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De Wals P. New-generation pneumococcal vaccines for children. Lancet Public Health 2024:S2468-2667(24)00189-0. [PMID: 39153493 DOI: 10.1016/s2468-2667(24)00189-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Accepted: 08/05/2024] [Indexed: 08/19/2024]
Affiliation(s)
- Philippe De Wals
- Department of Social and Preventive Medicine, Laval University, Quebec City, QC G1V 0A6, Canada; Québec University Hospital Center-Laval University, Quebec City, QC, Canada; Quebec National Public Health Institute, Quebec City, QC, Canada.
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2
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Andrejko KL, Gierke R, Rowlands JV, Rosen JB, Thomas A, Landis ZQ, Rosales M, Petit S, Schaffner W, Holtzman C, Barnes M, Farley MM, Harrison LH, McGee L, Chochua S, Verani JR, Cohen AL, Pilishvili T, Kobayashi M. Effectiveness of 13-valent pneumococcal conjugate vaccine for prevention of invasive pneumococcal disease among children in the United States between 2010 and 2019: An indirect cohort study. Vaccine 2024; 42:3555-3563. [PMID: 38704263 DOI: 10.1016/j.vaccine.2024.04.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/09/2024] [Accepted: 04/21/2024] [Indexed: 05/06/2024]
Abstract
BACKGROUND A U.S. case-control study (2010-2014) demonstrated vaccine effectiveness (VE) for ≥ 1 dose of the thirteen-valent pneumococcal conjugate vaccine (PCV13) against vaccine-type (VT) invasive pneumococcal disease (IPD) at 86 %; however, it lacked statistical power to examine VE by number of doses and against individual serotypes. METHODS We used the indirect cohort method to estimate PCV13 VE against VT-IPD among children aged < 5 years in the United States from May 1, 2010 through December 31, 2019 using cases from CDC's Active Bacterial Core surveillance, including cases enrolled in a matched case-control study (2010-2014). Cases and controls were defined as individuals with VT-IPD and non-PCV13-type-IPD (NVT-IPD), respectively. We estimated absolute VE using the adjusted odds ratio of prior PCV13 receipt (1-aOR x 100 %). RESULTS Among 1,161 IPD cases, 223 (19.2 %) were VT cases and 938 (80.8 %) were NVT controls. Of those, 108 cases (48.4 %; 108/223) and 600 controls (64.0 %; 600/938) had received > 3 PCV13 doses; 23 cases (17.6 %) and 15 controls (2.4 %) had received no PCV doses. VE ≥ 3 PCV13 doses against VT-IPD was 90.2 % (95 % Confidence Interval75.4-96.1 %), respectively. Among the most commonly circulating VT-IPD serotypes, VE of ≥ 3 PCV13 doses was 86.8 % (73.7-93.3 %), 50.2 % (28.4-80.5 %), and 93.8 % (69.8-98.8 %) against serotypes 19A, 3, and 19F, respectively. CONCLUSIONS At least three doses of PCV13 continue to be effective in preventing VT-IPD among children aged < 5 years in the US. PCV13 was protective against serotypes 19A and 19F IPD; protection against serotype 3 IPD did not reach statistical significance.
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Affiliation(s)
- Kristin L Andrejko
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA.
| | - Ryan Gierke
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Jennifer B Rosen
- Bureau of Immunization, New York City Department of Health and Mental Hygiene, New York, NY, USA
| | - Ann Thomas
- Oregon Public Health Division, Portland, OR, USA
| | | | - Maria Rosales
- California Emerging Infections Program, Richmond, CA, USA
| | - Sue Petit
- Connecticut Department of Public Health, Hartford, CT, USA
| | - William Schaffner
- Department of Health Policy, Vanderbilt University School of Medicine, Nashville, TN, USA
| | | | - Meghan Barnes
- Colorado Department of Public Health and Environment, Denver, CO, USA
| | - Monica M Farley
- Department of Medicine, Emory University School of Medicine and Atlanta VA Medical Center, Atlanta, GA, USA
| | - Lee H Harrison
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - Lesley McGee
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Sopio Chochua
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Jennifer R Verani
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Adam L Cohen
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Tamara Pilishvili
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Miwako Kobayashi
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
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3
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Chan JM, Ramos-Sevillano E, Betts M, Wilson HU, Weight CM, Houhou-Ousalah A, Pollara G, Brown JS, Heyderman RS. Bacterial surface lipoproteins mediate epithelial microinvasion by Streptococcus pneumoniae. Infect Immun 2024; 92:e0044723. [PMID: 38629841 DOI: 10.1128/iai.00447-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 03/27/2024] [Indexed: 05/08/2024] Open
Abstract
Streptococcus pneumoniae, a common colonizer of the upper respiratory tract, invades nasopharyngeal epithelial cells without causing disease in healthy participants of controlled human infection studies. We hypothesized that surface expression of pneumococcal lipoproteins, recognized by the innate immune receptor TLR2, mediates epithelial microinvasion. Mutation of lgt in serotype 4 (TIGR4) and serotype 6B (BHN418) pneumococcal strains abolishes the ability of the mutants to activate TLR2 signaling. Loss of lgt also led to the concomitant decrease in interferon signaling triggered by the bacterium. However, only BHN418 lgt::cm but not TIGR4 lgt::cm was significantly attenuated in epithelial adherence and microinvasion compared to their respective wild-type strains. To test the hypothesis that differential lipoprotein repertoires in TIGR4 and BHN418 lead to the intraspecies variation in epithelial microinvasion, we employed a motif-based genome analysis and identified an additional 525 a.a. lipoprotein (pneumococcal accessory lipoprotein A; palA) encoded by BHN418 that is absent in TIGR4. The gene encoding palA sits within a putative genetic island present in ~10% of global pneumococcal isolates. While palA was enriched in the carriage and otitis media pneumococcal strains, neither mutation nor overexpression of the gene encoding this lipoprotein significantly changed microinvasion patterns. In conclusion, mutation of lgt attenuates epithelial inflammatory responses during pneumococcal-epithelial interactions, with intraspecies variation in the effect on microinvasion. Differential lipoprotein repertoires encoded by the different strains do not explain these differences in microinvasion. Rather, we postulate that post-translational modifications of lipoproteins may account for the differences in microinvasion.IMPORTANCEStreptococcus pneumoniae (pneumococcus) is an important mucosal pathogen, estimated to cause over 500,000 deaths annually. Nasopharyngeal colonization is considered a necessary prerequisite for disease, yet many people are transiently and asymptomatically colonized by pneumococci without becoming unwell. It is therefore important to better understand how the colonization process is controlled at the epithelial surface. Controlled human infection studies revealed the presence of pneumococci within the epithelium of healthy volunteers (microinvasion). In this study, we focused on the regulation of epithelial microinvasion by pneumococcal lipoproteins. We found that pneumococcal lipoproteins induce epithelial inflammation but that differing lipoprotein repertoires do not significantly impact the magnitude of microinvasion. Targeting mucosal innate immunity and epithelial microinvasion alongside the induction of an adaptive immune response may be effective in preventing pneumococcal colonization and disease.
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Affiliation(s)
- Jia Mun Chan
- Research Department of Infection, Division of Infection and Immunity, University College London, London, United Kingdom
| | - Elisa Ramos-Sevillano
- UCL Respiratory, Division of Medicine, University College London, London, United Kingdom
| | - Modupeh Betts
- Research Department of Infection, Division of Infection and Immunity, University College London, London, United Kingdom
| | - Holly U Wilson
- Research Department of Infection, Division of Infection and Immunity, University College London, London, United Kingdom
| | - Caroline M Weight
- Research Department of Infection, Division of Infection and Immunity, University College London, London, United Kingdom
| | - Ambrine Houhou-Ousalah
- Research Department of Infection, Division of Infection and Immunity, University College London, London, United Kingdom
| | - Gabriele Pollara
- Research Department of Infection, Division of Infection and Immunity, University College London, London, United Kingdom
| | - Jeremy S Brown
- UCL Respiratory, Division of Medicine, University College London, London, United Kingdom
| | - Robert S Heyderman
- Research Department of Infection, Division of Infection and Immunity, University College London, London, United Kingdom
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4
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Emgård M, Andersson M, Gonzales-Siles L, Msuya SE, Nyombi BM, Nordén R, Muro F, Lindh M, Andersson R, Skovbjerg S. Co-occurrence of bacteria and viruses and serotype distribution of Streptococcus pneumoniae in the nasopharynx of Tanzanian children below 2 years of age following introduction of the PCV13. Front Public Health 2024; 12:1298222. [PMID: 38317802 PMCID: PMC10839969 DOI: 10.3389/fpubh.2024.1298222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 01/04/2024] [Indexed: 02/07/2024] Open
Abstract
Introduction Pneumococcal conjugate vaccines have reduced severe disease attributed to vaccine-type pneumococci in children. However, the effect is dependent on serotype distribution in the population and disease development may be influenced by co-occurrence of viral and bacterial pathogens in the nasopharynx. Methods Following introduction of the 13-valent pneumococcal conjugate vaccine (PCV13) in Tanzania we performed repeated cross-sectional surveys, including 775 children below 2 years of age attending primary healthcare centers. All children were sampled from nasopharynx and pneumococci were detected by single-target PCR. Pneumococcal serotypes/groups and presence of viruses and other bacteria were determined by two multiplex PCR assays. Results The prevalence of PCV13 vaccine-type pneumococci decreased by 50%, but residual vaccine-types were still detected in 21% of the children 2 years after PCV13 introduction. An increase in the non-vaccine-type 15 BC was observed. Pneumococci were often co-occurring with Haemophilus influenzae, and detection of rhino/enterovirus was associated with higher pneumococcal load. Discussion We conclude that presence of residual vaccine-type and emerging non-vaccine-type pneumococci in Tanzanian children demand continued pneumococcal surveillance. High co-occurrence of viral and bacterial pathogens may contribute to the disease burden and indicate the need of multiple public health interventions to improve child health in Tanzania.
