogens in 64,788 stool samples from 20,760 children in 19 countries were combined. Infection status for 10 common enteropathogens—adenovirus, astrovirus, norovirus, rotavirus, sapovirus, Campylobacter, ETEC, Shigella, Cryptosporidium and Giardia—was matched by date with hydrometeorological variables from a global Earth observation dataset—precipitation and runoff volume, humidity, soil moisture, solar radiation, air pressure, temperature, and wind speed. Models were fitted for each pathogen, accounting for lags, nonlinearity, confounders, and threshold effects. Different variables showed complex, non‐linear associations with infection risk varying in magnitude and direction depending on pathogen species. Rotavirus infection decreased markedly following increasing 7‐day average temperatures—a relative risk of 0.76 (95% confidence interval: 0.69–0.85) above 28°C—while ETEC risk increased by almost half, 1.43 (1.36–1.50), in the 20–35°C range. Risk for all pathogens was highest following soil moistures in the upper range. Humidity was associated with increases in bacterial infections and decreases in most viral infections. Several virus species' risk increased following lower‐than‐average rainfall, while rotavirus and ETEC increased with heavier runoff. Temperature, soil moisture, and humidity are particularly influential parameters across all enteropathogens, likely impacting pathogen survival outside the host. Precipitation and runoff have divergent associations with different enteric viruses. These effects may engender shifts in the relative burden of diarrhea‐causing agents as the global climate changes.

3 May 2018 in Infectious Diseases of Poverty
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Journal Article
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FUFabian Uddén
Fabian Uddén
MFMatuba Filipe
Matuba Filipe
ÅRÅke Reimer
Åke Reimer
MPMaria Paul
Maria Paul
EMErika Elisabeth Matuschek
Erika Elisabeth Matuschek
KRKristian Riesbeck
Kristian Riesbeck
Chronic suppurative otitis media (CSOM) is an important cause of hearing loss in children and constitutes a serious health problem globally with a strong association to resource-limited living conditions. Topical antibiotics combined with aural toilet is the first-hand treatment for CSOM but antimicrobial resistance and limited availability to antibiotics are obstacles in some areas. The goal of this study was to define aerobic pathogens associated with CSOM in Angola with the overall aim to provide a background for local treatment recommendations. Samples from ear discharge and the nasopharynx were collected and cultured from 152 patients with ear discharge and perforation of the tympanic membrane. Identification of bacterial species was performed with matrix-assisted laser desorption/ionization-time of flight mass spectrometry and pneumococci were serotyped using multiplex polymerase chain reactions. Antimicrobial susceptibility testing was done according to EUCAST. One hundred eighty-four samples from ear discharge and 151 nasopharyngeal swabs were collected and yielded 534 and 289 individual isolates, respectively. In all patients, correspondence rate of isolates from 2 ears in patients with bilateral disease was 27.3% and 9.3% comparing isolates from the nasopharynx and ear discharge, respectively. Proteus spp. (14.7%), Pseudomonas aeruginosa (13.2%) and Enterococcus spp. (8.8%) were dominating pathogens isolated from ear discharge. A large part of the remaining species belonged to Enterobacteriaceae (23.5%). Pneumococci and Staphylococcus aureus were detected in approximately 10% of nasopharyngeal samples. Resistance rates to quinolones exceeded 10% among Enterobacteriaceae and was 30.8% in S. aureus, whereas 6.3% of P. aeruginosa were resistant. The infection of the middle ear in CSOM is highly polymicrobial, and isolates found in nasopharynx do not correspond well with those found in ear discharge. Pathogens associated with CSOM in Angola are dominated by gram-negatives including Enterobacteriaceae and P. aeruginosa, while gram-positive enterococci also are common. Based on the results of antimicrobial susceptibility testing topical quinolones would be the preferred antibiotic therapy of CSOM in Angola. Topical antiseptics such as aluminium acetate, acetic acid or boric acid, however, may be more feasible options due to a possibly emerging antimicrobial resistance.

25 March 2011 in European Archives of Oto-Rhino-Laryngology
Verified
Journal Article
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ATAnni Taipale
Anni Taipale
TPTuula Pelkonen
Tuula Pelkonen
MTMarko Taipale
Marko Taipale
IRIrmeli Roine
Irmeli Roine
LBLuis Bernardino
Luis Bernardino
APAnne Pitkäranta
Anne Pitkäranta

3 November 2021 in Scientific Reports
Verified
Journal Article
Open access
PDF file
HPHeikki Peltola
Heikki Peltola
IRIrmeli Roine
Irmeli Roine
MKMarkku Kallio
Markku Kallio
TPTuula Pelkonen
Tuula Pelkonen
Our objective was to quantify the differences in the outcomes from childhood bacterial meningitis (BM) and to describe the factors associated with them in different parts of the world. This study is a secondary analysis of prospectively collected data from five clinical BM trials conducted in Finland, Latin America (LatAm), and Angola between 1984 and 2017. As all data were collected uniformly, direct comparison of the series was possible. Associations between patient characteristics and death or dismal outcome—the triad of death, severe neurological sequelae, or deafness—were explored. In all, data on 2123 children with BM were analyzed. Etiology was confirmed in 95%, 83%, and 64%, in Finland, LatAm and Angola, respectively. The leading agents were Haemophilus influenzae, Streptococcus pneumoniae, and Neisseria meningitidis. Dismal outcome was the end result for 54%, 31%, and 5% of children in Angola, LatAm, and Finland, respectively. Although underweight, anemia, and tardy arrival worsened prognoses in Angola and LatAm, it was the presenting condition that was central in terms of outcome. In multivariate analysis, the factors independently associated with dismal outcome were the study site (Angola vs. Finland, OR 11.91, 95% CI 5.54–25.63, p < 0.0001 or LatAm vs. Finland, OR 9.46, 95% CI 4.35–20.61, p < 0.0001), Glasgow Coma Score < 13 (OR 4.58, 95% CI 3.31–6.32, p < 0.0001), seizures (OR 1.96, 95% CI 1.43–2.69), age < 1 year (OR 1.55, 95% CI 1.13–2.14, p = 0.007), and pneumococcal etiology (OR 1.49, 95% CI 1.08–2.06, p = 0.015). Greatly dissimilar outcomes from BM reflected the findings on admission on all three continents. Optimizing growth, preventing anemia, and prompt treatment may improve outcomes in resource poor areas.