Journal Article > ResearchFull Text
PLOS One. 2022 June 23; Volume 17 (Issue 6); e0269385.; DOI:10.1371/journal.pone.0269385
Lenglet AD, Contigiani O, Ariti C, Evens E, Charles K, et al.
PLOS One. 2022 June 23; Volume 17 (Issue 6); e0269385.; DOI:10.1371/journal.pone.0269385
In low-resource settings, detection of healthcare-acquired outbreaks in neonatal units relies on astute clinical staff to observe unusual morbidity or mortality from sepsis as microbiological diagnostics are often absent. We aimed to generate reliable (and automated) early warnings for potential clusters of neonatal late onset sepsis using retrospective data that could signal the start of an outbreak in an NCU in Port au Prince, Haiti, using routinely collected data on neonatal admissions. We constructed smoothed time series for late onset sepsis cases, late onset sepsis rates, neonatal care unit (NCU) mortality, maternal admissions, neonatal admissions and neonatal antibiotic consumption. An outbreak was defined as a statistical increase in any of these time series indicators. We created three outbreak alarm classes: 1) thresholds: weeks in which the late onset sepsis cases exceeded four, the late onset sepsis rates exceeded 10% of total NCU admissions and the NCU mortality exceeded 15%; 2) differential: late onset sepsis rates and NCU mortality were double the previous week; and 3) aberration: using the improved Farrington model for late onset sepsis rates and NCU mortality. We validated pairs of alarms by calculating the sensitivity and specificity of the weeks in which each alarm was launched and comparing each alarm to the weeks in which a single GNB positive blood culture was reported from a neonate. The threshold and aberration alarms were the strongest predictors for current and future NCU mortality and current LOS rates (p<0.0002). The aberration alarms were also those with the highest sensitivity, specificity, negative predictive value, and positive predictive value. Without microbiological diagnostics in NCUs in low-resource settings, applying these simple algorithms to routinely collected data show great potential to facilitate early warning for possible healthcare-acquired outbreaks of LOS in neonates. The methods used in this study require validation across other low-resource settings.
Journal Article > ResearchFull Text
Antibiotics. 2021 June 18; Volume 10 (Issue 6); 739.; DOI:10.3390/antibiotics10060739
Rao PS, Moore CC, Mbonde AA, Nuwagira E, Orikiriza P, et al.
Antibiotics. 2021 June 18; Volume 10 (Issue 6); 739.; DOI:10.3390/antibiotics10060739
Critical illness from tuberculosis (TB) bloodstream infection results in a high case fatality rate for people living with human immunodeficiency virus (HIV). Critical illness can lead to altered pharmacokinetics and suboptimal drug exposures. We enrolled adults living with HIV and hospitalized with sepsis, with and without meningitis, in Mbarara, Uganda that were starting first-line anti-TB therapy. Serum was collected two weeks after enrollment at 1-, 2-, 4-, and 6-h post-dose and drug concentrations quantified by validated LC-MS/MS methods. Non-compartmental analyses were used to determine total drug exposure, and population pharmacokinetic modeling and simulations were performed to determine optimal dosages. Eighty-one participants were enrolled. Forty-nine completed pharmacokinetic testing: 18 (22%) died prior to testing, 13 (16%) were lost to follow-up and one had incomplete testing. Isoniazid had the lowest serum attainment, with only 4.1% achieving a target exposure over 24 h (AUC0-24) of 52 mg·h/L despite appropriate weight-based dosing. Simulations to reach target AUC0-24 found necessary doses of rifampin of 1800 mg, pyrazinamide of 2500-3000 mg, and for isoniazid 900 mg or higher. Given the high case fatality ratio of TB-related critical illness in this population, an early higher dose anti-TB therapy should be trialed.
Journal Article > Case Report/SeriesFull Text
Oxf Med Case Reports. 2023 July 18; Volume 2023 (Issue 7); omad071.; DOI:10.1093/omcr/omad071
Olubiyo R, Chukwumeze F, Lawal AM, Oloruntuyi G, Musoka H, et al.
Oxf Med Case Reports. 2023 July 18; Volume 2023 (Issue 7); omad071.; DOI:10.1093/omcr/omad071
Yeast-related bloodstream infections (BSIs) in pediatric patients are associated with severe acute malnutrition (SAM), hematological/oncological malignancies and admission to an intensive care unit. These infections are rarely described from low- and middle-income countries. We describe a case series of pediatric patients diagnosed with severe sepsis and yeast isolated from their blood culture in a conflict-affected area of Nigeria from October 2018 to November 2021. We identified 20 patients with yeast BSIs, among whom 17 were also diagnosed with SAM. We recommend the inclusion of antifungal treatment for empiric treatment guidelines for children with SAM and severe sepsis in similar settings.