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Affiliation(s)
- Matilda Emgård
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Center for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
- Department of Pediatrics, Queen Silvia Children’s Hospital, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Maria Andersson
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Microbiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Lucia Gonzales-Siles
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Sia E. Msuya
- Institute of Public Health, Kilimanjaro Christian Medical University College (KCMUCo), Moshi, Tanzania
| | - Balthazar M. Nyombi
- Institute of Public Health, Kilimanjaro Christian Medical University College (KCMUCo), Moshi, Tanzania
| | - Rickard Nordén
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Microbiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Florida Muro
- Institute of Public Health, Kilimanjaro Christian Medical University College (KCMUCo), Moshi, Tanzania
- Department of Community Medicine, Kilimanjaro Christian Medical Center (KCMC), Moshi, Tanzania
| | - Magnus Lindh
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Microbiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Rune Andersson
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Center for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Microbiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Susann Skovbjerg
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Center for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Microbiology, Sahlgrenska University Hospital, Gothenburg, Sweden
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5
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Dawood HN, Al-Jumaili AH, Radhi AH, Ikram D, Al-Jabban A. Emerging pneumococcal serotypes in Iraq: scope for improved vaccine development. F1000Res 2023; 12:435. [PMID: 38283903 PMCID: PMC10811421 DOI: 10.12688/f1000research.132781.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/26/2024] [Indexed: 01/30/2024] Open
Abstract
Pneumococcal disease is a global public health concern as it affects the young, aged and the immunocompromised. The development of pneumococcal vaccines and their incorporation in the immunization programs has helped to reduce the global burden of disease. However, serotype replacement and the emergence of non-vaccine serotypes as well as the persistence of a few vaccine serotypes underscores the need for development of new and effective vaccines against such pneumococcal serotypes. In the Middle East, places of religious mass gatherings are a hotspot for disease transmission in addition to the global risk factors. Therefore, the periodic surveillance of pneumococcal serotypes circulating in the region to determine the effectiveness of existing prevention strategies and develop improved vaccines is warranted. Currently, there is a lack of serotype prevalence data for Iraq due to inadequate surveillance in the region. Thus, this review aims to determine the pneumococcal serotypes circulating in Iraq which may help in the development and introduction of improved pneumococcal vaccines in the country.
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Affiliation(s)
| | | | - Ahmed H. Radhi
- F.i.c.m.s/ C.M, Center for disease control and prevention, Baghdad, Iraq
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6
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Metcalf BJ, Waldetoft KW, Beall BW, Brown SP. Variation in pneumococcal invasiveness metrics is driven by serotype carriage duration and initial risk of disease. Epidemics 2023; 45:100731. [PMID: 38039595 PMCID: PMC10786323 DOI: 10.1016/j.epidem.2023.100731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/24/2023] [Accepted: 11/20/2023] [Indexed: 12/03/2023] Open
Abstract
Streptococcus pneumoniae is an opportunistic pathogen that, while usually carried asymptomatically, can cause severe invasive diseases like meningitis and bacteremic pneumonia. A central goal in S. pneumoniae public health management is to identify which serotypes (immunologically distinct strains) pose the most risk of invasive disease. The most common invasiveness metrics use cross-sectional data (i.e., invasive odds ratios (IOR)), or longitudinal data (i.e., attack rates (AR)). To assess the reliability of these metrics we developed an epidemiological model of carriage and invasive disease. Our mathematical analyses illustrate qualitative failures with the IOR metric (e.g., IOR can decline with increasing invasiveness parameters). Fitting the model to both longitudinal and cross-sectional data, our analysis supports previous work indicating that invasion risk is maximal at or near time of colonization. This pattern of early invasive disease risk leads to substantial (up to 5-fold) biases when estimating underlying differences in invasiveness from IOR metrics, due to the impact of carriage duration on IOR. Together, these results raise serious concerns with the IOR metric as a basis for public health decision-making and lend support for multiple alternate metrics including AR.
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Affiliation(s)
- Benjamin J Metcalf
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia; Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, Georgia; Centers for Disease Control and Prevention, Atlanta, Georgia.
| | - Kristofer Wollein Waldetoft
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia; Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, Georgia; Torsby Hospital, Torsby, Sweden
| | - Bernard W Beall
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Sam P Brown
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia; Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, Georgia.
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7
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Verma N, Gupta P, Pandey AK, Awasthi S. Nasopharyngeal carriage of Streptococcus pneumoniae serotypes among sick and healthy children in northern India: A case-control study. Vaccine 2023; 41:6619-6624. [PMID: 37758571 PMCID: PMC10663590 DOI: 10.1016/j.vaccine.2023.09.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 08/29/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND Streptococcus pneumoniae is leading bacterial cause of community acquired pneumonia and according to World Health Organization, responsible for 14 % death in children. There is effective vaccine available against Streptococcus pneumoniae. Hence the primary objective was to isolate Streptococcus pneumoniae from nasopharyngeal swabs in children aged 2-59 months with and without community acquired pneumonia and to assess their serotypes. METHODS This case-control study was conducted in tertiary teaching institutes in northern India. Hospitalized children, aged 2-59 months, with World Health Organization-defined community acquired pneumonia were included as cases. Age matched healthy controls were recruited from immunization clinic. All enrolments were done after written informed parental consent. Nasopharyngeal swabs were taken from both cases and controls, and were cultured on 5 % sheep blood agar with gentamycin plate for growth of Streptococcus pneumoniae and incubated in a jar at 370 for 18-24 hrs. Quellung reaction test was used for serotyping. RESULTS From March 2017 to December 2022, 2693 children (1910 cases and 783 controls), were recruited. The median age of cases was 7 months and controls 10 months. Almost all the cases had received antibiotics prior to hospitalization. Streptococcus pneumoniae positivity in nasopharyngeal swab was 8.1 % in cases, of which 56.8 % were vaccine serotypes and 23.6 % in controls, of which 37.8 % were vaccine serotypes. Adjusted odds ratio of isolating vaccine serotypes among cases as compared to controls was 1.77 (95 % CI, 1.09-2.88). CONCLUSION Streptococcus pneumoniae isolation from nasopharyngeal was found to be in lower proportion in cases as compared to control, though colonization with vaccine serotypes was higher in cases as compared to control. Therefore, pneumococcal vaccine coverage must be increased to prevent community acquired pneumonia.
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Affiliation(s)
- N Verma
- Department of Pediatrics, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - P Gupta
- Department of Microbiology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - A K Pandey
- Department of Pediatrics, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - S Awasthi
- Department of Pediatrics, King George's Medical University, Lucknow, Uttar Pradesh, India.
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8
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Butler MEB, Jansen van Rensburg MJ, Karani A, Mvera B, Akech D, Akter A, Forrest C, van Tonder AJ, Quirk SJ, Haraldsson G, Bentley SD, Erlendsdóttir H, Haraldsson Á, Kristinsson KG, Scott JAG, Brueggemann AB. Nasopharyngeal competition dynamics are likely to be altered following vaccine introduction: bacteriocin prevalence and diversity among Icelandic and Kenyan pneumococci. Microb Genom 2023; 9:mgen001060. [PMID: 37436819 PMCID: PMC10438807 DOI: 10.1099/mgen.0.001060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 06/09/2023] [Indexed: 07/13/2023] Open
Abstract
Bacteriocins are antimicrobial peptides produced by bacteria to inhibit other bacteria in the surrounding environment. Streptococcus pneumoniae is a leading cause of disease worldwide and colonises the healthy human nasopharynx, where it competes for space and nutrients. Pneumococcal conjugate vaccines have reduced the incidence of disease, but they also restructure the bacterial population, and this restructuring likely alters the nasopharyngeal competition dynamics. Here, the distribution of bacteriocins was examined in over 5000 carriage and disease-causing pneumococci from Iceland and Kenya, recovered before and after the introduction of pneumococcal vaccination. Overall, up to eleven different bacteriocin gene clusters were identified per pneumococcus. Significant differences in the prevalence of bacteriocins were observed before and after vaccine introduction, and among carriage and disease-causing pneumococci, which were largely explained by the bacterial population structure. Genetically similar pneumococci generally harboured the same bacteriocins although sometimes different repertoires of bacteriocins were observed, which suggested that horizontal transfer of bacteriocin clusters had occurred. These findings demonstrated that vaccine-mediated changes in the pneumococcal population altered the prevalence and distribution of bacteriocins. The consequences of this for pneumococcal colonisation and disease remain to be determined.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Sigríður J. Quirk
- University of Iceland and Landspitali - The National University Hospital of Iceland, Reykjavík, Iceland
| | - Gunnsteinn Haraldsson
- University of Iceland and Landspitali - The National University Hospital of Iceland, Reykjavík, Iceland
| | | | - Helga Erlendsdóttir
- University of Iceland and Landspitali - The National University Hospital of Iceland, Reykjavík, Iceland
| | - Ásgeir Haraldsson
- University of Iceland and Children’s Hospital Iceland, Landspitali, Reykjavík, Iceland
| | - Karl G. Kristinsson
- University of Iceland and Landspitali - The National University Hospital of Iceland, Reykjavík, Iceland
| | - J. Anthony G. Scott
- KEMRI Wellcome Trust Programme, Kilifi, Kenya
- London School of Hygiene and Tropical Medicine, London, UK
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Naturally-occurring serotype 3 Streptococcus pneumoniae strains that lack functional pneumolysin and autolysin have attenuated virulence but induce localized protective immune responses. PLoS One 2023; 18:e0282843. [PMID: 36897919 PMCID: PMC10004606 DOI: 10.1371/journal.pone.0282843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 02/23/2023] [Indexed: 03/11/2023] Open
Abstract
Streptococcus pneumoniae is an important cause of fatal pneumonia in humans. These bacteria express virulence factors, such as the toxins pneumolysin and autolysin, that drive host inflammatory responses. In this study we confirm loss of pneumolysin and autolysin function in a group of clonal pneumococci that have a chromosomal deletion resulting in a pneumolysin-autolysin fusion gene Δ(lytA'-ply')593. The Δ(lytA'-ply')593 pneumococci strains naturally occur in horses and infection is associated with mild clinical signs. Here we use immortalized and primary macrophage in vitro models, which include pattern recognition receptor knock-out cells, and a murine acute pneumonia model to show that a Δ(lytA'-ply')593 strain induces cytokine production by cultured macrophages, however, unlike the serotype-matched ply+lytA+ strain, it induces less tumour necrosis factor α (TNFα) and no interleukin-1β production. The TNFα induced by the Δ(lytA'-ply')593 strain requires MyD88 but, in contrast to the ply+lytA+ strain, is not reduced in cells lacking TLR2, 4 or 9. In comparison to the ply+lytA+ strain in a mouse model of acute pneumonia, infection with the Δ(lytA'-ply')593 strain resulted in less severe lung pathology, comparable levels of interleukin-1α, but minimal release of other pro-inflammatory cytokines, including interferon-γ, interleukin-6 and TNFα. These results suggest a mechanism by which a naturally occurring Δ(lytA'-ply')593 mutant strain of S. pneumoniae that resides in a non-human host has reduced inflammatory and invasive capacity compared to a human S. pneumoniae strain. These data probably explain the relatively mild clinical disease in response to S. pneumoniae infection seen in horses in comparison to humans.
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10
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Bautista L, Pill-Pepe L, Kapoor N, Snyder S, Chu E, Agarwal P, Sardar M, Arulkumar S, Berges A, Iverson M, Behrens C, Marcq O, Fairman J. Addition of Lauryldimethylamine N-Oxide (LDAO) to a Copper-Free Click Chemistry Reaction Improves the Conjugation Efficiency of a Cell-Free Generated CRM197 Variant to Clinically Important Streptococcus pneumoniae Serotypes. ACS OMEGA 2022; 7:34921-34928. [PMID: 36211053 PMCID: PMC9535640 DOI: 10.1021/acsomega.2c03481] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/07/2022] [Indexed: 05/22/2023]
Abstract
Strain-promoted azide-alkyne cycloaddition (SPAAC) reactions like click chemistry have the potential to be highly scalable, robust, and cost-effective methods for generating small- and large-molecule conjugates for a variety of applications. However, despite method improvements, the rates of copper-based click chemistry reactions continue to be much faster than the rates of copper-free click chemistry reactions, which makes broader deployment of click chemistry challenging from a safety and compatibility standpoint. In this study, we used a zwitterionic detergent, namely, lauryldimethylamine N-oxide (LDAO), in a copper-free click chemistry reaction to investigate its impact on the generation of conjugate vaccines (CVs). For this, we utilized an Xpress cell-free protein synthesis (CFPS) platform to generate a proprietary variant of CRM197 (eCRM) containing non-native amino acids (nnAA) with azide-containing side chains as a carrier protein for conjugation to several clinically relevant dibenzocyclooctyne (DBCO)-derivatized S. pneumoniae serotypes (types 3, 5, 18C, and 19A). For conjugation, we performed copper-free click chemistry in the presence and absence of LDAO. Our results show that the addition of LDAO significantly enhanced the reaction kinetics to generate larger conjugates, which were similarly immunogenic and equally stable to conjugates generated without LDAO. Most importantly, the addition of LDAO substantially improved the efficiency of the conjugation process. Thus, our results for the first time show that the addition of a zwitterionic surfactant to a copper-free click chemistry reaction can significantly accelerate the reaction kinetics along with improving the efficiency of the conjugation process.
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11
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Perniciaro S, van der Linden M, Weinberger DM. Reemergence of Invasive Pneumococcal Disease in Germany During the Spring and Summer of 2021. Clin Infect Dis 2022; 75:1149-1153. [PMID: 35136983 PMCID: PMC9383454 DOI: 10.1093/cid/ciac100] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND The incidence of invasive pneumococcal disease (IPD) decreased worldwide in 2020 and the first quarter of 2021, concurrent with nonpharmaceutical interventions (NPIs) intended to stymie transmission of SARS-CoV-2. In 2021, the stringency of these NPI strategies has varied. We investigated age- and serotype-specific variations in IPD case counts in Germany in 2020-2021. METHODS IPD cases through 30 November 2021 were stratified by age group, serotype, or geographic location. IPD surveillance data in 2020-2021 were compared with (1) IPD surveillance data from 2015-2019, (2) mobility data during 2020 and 2021, and (3) NPI stringency data in 2020 and 2021. RESULTS IPD incidence began to return toward baseline among children 0-4 years old in April 2021 and exceeded baseline by June 2021 (a 9% increase over the average monthly values for 2015-2019). Children aged 5-14 years and adults aged 15-34 or ≥80 years showed increases in IPD cases that exceeded baseline values starting in July 2021, with increases also starting in spring 2021. The age distribution and proportion of vaccine-serotype IPD remained comparable to those in previous years, despite lower overall case counts in 2020 and 2021. The percentage change in IPD incidence compared with the previous 5 years was correlated with changes in mobility and with NPI stringency. CONCLUSIONS IPD levels began to return to and exceed seasonal levels in spring and summer 2021 in Germany, following sharp declines in 2020 that coincided with NPIs related to the coronavirus disease 2019 pandemic. Proportions of vaccine serotypes remained largely consistent throughout 2020-2021.
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Affiliation(s)
- Stephanie Perniciaro
- Correspondence: S. Perniciaro, Yale University School of Public Health, 350 George St, Public Health Modeling Unit, New Haven, CT 06511 ()
| | - Mark van der Linden
- German National Reference Center for Streptococci, Department of Medical Microbiology, University Hospital RWTH Aachen, Aachen, Germany
| | - Daniel M Weinberger
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
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12
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Mutagonda RF, Bwire G, Sangeda RZ, Kilonzi M, Mlyuka H, Ndunguru J, Jonathan A, Makani J, Minja IK, Ruggajo P, Balandya E, Kamuhabwa AAR. Nasopharyngeal Carriage and Antibiogram of Pneumococcal and Other Bacterial Pathogens from Children with Sickle Cell Disease in Tanzania. Infect Drug Resist 2022; 15:4407-4418. [PMID: 35992757 PMCID: PMC9390788 DOI: 10.2147/idr.s367873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/03/2022] [Indexed: 01/30/2023] Open
Abstract
Background Bacterial infections contribute significantly to morbidity and mortality in sickle cell disease (SCD) patients, particularly children under five years of age. In Tanzania, prophylaxis against pneumococcal infection among children with SCD advocates the use of both oral penicillin V (PV) and pneumococcal vaccines (PNV). Therefore, this study aimed to investigate nasopharyngeal carriage and antibiogram of Streptococcal pneumoniae (S. pneumoniae) and Staphylococcus aureus (S. aureus) in children with SCD in Tanzania. Methods This cross-sectional study was undertaken at the two Sickle Pan-African Research Consortium (SPARCO) study sites in Dar es salaam, Tanzania. The study was conducted for six months and enrolled children with SCD between the ages of 6 to 59-months. A semi-structured questionnaire was used to collect patient data. Nasopharyngeal swabs were collected from all participants and cultured for Streptococcal pneumoniae and other bacterial isolates. Antimicrobial susceptibility tests of the isolates were done using the disc diffusion method. Results Out of 204 participants, the overall prevalence of bacterial carriage was 53.4%, with S. aureus (23.5%), coagulase-negative Staphylococci (CoNS) (23%) and S. pneumoniae (7.8%) being commonly isolated. In antibiotic susceptibility testing, S. aureus isolates were most resistant to penicillin (81.8%), whereas 81.3% of S. pneumoniae isolates were resistant to co-trimoxazole. The least antimicrobial resistance was observed for chloramphenicol for both S. aureus and S. pneumoniae isolates (6.3% versus 0%). The proportion of multi-drug resistance (MDR) was 66.7% for S. aureus isolates and 25% for S. pneumoniae isolates. Conclusion There are substantially high nasopharyngeal carriage pathogenic bacteria in children with SCD in Dar es Salaam, Tanzania. The presence of MDR strains to the commonly used antibiotics suggests the need to reconsider optimizing antimicrobial prophylaxis in children with SCD and advocacy on pneumococcal vaccines.