Journal Article > ResearchFull Text
Diagnostics (Basel). 2023 January 31; Volume 13 (Issue 3); 523.; DOI:10.3390/diagnostics13030523
Natale A, Oueslati S, Rochard A, Lopez-Baez D, Ombelet S, et al.
Diagnostics (Basel). 2023 January 31; Volume 13 (Issue 3); 523.; DOI:10.3390/diagnostics13030523
Culture media is fundamental in clinical bacteriology for the detection and isolation of bacterial pathogens. However, in-house media preparation could be challenging in low-resource settings. InTray® cassettes (Biomed Diagnostics) could be a valid alternative as they are compact, ready-to-use media preparations. In this study, we evaluate the use of two InTray media as a subculture alternative for the diagnosis of bloodstream infections: the InTray® Müller-Hinton (MH) chocolate and the InTray® Colorex™ Screen. The InTray MH chocolate was evaluated in 2 steps: firstly, using simulated positive blood cultures (reference evaluation study), and secondly, using positive blood cultures from a routine clinical laboratory (clinical evaluation study). The Colorex Screen was tested using simulated poly-microbial blood cultures. The sensitivity and specificity of the InTray MH chocolate were respectively 99.2% and 90% in the reference evaluation study and 97.1% and 88.2% in the clinical evaluation study. The time to detection (TTD) was ≤20 h in most positive blood cultures (99.8% and 97% in the two studies, respectively). The InTray® MH Chocolate agar showed good performance when used directly from clinical blood cultures for single bacterial infections. However, mixed flora is more challenging to interpret on this media than on Colorex™ Screen, even for an experienced microbiologist.
Journal Article > CommentaryFull Text
BMJ Glob Health. 2024 September 10; Volume 9 (Issue 9); e015862.; DOI:10.1136/bmjgh-2024-015862
Gleeson B, Ferreyra C, Palamountain K, Jacob ST, Spotswood N, et al.
BMJ Glob Health. 2024 September 10; Volume 9 (Issue 9); e015862.; DOI:10.1136/bmjgh-2024-015862
Conference Material > Poster
Goodyer J, Elbadawi H, Mayronne S, Lynch E, Michel J, et al.
MSF Paediatric Days 2022. 2022 November 30; DOI:10.57740/2cfg-vx89
Journal Article > ResearchFull Text
J Glob Antimicrob Resist. 2020 December 1; Volume 23; 102-107.; DOI:10.1016/j.jgar.2020.08.017
Lenglet AD, Schuurmans J, Ariti C, Borgundvaag E, Charles K, et al.
J Glob Antimicrob Resist. 2020 December 1; Volume 23; 102-107.; DOI:10.1016/j.jgar.2020.08.017
OBJECTIVES
We analysed the concordance of rectal swab isolates and blood culture for Gram-negative bacteria (GNB) isolates in neonates with a suspicion of neonatal sepsis admitted to a neonatal care unit in Haiti.
METHODS
We matched pairs of blood and rectal samples taken on the date of suspected sepsis onset in the same neonate. We calculated the proportion of rectal isolates in concordance with the blood isolates by species and genus. We calculated the negative predictive value (NPV) for GNB and extended-spectrum β-lactamase (ESBL)-producing GNB for all rectal and blood isolate pairs in neonates with suspected sepsis.
RESULTS
We identified 238 blood and rectal samples pairs, with 238 blood isolate results and 309 rectal isolate results. The overall concordance in genus and species between blood and rectal isolates was 22.3% [95% confidence interval (CI) 17.4-28.0%] and 20.6% (95% CI 16.0-26.2%), respectively. The highest concordance between blood and rectal isolates was observed for samples with no bacterial growth (65%), followed byKlebsiella pneumoniae (18%) and Klebsiella oxytoca (12%). The NPV of detecting GNB bacterial isolates in rectal samples compared with those in blood samples was 81.6% and the NPV for ESBL-positive GNB was 92.6%.
CONCLUSIONS
The NPV of rectal swab GNB isolates was high in all patient groups and was even higher for ESBL-positive GNB. Clinicians can use the results from rectal swabs when taken simultaneously with blood samples during outbreaks to inform the (de-)escalation of antibiotic therapy in those neonates that have an ongoing sepsis profile.
We analysed the concordance of rectal swab isolates and blood culture for Gram-negative bacteria (GNB) isolates in neonates with a suspicion of neonatal sepsis admitted to a neonatal care unit in Haiti.