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Affiliation(s)
- Ritah F Mutagonda
- Department of Clinical Pharmacy and Pharmacology, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Correspondence: Ritah F Mutagonda, Department of Clinical Pharmacy and Pharmacology, Muhimbili University of Health and Allied Sciences, P.O BOX 65013, Dar es salaam, Tanzania, Tel +255 713 816481, Email ;
| | - George Bwire
- Department of Pharmaceutical Microbiology, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Raphael Zozimus Sangeda
- Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Department of Pharmaceutical Microbiology, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Manase Kilonzi
- Department of Clinical Pharmacy and Pharmacology, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Hamu Mlyuka
- Department of Clinical Pharmacy and Pharmacology, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Joyce Ndunguru
- Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Department of Hematology and Blood Transfusion, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Agnes Jonathan
- Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Department of Hematology and Blood Transfusion, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Julie Makani
- Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Department of Hematology and Blood Transfusion, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Irene Kida Minja
- Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Department of Restorative Dentistry, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Paschal Ruggajo
- Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Department of Internal Medicine, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Emmanuel Balandya
- Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania,Department of Physiology, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
| | - Appolinary A R Kamuhabwa
- Department of Clinical Pharmacy and Pharmacology, Muhimbili University of Health and Allied Sciences, Dar es salaam, Tanzania
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13
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Miellet WR, van Veldhuizen J, Litt D, Mariman R, Wijmenga-Monsuur AJ, Badoux P, Nieuwenhuijsen T, Thombre R, Mayet S, Eletu S, Sheppard C, van Houten MA, Rots NY, Miller E, Fry NK, Sanders EAM, Trzciński K. It Takes Two to Tango: Combining Conventional Culture With Molecular Diagnostics Enhances Accuracy of Streptococcus pneumoniae Detection and Pneumococcal Serogroup/Serotype Determination in Carriage. Front Microbiol 2022; 13:859736. [PMID: 35509314 PMCID: PMC9060910 DOI: 10.3389/fmicb.2022.859736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 03/14/2022] [Indexed: 11/16/2022] Open
Abstract
Background The specificity of molecular methods for the detection of Streptococcus pneumoniae carriage is under debate. We propose a procedure for carriage surveillance and vaccine impact studies that increases the accuracy of molecular detection of live pneumococci in polymicrobial respiratory samples. Methods Culture and qPCR methods were applied to detect pneumococcus and pneumococcal serotypes in 1,549 nasopharyngeal samples collected in the Netherlands (n = 972) and England (n = 577) from 946 toddlers and 603 adults, and in paired oropharyngeal samples collected exclusively from 319 Dutch adults. Samples with no live pneumococci isolated at primary diagnostic culture yet generating signal specific for pneumococcus in qPCRs were re-examined with a second, qPCR-guided culture. Optimal Cq cut-offs for positivity in qPCRs were determined via receiver operating characteristic (ROC) curve analysis using isolation of live pneumococci from the primary and qPCR-guided cultures as reference. Results Detection of pneumococcus and pneumococcal serotypes with qPCRs in cultured (culture-enriched) nasopharyngeal samples exhibited near-perfect agreement with conventional culture (Cohen’s kappa: 0.95). Molecular methods displayed increased sensitivity of detection for multiple serotype carriage, and implementation of qPCR-guided culturing significantly increased the proportion of nasopharyngeal and oropharyngeal samples from which live pneumococcus was recovered (p < 0.0001). For paired nasopharyngeal and oropharyngeal samples from adults none of the methods applied to a single sample type exhibited good agreement with results for primary and qPCR-guided nasopharyngeal and oropharyngeal cultures combined (Cohens kappa; 0.13–0.55). However, molecular detection of pneumococcus displayed increased sensitivity with culture-enriched oropharyngeal samples when compared with either nasopharyngeal or oropharyngeal primary cultures (p < 0.05). Conclusion The accuracy of pneumococcal carriage surveillance can be greatly improved by complementing conventional culture with qPCR and vice versa, by using results of conventional and qPCR-guided cultures to interpret qPCR data. The specificity of molecular methods for the detection of live pneumococci can be enhanced by incorporating statistical procedures based on ROC curve analysis. The procedure we propose for future carriage surveillance and vaccine impact studies improves detection of pneumococcal carriage in adults in particular and enhances the specificity of serotype carriage detection.
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Affiliation(s)
- Willem R Miellet
- Department of Pediatric Immunology and Infectious Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht (UMCU), Utrecht, Netherlands.,Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Janieke van Veldhuizen
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - David Litt
- Respiratory and Vaccine Preventable Bacterial Reference Unit (RVPBRU), Public Health England - National Infection Service, London, United Kingdom
| | - Rob Mariman
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Alienke J Wijmenga-Monsuur
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Paul Badoux
- Regional Laboratory of Public Health (Streeklab) Haarlem, Haarlem, Netherlands
| | - Tessa Nieuwenhuijsen
- Department of Pediatric Immunology and Infectious Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht (UMCU), Utrecht, Netherlands
| | - Rebecca Thombre
- Respiratory and Vaccine Preventable Bacterial Reference Unit (RVPBRU), Public Health England - National Infection Service, London, United Kingdom
| | - Sanaa Mayet
- Respiratory and Vaccine Preventable Bacterial Reference Unit (RVPBRU), Public Health England - National Infection Service, London, United Kingdom
| | - Seyi Eletu
- Respiratory and Vaccine Preventable Bacterial Reference Unit (RVPBRU), Public Health England - National Infection Service, London, United Kingdom
| | - Carmen Sheppard
- Respiratory and Vaccine Preventable Bacterial Reference Unit (RVPBRU), Public Health England - National Infection Service, London, United Kingdom
| | | | - Nynke Y Rots
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Elizabeth Miller
- Immunisation and Countermeasures Division, Public Health England (PHE) - National Infection Service, London, United Kingdom
| | - Norman K Fry
- Respiratory and Vaccine Preventable Bacterial Reference Unit (RVPBRU), Public Health England - National Infection Service, London, United Kingdom.,Immunisation and Countermeasures Division, Public Health England (PHE) - National Infection Service, London, United Kingdom
| | - Elisabeth A M Sanders
- Department of Pediatric Immunology and Infectious Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht (UMCU), Utrecht, Netherlands.,Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Krzysztof Trzciński
- Department of Pediatric Immunology and Infectious Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht (UMCU), Utrecht, Netherlands
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14
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Epidemiological characteristics in serotype 24 pediatric invasive pneumococcal disease according to an 11-year population-based study in Japan. Epidemiol Infect 2022; 150:e66. [PMID: 35311634 PMCID: PMC8950979 DOI: 10.1017/s0950268822000395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
After the introduction of the 13-valent pneumococcal conjugate vaccine (PCV13), serotype replacement has occurred in Japan, and serotype 24 has become the most common serotype in paediatric invasive pneumococcal disease (IPD). To understand the characteristics of serotype 24-IPD in Japanese children in the post-PCV13 era, we conducted a retrospective study in children aged ≤15 years from 2010 to 2020 using a database of paediatric IPD surveillance in Chiba prefecture, Japan. We identified a total of 357 IPD cases and collected clinical information on 225 cases (24: 32 cases, non-24: 193 cases). Compared with the non-serotype 24-IPD, serotype 24-IPD was independently related to be <2 years of age [odds ratio (OR) 3.91, 95% confidence interval (CI) 1.47–10.44; P = 0.0064] and bacteremia (OR 2.28, 95% CI 1.01–5.13; P = 0.0475), as a result of the multivariate regression analysis. We also conducted a bacterial analysis, and the isolates of serotype 24-IPD had tendencies of PCG-susceptible (24: 100.0%, non-24: 61.3%; P < 0.0001) and macrolide-resistance (24: 100.0%, non-24: 87.3%; P = 0.0490). Their multilocus sequence typing was mostly ST2572 and the variants, which were unique to Japan. This tendency might have been a result of the progress made in the Japanese PCV13 immunisation programme.
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15
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Analysing pneumococcal invasiveness using Bayesian models of pathogen progression rates. PLoS Comput Biol 2022; 18:e1009389. [PMID: 35176026 PMCID: PMC8901055 DOI: 10.1371/journal.pcbi.1009389] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 03/07/2022] [Accepted: 01/28/2022] [Indexed: 11/19/2022] Open
Abstract
The disease burden attributable to opportunistic pathogens depends on their prevalence in asymptomatic colonisation and the rate at which they progress to cause symptomatic disease. Increases in infections caused by commensals can result from the emergence of “hyperinvasive” strains. Such pathogens can be identified through quantifying progression rates using matched samples of typed microbes from disease cases and healthy carriers. This study describes Bayesian models for analysing such datasets, implemented in an RStan package (https://github.com/nickjcroucher/progressionEstimation). The models converged on stable fits that accurately reproduced observations from meta-analyses of Streptococcus pneumoniae datasets. The estimates of invasiveness, the progression rate from carriage to invasive disease, in cases per carrier per year correlated strongly with the dimensionless values from meta-analysis of odds ratios when sample sizes were large. At smaller sample sizes, the Bayesian models produced more informative estimates. This identified historically rare but high-risk S. pneumoniae serotypes that could be problematic following vaccine-associated disruption of the bacterial population. The package allows for hypothesis testing through model comparisons with Bayes factors. Application to datasets in which strain and serotype information were available for S. pneumoniae found significant evidence for within-strain and within-serotype variation in invasiveness. The heterogeneous geographical distribution of these genotypes is therefore likely to contribute to differences in the impact of vaccination in between locations. Hence genomic surveillance of opportunistic pathogens is crucial for quantifying the effectiveness of public health interventions, and enabling ongoing meta-analyses that can identify new, highly invasive variants.
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16
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Henares D, Brotons P, de Sevilla MF, Fernandez-Lopez A, Hernandez-Bou S, Perez-Argüello A, Mira A, Muñoz-Almagro C, Cabrera-Rubio R. Differential nasopharyngeal microbiota composition in children according to respiratory health status. Microb Genom 2021; 7. [PMID: 34699345 PMCID: PMC8627214 DOI: 10.1099/mgen.0.000661] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Acute respiratory infections (ARIs) constitute one of the leading causes of antibiotic administration, hospitalization and death among children <5 years old. The upper respiratory tract microbiota has been suggested to explain differential susceptibility to ARIs and modulate ARI severity. The aim of the present study was to investigate the relation of nasopharyngeal microbiota and other microbiological parameters with respiratory health and disease, and to assess nasopharyngeal microbiota diagnostic utility for discriminating between different respiratory health statuses. We conducted a prospective case-control study at Hospital Sant Joan de Deu (Barcelona, Spain) from 2014 to 2018. This study included three groups of children <18 years with gradual decrease of ARI severity: cases with invasive pneumococcal disease (IPD) (representative of lower respiratory tract infections and systemic infections), symptomatic controls with mild viral upper respiratory tract infections (URTI), and healthy/asymptomatic controls according to an approximate case-control ratio 1:2. Nasopharyngeal samples were collected from participants for detection, quantification and serotyping of pneumococcal DNA, viral DNA/RNA detection and 16S rRNA gene sequencing. Microbiological parameters were included on case-control classification models. A total of 140 subjects were recruited (IPD=27, URTI=48, healthy/asymptomatic control=65). Children's nasopharyngeal microbiota composition varied according to respiratory health status and infection severity. The IPD group was characterized by overrepresentation of Streptococcus pneumoniae, higher frequency of invasive pneumococcal serotypes, increased rate of viral infection and underrepresentation of potential protective bacterial species such as Dolosigranulum pigrum and Moraxella lincolnii. Microbiota-based classification models differentiated cases from controls with moderately high accuracy. These results demonstrate the close relationship existing between a child's nasopharyngeal microbiota and respiratory health, and provide initial evidence of the potential of microbiota-based diagnostics for differential diagnosis of severe ARIs using non-invasive samples.