METHODS
We matched pairs of blood and rectal samples taken on the date of suspected sepsis onset in the same neonate. We calculated the proportion of rectal isolates in concordance with the blood isolates by species and genus. We calculated the negative predictive value (NPV) for GNB and extended-spectrum β-lactamase (ESBL)-producing GNB for all rectal and blood isolate pairs in neonates with suspected sepsis.
RESULTS
We identified 238 blood and rectal samples pairs, with 238 blood isolate results and 309 rectal isolate results. The overall concordance in genus and species between blood and rectal isolates was 22.3% [95% confidence interval (CI) 17.4-28.0%] and 20.6% (95% CI 16.0-26.2%), respectively. The highest concordance between blood and rectal isolates was observed for samples with no bacterial growth (65%), followed byKlebsiella pneumoniae (18%) and Klebsiella oxytoca (12%). The NPV of detecting GNB bacterial isolates in rectal samples compared with those in blood samples was 81.6% and the NPV for ESBL-positive GNB was 92.6%.
CONCLUSIONS
The NPV of rectal swab GNB isolates was high in all patient groups and was even higher for ESBL-positive GNB. Clinicians can use the results from rectal swabs when taken simultaneously with blood samples during outbreaks to inform the (de-)escalation of antibiotic therapy in those neonates that have an ongoing sepsis profile.
Conference Material > Poster
Philip RR, Chukwumeze F, Lawal AM, Oloruntuyi G, Musoka H, et al.
MSF Paediatric Days 2022. 2022 November 30; DOI:10.57740/s90v-q391
Journal Article > EditorialFull Text
Pediatr Crit Care Med
. 2022 July 1; Volume 23 (Issue 7); 560-562.; DOI:10.1097/PCC.0000000000002984
Conlon TW, Himebauch AS, Stratta EM, Srinivasan V
Pediatr Crit Care Med
. 2022 July 1; Volume 23 (Issue 7); 560-562.; DOI:10.1097/PCC.0000000000002984
Journal Article > ResearchFull Text
PLoS Curr. 2018 March 21; Volume 10; ecurrents.outbreaks.58723332ec0de952adefd9a9b6905932.
Lenglet AD, Faniyan O, Hopman J
PLoS Curr. 2018 March 21; Volume 10; ecurrents.outbreaks.58723332ec0de952adefd9a9b6905932.
INTRODUCTION
Between July 2014 and September 2015, a neonatal care unit (NCU) in Port Au Prince, Haiti, experienced an outbreak of sepsis, most probably due to nosocomial transmission of Extended Beta Lactamase (ESBL) producing gram negative bacteria, included Klebsiella pneumoniae.
METHODS
We describe the epidemiological and microbiological activities performed as part of the outbreak investigation and the control measures implemented throughout this period.
RESULTS
During the study period 257 cases of sepsis were reported, of which 191 died. The case fatality decreased from 100% in July 2014 to 24% in September 2015 and could be attributed to an improvement in clinical management and strengthened infection prevention and control measures. Risk factors identified to be associated with having late onset sepsis (sepsis onset >48 hours after birth)(n=205/257, 79. included: all categories of birthweight lower than <2500g (p=<0.0001) and all categories of gestational age younger than 36 weeks (p=0.0002). Microbiological investigations confirmed that out of 32 isolates (N=55; 58%) that were positive for gram negative bacteria, 27 (89%) were due to K. pneumoniae and most of these were from single MLST type (ST37).
DISCUSSION
This outbreak highlighted the importance of epidemiological and microbiological surveillance during an outbreak of sepsis in a NCU in a low resource setting, including regular point prevalence surveys.
Between July 2014 and September 2015, a neonatal care unit (NCU) in Port Au Prince, Haiti, experienced an outbreak of sepsis, most probably due to nosocomial transmission of Extended Beta Lactamase (ESBL) producing gram negative bacteria, included Klebsiella pneumoniae.
METHODS
We describe the epidemiological and microbiological activities performed as part of the outbreak investigation and the control measures implemented throughout this period.
RESULTS
During the study period 257 cases of sepsis were reported, of which 191 died. The case fatality decreased from 100% in July 2014 to 24% in September 2015 and could be attributed to an improvement in clinical management and strengthened infection prevention and control measures. Risk factors identified to be associated with having late onset sepsis (sepsis onset >48 hours after birth)(n=205/257, 79. included: all categories of birthweight lower than <2500g (p=<0.0001) and all categories of gestational age younger than 36 weeks (p=0.0002). Microbiological investigations confirmed that out of 32 isolates (N=55; 58%) that were positive for gram negative bacteria, 27 (89%) were due to K. pneumoniae and most of these were from single MLST type (ST37).
DISCUSSION
This outbreak highlighted the importance of epidemiological and microbiological surveillance during an outbreak of sepsis in a NCU in a low resource setting, including regular point prevalence surveys.