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Affiliation(s)
- Desiree Henares
- Institut de Recerca Sant Joan de Deu, Hospital Sant Joan de Deu, Barcelona, Spain.,CIBER Center for Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
| | - Pedro Brotons
- Institut de Recerca Sant Joan de Deu, Hospital Sant Joan de Deu, Barcelona, Spain.,CIBER Center for Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.,School of Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Mariona F de Sevilla
- CIBER Center for Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.,Pediatric Department, Hospital Sant Joan de Deu, Barcelona, Spain
| | | | | | | | - Alex Mira
- CIBER Center for Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.,Department of Health and Genomics, Center for Advanced Research in Public Health, FISABIO, Valencia, Spain
| | - Carmen Muñoz-Almagro
- Institut de Recerca Sant Joan de Deu, Hospital Sant Joan de Deu, Barcelona, Spain.,CIBER Center for Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.,School of Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Raul Cabrera-Rubio
- Teagasc Food Research Centre (TEAGASC), Moorepark, Fermoy, Cork, Ireland.,APC Microbiome Institute, University College Cork, County Cork, Ireland
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17
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Capsule Promotes Intracellular Survival and Vascular Endothelial Cell Translocation during Invasive Pneumococcal Disease. mBio 2021; 12:e0251621. [PMID: 34634940 PMCID: PMC8510516 DOI: 10.1128/mbio.02516-21] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The polysaccharide capsule that surrounds Streptococcus pneumoniae (Spn) is one of its most important virulence determinants, serving to protect against phagocytosis. To date, 100 biochemical and antigenically distinct capsule types, i.e., serotypes, of Spn have been identified. Yet how capsule influences pneumococcal translocation across vascular endothelial cells (VEC), a key step in the progression of invasive disease, was unknown. Here, we show that despite capsule being inhibitory of Spn uptake by VEC, capsule enhances the escape rate of internalized pneumococci and thereby promotes translocation. Upon investigation, we determined that capsule protected Spn against intracellular killing by VEC and H2O2-mediated killing in vitro. Using a nitroblue tetrazolium reduction assay and nuclear magnetic resonance (NMR) analyses, purified capsule was confirmed as having antioxidant properties which varied according to serotype. Using an 11-member panel of isogenic capsule-switch mutants, we determined that serotype affected levels of Spn resistance to H2O2-mediated killing in vitro, with killing resistance correlated positively with survival duration within VEC, rate of transcytosis to the basolateral surface, and human attack rates. Experiments with mice supported our in vitro findings, with Spn producing oxidative-stress-resistant type 4 capsule being more organ-invasive than that producing oxidative-stress-sensitive type 2 capsule during bacteremia. Capsule-mediated protection against intracellular killing was also observed for Streptococcus pyogenes and Staphylococcus aureus. We conclude that capsular polysaccharide plays an important role within VEC, serving as an intracellular antioxidant, and that serotype-dependent differences in antioxidant capabilities impact the efficiency of VEC translocation and a serotype’s potential for invasive disease.
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18
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Cassir N, Luciani L, Ferrieux D, Levasseur A, Fournier PE, Parola P. Pneumococcal pneumonia among shipyard workers: Inside the features of disease onset. Travel Med Infect Dis 2021; 44:102183. [PMID: 34688890 DOI: 10.1016/j.tmaid.2021.102183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 09/21/2021] [Accepted: 10/18/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND Several outbreaks of pneumococcal pneumonia among shipyard workers have been described. In this study, following a previous report of grouped cases, we aimed to elucidate the features of disease onset. METHODS We compared the population characteristics of shipyard workers with a confirmed diagnosis of pneumococcal pneumonia (N = 38) to those of workers without pneumonia (N = 53). We compared nine S. pneumoniae strains isolated from patients with pneumonia by capsular serotyping, multi-locus sequence typing, and whole genome sequencing. RESULTS Shipyard workers with Streptococcus pneumoniae pneumonia were more frequently from Italy (P = 0.016), had at least one underlying condition (P = 0.024), lived on-board the ship (P = 0.009). None of these factors was independent by multivariate analysis. While capsular serotyping enabled us to identify four different serotypes: 4 (n = 5), 8 (n = 2), 9 N (n = 1), and 3 (n = 1), by sequence typing, we distinguished five sequence types (STs): ST801 (n = 4), ST205 (n = 2), ST1220 (n = 1), ST1280 (n = 1), and ST66 (n = 1). Whole genome sequencing confirmed the results obtained by MLST. Genomes of isolates of the same sequence type were similar with ≤80 single-nucleotide polymorphisms. CONCLUSIONS We confirmed that the onset of pneumococcal infection among shipyard workers was attributable to both a person-to-person spread of single strains of S. pneumoniae and a shift of different strains from commensal to pathogen under favourable conditions (professional exposure, viral infections). Control measures should therefore be implemented by taking into account these features.
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Affiliation(s)
- Nadim Cassir
- IHU-Méditerranée Infection, Marseille, France; Aix Marseille Univ, IRD, AP-HM, MEPHI, Marseille, France.
| | - Léa Luciani
- IHU-Méditerranée Infection, Marseille, France
| | | | - Anthony Levasseur
- IHU-Méditerranée Infection, Marseille, France; Aix Marseille Univ, IRD, AP-HM, MEPHI, Marseille, France
| | - Pierre-Edouard Fournier
- IHU-Méditerranée Infection, Marseille, France; Aix Marseille Univ IRD, AP-HM, VITROME, Marseille, France
| | - Philippe Parola
- IHU-Méditerranée Infection, Marseille, France; Aix Marseille Univ IRD, AP-HM, VITROME, Marseille, France
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19
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Andrejko K, Ratnasiri B, Lewnard JA. Association of pneumococcal serotype with susceptibility to antimicrobial drugs: a systematic review and meta-analysis. Clin Infect Dis 2021; 75:131-140. [PMID: 34599811 DOI: 10.1093/cid/ciab852] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Pneumococcal serotypes differ in antimicrobial susceptibility. However, patterns and causes of this variation are not comprehensively understood. METHODS We undertook a systematic review of epidemiologic studies of pneumococci isolated from carriage or invasive disease among children globally from 2000-2019. We evaluated associations of each serotype with nonsusceptibility to penicillin, macrolides, and trimethoprim/sulfamethoxazole. We evaluated differences in the prevalence of nonsusceptibility to major antibiotic classes across serotypes using random effects meta-regression models, and assessed changes in prevalence of nonsusceptibility after implementation of pneumococcal conjugate vaccines (PCVs). We also evaluated associations between biological characteristics of serotypes and their likelihood of nonsusceptibility to each drug. RESULTS We included data from 129 studies representing 32,187 isolates across 52 countries. Within serotypes, the proportion of nonsusceptible isolates varied geographically and over time, in settings using and those not using PCVs. Factors predicting enhanced fitness of serotypes in colonization as well as enhanced pathogenicity were each associated with higher likelihood of nonsusceptibility to penicillin, macrolides, and trimethoprim/sulfamethoxazole. Increases in prevalence of nonsusceptibility following PCV implementation were evident among non-PCV serotypes including 6A, 6C, 15A, 15B/C, 19A, and 35B; however, this pattern was not universally evident among non-PCV serotypes. Post-vaccination increases in nonsusceptibility for serotypes 6A and 19A were attenuated in settings that implemented PCV13. CONCLUSIONS In pneumococci, nonsusceptibility to penicillin, macrolides, and trimethoprim/sulfamethoxazole is associated with more frequent opportunities for antibiotic exposure during both prolonged carriage episodes and when serotypes cause disease. These findings suggest multiple pathways leading to resistance selection in pneumococci.
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Affiliation(s)
- Kristin Andrejko
- Division of Epidemiology, School of Public Health, University of California, Berkeley, Berkeley, California, United States
| | - Buddhika Ratnasiri
- College of Letters & Science, University of California, Berkeley, Berkeley, California, United States
| | - Joseph A Lewnard
- Division of Epidemiology, School of Public Health, University of California, Berkeley, Berkeley, California, United States.,Division of Infectious Diseases & Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States.,Center for Computational Biology, College of Engineering, University of California, Berkeley, Berkeley, California, United States
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20
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Green AE, Howarth D, Chaguza C, Echlin H, Langendonk RF, Munro C, Barton TE, Hinton JCD, Bentley SD, Rosch JW, Neill DR. Pneumococcal Colonization and Virulence Factors Identified Via Experimental Evolution in Infection Models. Mol Biol Evol 2021; 38:2209-2226. [PMID: 33502519 PMCID: PMC8136498 DOI: 10.1093/molbev/msab018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Streptococcus pneumoniae is a commensal of the human nasopharynx and a major cause of respiratory and invasive disease. We examined adaptation and evolution of pneumococcus, within nasopharynx and lungs, in an experimental system where the selective pressures associated with transmission were removed. This was achieved by serial passage of pneumococci, separately, in mouse models of nasopharyngeal carriage or pneumonia. Passaged pneumococci became more effective colonizers of the respiratory tract and we observed several examples of potential parallel evolution. The cell wall-modifying glycosyltransferase LafA was under strong selection during lung passage, whereas the surface expressed pneumococcal vaccine antigen gene pvaA and the glycerol-3-phosphate dehydrogenase gene gpsA were frequent targets of mutation in nasopharynx-passaged pneumococci. These mutations were not identified in pneumococci that were separately evolved by serial passage on laboratory agar. We focused on gpsA, in which the same single nucleotide polymorphism arose in two independently evolved nasopharynx-passaged lineages. We describe a new role for this gene in nasopharyngeal carriage and show that the identified single nucleotide change confers resistance to oxidative stress and enhanced nasopharyngeal colonization potential. We demonstrate that polymorphisms in gpsA arise and are retained during human colonization. These findings highlight how within-host environmental conditions can determine trajectories of bacterial evolution. Relative invasiveness or attack rate of pneumococcal lineages may be defined by genes that make niche-specific contributions to bacterial fitness. Experimental evolution in animal infection models is a powerful tool to investigate the relative roles played by pathogen virulence and colonization factors within different host niches.
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Affiliation(s)
- Angharad E Green
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Deborah Howarth
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Chrispin Chaguza
- Parasites and Microbes Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, United Kingdom
| | - Haley Echlin
- Department of Infectious Disease, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - R Frèdi Langendonk
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Connor Munro
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Thomas E Barton
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Jay C D Hinton
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Stephen D Bentley
- Parasites and Microbes Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Cambridge, United Kingdom
| | - Jason W Rosch
- Department of Infectious Disease, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Daniel R Neill
- Department of Clinical Infection, Microbiology and Immunology, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
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21
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Single nucleotide polymorphisms within the cps loci: another potential source of clinically important genetic variation for Streptococcus pneumoniae? Infect Immun 2021; 89:e0037421. [PMID: 34338550 DOI: 10.1128/iai.00374-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Streptococcus pneumoniae capsule is essential for disease pathogenesis, suggesting that even minor genetic changes within the cps locus could potentially have important consequences. Arends et al. have identified 79 different non-synonymous SNPs in the cps locus of 338 19A serotype strains, and shown significant variations between strains in nucleotide sugars content and capsule shedding. Further work is required to characterise whether any of these changes have important functional consequences on capsule/host interactions.
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A Tn-seq Screen of Streptococcus pneumoniae Uncovers DNA Repair as the Major Pathway for Desiccation Tolerance and Transmission. Infect Immun 2021; 89:e0071320. [PMID: 34031124 DOI: 10.1128/iai.00713-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Streptococcus pneumoniae is an opportunistic pathogen that is a common cause of serious invasive diseases such as pneumonia, bacteremia, meningitis, and otitis media. Transmission of this bacterium has classically been thought to occur through inhalation of respiratory droplets and direct contact with nasal secretions. However, the demonstration that S. pneumoniae is desiccation tolerant and, therefore, environmentally stable for extended periods of time opens up the possibility that this pathogen is also transmitted via contaminated surfaces (fomites). To better understand the molecular mechanisms that enable S. pneumoniae to survive periods of desiccation, we performed a high-throughput transposon sequencing (Tn-seq) screen in search of genetic determinants of desiccation tolerance. We identified 42 genes whose disruption reduced desiccation tolerance and 45 genes that enhanced desiccation tolerance. The nucleotide excision repair pathway was the most enriched category in our Tn-seq results, and we found that additional DNA repair pathways are required for desiccation tolerance, demonstrating the importance of maintaining genome integrity after desiccation. Deletion of the nucleotide excision repair gene uvrA resulted in a delay in transmission between infant mice, indicating a correlation between desiccation tolerance and pneumococcal transmssion. Understanding the molecular mechanisms that enable pneumococcal persistence in the environment may enable targeting of these pathways to prevent fomite transmission, thereby preventing the establishment of new colonization and any resulting invasive disease.
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Cohen R, Levy C, Ouldali N, Goldrey M, Béchet S, Bonacorsi S, Varon E. Invasive Disease Potential of Pneumococcal Serotypes in Children After PCV13 Implementation. Clin Infect Dis 2021; 72:1453-1456. [PMID: 32804200 DOI: 10.1093/cid/ciaa917] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/26/2020] [Indexed: 01/08/2023] Open
Abstract
We aimed to assess the invasive disease potential of non-PCV13 serotypes after the implementation of this vaccine. Most non-PCV13 serotypes had low invasive disease potential. Among serotypes with the highest invasive disease potential (12F, 24F, 38, 8, 33F, 22F, and 10A), all but 24F and 38 were included in PCV20.
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Affiliation(s)
- Robert Cohen
- Association Clinique et Thérapeutique Infantile du Val-de-Marne, Créteil, France.,Groupe de Pathologie Infectieuse Pédiatrique, Paris, France.,Unité Court Séjour, Petits Nourrissons, Service de Néonatalogie, Centre Hospitalier Intercommunal de Créteil, Créteil, France.,Université Paris Est, IMRB-GRC GEMINI, Créteil, France.,Clinical Research Center, Centre Hospitalier Intercommunal de Créteil, Créteil, France
| | - Corinne Levy
- Association Clinique et Thérapeutique Infantile du Val-de-Marne, Créteil, France.,Groupe de Pathologie Infectieuse Pédiatrique, Paris, France.,Université Paris Est, IMRB-GRC GEMINI, Créteil, France.,Clinical Research Center, Centre Hospitalier Intercommunal de Créteil, Créteil, France
| | - Naim Ouldali
- Association Clinique et Thérapeutique Infantile du Val-de-Marne, Créteil, France.,Groupe de Pathologie Infectieuse Pédiatrique, Paris, France.,Unité d'Epidémiologie Clinique, Assistance Publique-Hôpitaux de Paris, Hôpital Robert Debré, ECEVE INSERM UMR 1123, Paris, France
| | - Marie Goldrey
- Association Française de Pédiatrie Ambulatoire, Saint-Germain-en-Laye, France
| | - Stéphane Béchet
- Association Clinique et Thérapeutique Infantile du Val-de-Marne, Créteil, France
| | - Stéphane Bonacorsi
- Université Paris Diderot, Sorbonne Paris Cité, France.,Service de Microbiologie, Assistance Publique-Hôpitaux de Paris, Hôpital Robert-Debré, Paris, France
| | - Emmanuelle Varon
- Groupe de Pathologie Infectieuse Pédiatrique, Paris, France.,National Reference Center for Pneumococci, Centre Hospitalier Intercommunal de Créteil, Créteil, France
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24
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Joshi SS, Al-Mamun MA, Weinberger DM. Correlates of Nonrandom Patterns of Serotype Switching in Pneumococcus. J Infect Dis 2021; 221:1669-1676. [PMID: 31875229 DOI: 10.1093/infdis/jiz687] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 12/23/2019] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Pneumococcus is a diverse pathogen, with >90 serotypes, each of which has a distinct polysaccharide capsule. Pneumococci can switch capsules, evading vaccine pressure. Certain serotype pairs are more likely to occur on the same genetic background as a results of serotype switching, but the drivers of these patterns are not well understood. METHODS We used the PubMLST and Global Pneumococcal Sequencing Project databases to quantify the number of genetic lineages on which different serotype pairs occur together. We also quantified the genetic diversity of each serotype. Regression model were used to evaluate the relationship between shared polysaccharide components and the frequency of serotype co-occurrence and diversity. RESULTS A number of serotype pairs occurred together on the same genetic lineage more commonly than expected. Co-occurrence of between-serogroup pairs was more common when both serotypes had glucose as a component of the capsule (and, potentially, glucuronic acid, any-N-acetylated sugar, or ribitol). Diversity also varied markedly by serotype and was associated with the presence of specific sugars in the capsule. CONCLUSIONS Certain pairs of serotypes are more likely to co-occur on the same genetic background. These patterns were correlated with shared polysaccharide components. This might reflect adaptation of strains to produce capsules with specific characteristics.
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Affiliation(s)
- Shreyas S Joshi
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
| | - Mohammad A Al-Mamun
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
| | - Daniel M Weinberger
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
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25
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Pneumococcal colonization among healthy and hospitalized vaccine-naive Sri Lankan children. Vaccine 2020; 38:7308-7315. [PMID: 32981783 DOI: 10.1016/j.vaccine.2020.09.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/05/2020] [Accepted: 09/14/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Streptococcus pneumoniae continues to cause mortality and morbidity despite availability of effective vaccines. Pneumococcal colonization is considered a pre-requisite for disease. Identifying the serotypes circulating in a given locale is important for surveillance purposes as well as for assessing the need for vaccination. Aim of the present study was to identify nasopharyngeal pneumococcal colonization rates in healthy children and children with respiratory tract infections in central Sri Lanka. METHOD A total of 450 nasopharyngeal swabs (NPS) of children aged between 2 months and 2 years were collected from two groups; healthy children and children hospitalized with respiratory symptoms. NPS samples were processed using conventional laboratory techniques to isolate S. pneumoniae. Antibiotic susceptibility patterns of pneumococcal isolates were identified using CLSI disc diffusion method and minimum inhibitory concentration (MIC) was determined by micro-broth dilution method. RESULTS Pneumococcal colonization rate among healthy children was 31.8% (143/450) it was 39.8% (179/450) in children hospitalized with respiratory symptoms. MIC for penicillin and cefotaxime ranged between 0.015 to 4 µg/ml and <0.015 to 16 µg/ml respectively. All isolates were susceptible to levofloxacin, vancomycin, linezolid and rifampicin. Erythromycin and tetracycline non-susceptibility rates were >50% in both groups. The predominant serotypes identified were 19F (n = 66, 20.5%), 6B (n = 43, 13.4%), 6A (n = 30, 9.3%), 23F (n = 28, 8.7%) and 14 (n = 20, 6.2%). Among healthy children, presence of school going children at home and the number of household members were significantly associated with pneumococcal colonization while in hospitalized children, pneumococcal colonization was significantly associated with presence of school going children at home. CONCLUSION Pneumococcal colonization rates were considerably higher in both study cohorts and the commonest serotypes were 19F, 6B, 6A, 23F and 14. Antibiotic resistance rates were also relatively higher among the pneumococcal isolates.
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Linkevicius M, Cristea V, Siira L, Mäkelä H, Toropainen M, Pitkäpaasi M, Dub T, Nohynek H, Puumalainen T, Rintala E, Laaksonen ME, Feuth T, Grönroos JO, Peltoniemi J, Frilander H, Lindström I, Sane J. Outbreak of invasive pneumococcal disease among shipyard workers, Turku, Finland, May to November 2019. ACTA ACUST UNITED AC 2020; 24. [PMID: 31822326 PMCID: PMC6905297 DOI: 10.2807/1560-7917.es.2019.24.49.1900681] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report an outbreak of invasive pneumococcal disease and pneumococcal pneumonia among shipyard workers, in Turku, Southwest Finland. In total, 31 confirmed and six probable cases were identified between 3 May and 28 November 2019. Streptococcus pneumoniae serotypes 12F, 4 and 8 were isolated from blood cultures of 25 cases. Occupational hygiene measures and vaccination of ca 4,000 workers are underway to control the outbreak at the shipyard.
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Affiliation(s)
- Marius Linkevicius
- European Programme for Public Health Microbiology Training (EUPHEM), European Centre for Disease Prevention and Control, Stockholm, Sweden.,Expert Microbiology Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Veronica Cristea
- European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control, Stockholm, Sweden.,Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Lotta Siira
- Expert Microbiology Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Henna Mäkelä
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Maija Toropainen
- Expert Microbiology Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Marjaana Pitkäpaasi
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Timothee Dub
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Hanna Nohynek
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Taneli Puumalainen
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
| | - Esa Rintala
- Department of Hospital Hygiene and Infection Control, Turku University Hospital (TYKS), Turku, Finland
| | - Merja E Laaksonen
- Department of Hospital Hygiene and Infection Control, Turku University Hospital (TYKS), Turku, Finland
| | - Thijs Feuth
- Department of Pulmonary Diseases and Clinical Allergology, University of Turku, Turku, Finland.,Division of Medicine, Department of Pulmonary Diseases, Turku University Hospital (TYKS), Turku Finland
| | - Juha O Grönroos
- Department of Clinical Microbiology, Turku University Hospital (TYKS), Turku, Finland
| | - Jutta Peltoniemi
- Infection Control Unit, Welfare Division, City of Turku, Finland
| | | | | | - Jussi Sane
- Infectious Disease Control and Vaccinations Unit, Department of Health Security, Finnish Institute for Health and Welfare (THL), Helsinki, Finland
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Faingelernt Y, Dagan R, Givon-Lavi N, Ben-Shimol S, Bar-Ziv J, Greenberg D. Nasopharyngeal Carriage of Invasive Pneumococcal Serotypes During Childhood Community-Acquired Alveolar Pneumonia Is Associated With Specific Clinical Presentation. J Infect Dis 2019; 221:812-819. [DOI: 10.1093/infdis/jiz513] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/02/2019] [Indexed: 01/10/2023] Open
Abstract
Abstract
Background
Streptococcus pneumoniae (Pnc) serotypes differ in invasive potential. We examined whether community-acquired alveolar pneumonia (CAAP) in children carrying commonly recognized pneumonia invasive pneumococcal serotypes ([PnIST] 1, 5, 7F, 14, and 19A) differs from CAAP in children carrying less invasive serotypes (non-PnIST) or no Pnc (Pnc-neg).
Methods
Children <5 years, visiting the only regional Pediatric Emergency Room, with radiologically proven CAAP were enrolled. Nasopharyngeal cultures were processed for pneumococcal isolation and serotyping. Clinical and demographic characteristics were recorded. The study was conducted before pneumococcal conjugate vaccine implementation in Israel.
Results
A total of 1423 CAAP episodes were recorded: PnIST, 300 (21.1%); non-PnIST, 591 (41.5%); and Pnc-neg, 532 (37.4%). After adjustment for age, ethnicity, seasonality, and previous antibiotics, the following variables were positively associated with PnIST carriage compared with both groups: temperature ≥39°C, peripheral white blood cell count ≥20 000/mm3, C-reactive protein ≥70.0 mg/L, and serum sodium <135 mEq/L. Lower oxygen saturation, viral detection, and comorbidities were negatively associated with Pn-IST carriage (odds ratios, <1.0). Differences between non-PnIST carriers and Pnc-neg groups were smaller or nonsignificant.
Conclusions
Young children with CAAP carrying common PnIST had a lower proportion of comorbidities, hypoxemia, and viral detection and had more intense systemic inflammatory response than those carrying non-PnIST or not carrying Pnc.
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Affiliation(s)
- Yaniv Faingelernt
- The Pediatric Infectious Disease Unit, Soroka University Medical Center, Beer-Sheva, Israel
- The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ron Dagan
- The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Noga Givon-Lavi
- The Pediatric Infectious Disease Unit, Soroka University Medical Center, Beer-Sheva, Israel
- The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Shalom Ben-Shimol
- The Pediatric Infectious Disease Unit, Soroka University Medical Center, Beer-Sheva, Israel
- The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Jacob Bar-Ziv
- Department of Radiology, Hadassah University Medical Center, Jerusalem
| | - David Greenberg
- The Pediatric Infectious Disease Unit, Soroka University Medical Center, Beer-Sheva, Israel
- The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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28
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Invasive Pneumococcal Disease and Influenza Activity in a Pediatric Population: Impact of PCV13 Vaccination in Pandemic and Nonpandemic Influenza Periods. J Clin Microbiol 2019; 57:JCM.00363-19. [PMID: 31189583 DOI: 10.1128/jcm.00363-19] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 06/02/2019] [Indexed: 11/20/2022] Open
Abstract
The objective of this study was to analyze the incidence, clinical presentation, and severity of invasive pneumococcal disease (IPD)-causing serotypes and the impact of the 13-valent pneumococcal conjugate vaccination during epidemic and nonepidemic influenza periods in Catalonia, Spain. This was a prospective study in persons aged <18 years diagnosed with IPD between 2012 and 2015 in three Catalan pediatric hospitals. IPD was defined as clinical infection together with isolation of Streptococcus pneumoniae by culture and/or detection by reverse transcription-PCR in a normally sterile sample. Incidence rate ratios (IRRs) and the fraction of IPD prevented associated with 13-valent pneumococcal conjugate vaccine (PCV13) were calculated. The bivariate analysis used the χ2 test and the multivariate analysis nonconditional logistic regression. A total of 229 cases of IPD were recorded. The incidence was higher during influenza epidemic periods (IRR, 2.7; 95% confidence interval [CI], 2.05 to 3.55; P < 0.001), especially for pneumonia (IRR, 3.25; 95% CI, 2.36 to 4.47; P < 0.001), with no differences in the distribution of pneumococcal serotypes. Complications during admission and sequel at discharge were greater during epidemic periods (adjusted odds ratio [aOR], 2.00; 95% CI, 1.06 to 3.77; P = 0.03) than at nonepidemic periods (aOR, 3.38; 95% CI, 1.37 to 8.29; P = 0.01). The prevented fraction for the population (PFp) of IPD in children aged 7 to 59 months was 48% to 49.4%. The PFp was higher in influenza epidemic than nonepidemic periods and increased when ≥2 doses of PCV13 or ≥1 after 24 months were administered. Influenza virus circulation increases the incidence of IPD in persons aged <18 years. In influenza epidemic periods, IPD cases were more severe. Increased PCV13 coverage might increase the fraction of IPD prevented in epidemic and nonepidemic periods.
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29
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van Werkhoven CH, Huijts SM. Vaccines to Prevent Pneumococcal Community-Acquired Pneumonia. Clin Chest Med 2019; 39:733-752. [PMID: 30390745 DOI: 10.1016/j.ccm.2018.07.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Streptococcus pneumoniae is the most frequent pathogen in community-acquired pneumonia and also causes invasive diseases like bacteremia and meningitis. Young children and elderly are especially at risk for pneumococcal diseases and are, therefore, eligible for pneumococcal vaccination in most countries. This reviews provides an overview of the current epidemiology of pneumococcal infections, history and evidence of available pneumococcal polysaccharide and conjugate vaccines, and current recommendations.
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Affiliation(s)
- Cornelis H van Werkhoven
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, PO-Box 85500, Utrecht 3508 GA, The Netherlands.
| | - Susanne M Huijts
- Department of Respiratory Medicine, University Medical Center Utrecht, PO-Box 85500, Utrecht 3508 GA, The Netherlands
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Resistance diagnostics as a public health tool to combat antibiotic resistance: A model-based evaluation. PLoS Biol 2019; 17:e3000250. [PMID: 31095567 PMCID: PMC6522007 DOI: 10.1371/journal.pbio.3000250] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 04/12/2019] [Indexed: 01/12/2023] Open
Abstract
Rapid point-of-care resistance diagnostics (POC-RD) are a key tool in the fight against antibiotic resistance. By tailoring drug choice to infection genotype, doctors can improve treatment efficacy while limiting costs of inappropriate antibiotic prescription. Here, we combine epidemiological theory and data to assess the potential of resistance diagnostics (RD) innovations in a public health context, as a means to limit or even reverse selection for antibiotic resistance. POC-RD can be used to impose a nonbiological fitness cost on resistant strains by enabling diagnostic-informed treatment and targeted interventions that reduce resistant strains' opportunities for transmission. We assess this diagnostic-imposed fitness cost in the context of a spectrum of bacterial population biologies and find that POC-RD have a greater potential against obligate pathogens than opportunistic pathogens already subject to selection under "bystander" antibiotic exposure during asymptomatic carriage (e.g., the pneumococcus). We close by generalizing the notion of RD-informed strategies to incorporate carriage surveillance information and illustrate that coupling transmission-control interventions to the discovery of resistant strains in carriage can potentially select against resistance in a broad range of opportunistic pathogens.
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31
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Crellen T, Rao VB, Piening T, Zeydner J, Siddiqui MR. Seasonal upsurge of pneumococcal meningitis in the Central African Republic. Wellcome Open Res 2019; 3:134. [PMID: 31069258 DOI: 10.12688/wellcomeopenres.14868.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2018] [Indexed: 11/20/2022] Open
Abstract
A high incidence of bacterial meningitis was observed in the Central African Republic (CAR) from December 2015 to May 2017 in three hospitals in the northwest of the country that are within the African meningitis belt. The majority of cases were caused by Streptococcus pneumoniae (249/328; 75.9%), which occurred disproportionately during the dry season (November-April) with a high case-fatality ratio of 41.6% (95% confidence interval [CI] 33.0, 50.8%). High rates of bacterial meningitis during the dry season in the meningitis belt have typically been caused by Neisseria meningitidis (meningococcal meningitis), and our observations suggest that the risk of contracting S. pneumoniae (pneumococcal) meningitis is increased by the same environmental factors. Cases of meningococcal meningitis (67/328; 20.4%) observed over the same period were predominantly group W and had a lower case fatality rate of 9.6% (95% CI 3.6, 21.8%). Due to conflict and difficulties in accessing medical facilities, it is likely that the reported cases represented only a small proportion of the overall burden. Nationwide vaccination campaigns in the CAR against meningitis have been limited to the use of MenAfriVac, which targets only meningococcal meningitis group A. We therefore highlight the need for expanded vaccine coverage to prevent additional causes of seasonal outbreaks.
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Affiliation(s)
- Thomas Crellen
- Department of Mathematical and Economic Modelling, Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, 10400, Thailand.,Médecins Sans Frontières Operational Centre Amsterdam, Bangui, Boite Postale 1793, Central African Republic
| | | | | | - Joke Zeydner
- Médecins Sans Frontières Operational Centre Amsterdam, Bangui, Boite Postale 1793, Central African Republic
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32
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Crellen T, Rao VB, Piening T, Zeydner J, Siddiqui MR. Seasonal upsurge of pneumococcal meningitis in the Central African Republic. Wellcome Open Res 2019; 3:134. [PMID: 31069258 PMCID: PMC6480959 DOI: 10.12688/wellcomeopenres.14868.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2019] [Indexed: 11/20/2022] Open
Abstract
A high incidence of bacterial meningitis was observed in the Central African Republic (CAR) from December 2015 to May 2017 in three hospitals in the northwest of the country that are within the African meningitis belt. The majority of cases were caused by Streptococcus pneumoniae (249/328; 75.9%), which occurred disproportionately during the dry season (November-April) with a high case-fatality ratio of 41.6% (95% confidence interval [CI] 33.0, 50.8%). High rates of bacterial meningitis during the dry season in the meningitis belt have typically been caused by Neisseria meningitidis (meningococcal meningitis), and our observations suggest that the risk of contracting S. pneumoniae (pneumococcal) meningitis is increased by the same environmental factors. Cases of meningococcal meningitis (67/328; 20.4%) observed over the same period were predominantly group W and had a lower case fatality rate of 9.6% (95% CI 3.6, 21.8%). Due to conflict and difficulties in accessing medical facilities, it is likely that the reported cases represented only a small proportion of the overall burden. Nationwide vaccination campaigns in the CAR against meningitis have been limited to the use of MenAfriVac, which targets only meningococcal meningitis group A. We therefore highlight the need for expanded vaccine coverage to prevent additional causes of seasonal outbreaks.
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Affiliation(s)
- Thomas Crellen
- Department of Mathematical and Economic Modelling, Mahidol-Oxford Tropical Medicine Research Unit, Bangkok, 10400, Thailand.,Médecins Sans Frontières Operational Centre Amsterdam, Bangui, Boite Postale 1793, Central African Republic
| | | | | | - Joke Zeydner
- Médecins Sans Frontières Operational Centre Amsterdam, Bangui, Boite Postale 1793, Central African Republic
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33
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Complete Genome Sequence of a Sequence Type 4846 Streptococcus pneumoniae Serotype 12F Strain Isolated from a Meningitis Case in Japan. Microbiol Resour Announc 2019; 8:8/11/e01632-18. [PMID: 30938327 PMCID: PMC6424211 DOI: 10.1128/mra.01632-18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Streptococcus pneumoniae serotype 12F rarely colonizes the nasopharynx but commonly causes invasive pneumococcal disease. Here, we report the complete genome sequence of a sequence type 4846 (ST4846) S. pneumoniae serotype 12F strain isolated from a cluster of invasive pneumococcal disease patients in Japan. Streptococcus pneumoniae serotype 12F rarely colonizes the nasopharynx but commonly causes invasive pneumococcal disease. Here, we report the complete genome sequence of a sequence type 4846 (ST4846) S. pneumoniae serotype 12F strain isolated from a cluster of invasive pneumococcal disease patients in Japan.
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34
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Epidemiological and clinical features of invasive pneumococcal disease caused by serotype 12F in adults, Japan. PLoS One 2019; 14:e0212418. [PMID: 30789928 PMCID: PMC6383924 DOI: 10.1371/journal.pone.0212418] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 02/02/2019] [Indexed: 11/19/2022] Open
Abstract
Enhanced surveillance of invasive pneumococcal disease (IPD) in adults was conducted during April 2013–March 2018 in 10 of 47 prefectures in Japan, and a total of 1277 IPD patients were enrolled. An emergence of IPD caused by serotype 12F was identified during May 2015–March 2018 through this surveillance. 12F isolates were composed of four related sequence types. In total, 120 patients with 12F IPD were reported during this period. To characterize the clinical features of 12F IPD, the disease characteristics of these patients were compared with those of 1157 patients with non-12F IPD. Compared with the non-12F IPD patients, a significantly lower proportion of 12F IPD patients was aged 65 years or older (55% vs. 70%), vaccinated with 23-valent pneumococcal polysaccharide (4% vs. 14%), had comorbid illness (65% vs. 77%), or were immunocompromised (19% vs. 30%; all P < 0.05). No significant difference in the proportion of case fatalities was found between the two groups. The proportions of those aged 65 years or older (53% vs. 69%) and with bacteremic pneumonia (35% vs. 69%) were significantly lower in 17 patients who died from 12F IPD than in 205 patients who died from non-12F IPD (all P < 0.05). Differences in clinical features were similarly found between 12F IPD patients and patients in low- or intermediate-level invasive potential serogroups. Our data demonstrated that serotype 12F was associated with IPD in younger adults and a lower proportion of comorbid illness, including immunocompromised conditions, in adult IPD, suggesting the high invasive potential of the serotype 12F. In addition, patients who died from 12F IPD were younger and had proportionately more bacteremia without focus. These findings may provide new insight into the pathogenesis of IPD in adults caused by 12F serotype with a high invasive potential.
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35
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Camelo-Castillo A, Henares D, Brotons P, Galiana A, Rodríguez JC, Mira A, Muñoz-Almagro C. Nasopharyngeal Microbiota in Children With Invasive Pneumococcal Disease: Identification of Bacteria With Potential Disease-Promoting and Protective Effects. Front Microbiol 2019; 10:11. [PMID: 30745895 PMCID: PMC6360994 DOI: 10.3389/fmicb.2019.00011] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 01/07/2019] [Indexed: 01/26/2023] Open
Abstract
Background and Aims: The risk of suffering from some infectious diseases can be related to specific microbiota profiles. Specifically, the nasopharyngeal microbiota could play a role as a risk or protective factor in the development of invasive disease caused by S. pneumoniae. Methodology: We analyzed the nasopharyngeal microbiota of children with invasive pneumococcal disease (IPD) and that of healthy controls matched by age, sex, and seasonality from Catalonia, Spain. Epidemiological, microbiological and clinical variables were considered to compare microbiota profiles, analyzed by sequencing the V1-V4 region of the 16S rRNA gene. Results: Twenty-eight children with IPD (median age 43 months) and 28 controls (42.6 months) were included in the study. IPD children presented a significantly higher bacterial diversity and richness (p < 0.001). Principal coordinate analysis revealed three different microbiota profiles: microbiota A, dominated by the genus Dolosigranulum (44.3%); Microbiota B, mostly represented by Streptococcus (36.9%) and Staphylococcus (21.3%) and a high diversity of anaerobic genera including Veillonella, Prevotella and Porphyromonas; and Microbiota C, mainly containing Haemophilus (52.1%) and Moraxella (31.4%). The only explanatory factor for the three microbiotas was the classification of children into disease or healthy controls (p = 0.006). A significant negative correlation was found between Dolosigranulum vs. Streptococcus (p = 0.029), suggesting a potential antagonistic effect against pneumococcal pathogens. Conclusions: The higher bacterial diversity and richness in children with IPD could suggest an impaired immune response. This lack of immune competence could be aggravated by breastfeeding <6 months and by the presence of keystone pathogens such as Porphyromonas, a bacterium which has been shown to be able to manipulate the immune response, and that could favor the overgrowth of many proteolytic anaerobic organisms giving rise to a dramatic dysbiosis. From an applied viewpoint, we found suggestive microbiota profiles associated to IPD or asymptomatic colonization that could be used as disease biomarkers or to pave the way for characterizing health-associated inhabitants of the respiratory tract. The identification of beneficial bacteria could be useful to prevent pneumococcal infections by integrating those microorganisms in a probiotic formula. The present study suggests not only respiratory tract samples, but also breast milk, as a potential source of those beneficial bacteria.
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Affiliation(s)
- Anny Camelo-Castillo
- Institut de Recerca Sant Joan de Déu, Hospital Sant Joan de Déu, Barcelona, Spain
| | - Desirée Henares
- Institut de Recerca Sant Joan de Déu, Hospital Sant Joan de Déu, Barcelona, Spain.,Network of Epidemiology and Public Health, CIBERESP, Barcelona, Spain
| | - Pedro Brotons
- Institut de Recerca Sant Joan de Déu, Hospital Sant Joan de Déu, Barcelona, Spain.,Network of Epidemiology and Public Health, CIBERESP, Barcelona, Spain
| | - Antonio Galiana
- Department of Microbiology, Hospital de Alicante, Alicante, Spain
| | | | - Alex Mira
- Network of Epidemiology and Public Health, CIBERESP, Barcelona, Spain.,Center for Advanced Research in Public Health, FISABIO Foundation, Valencia, Spain
| | - Carmen Muñoz-Almagro
- Institut de Recerca Sant Joan de Déu, Hospital Sant Joan de Déu, Barcelona, Spain.,Network of Epidemiology and Public Health, CIBERESP, Barcelona, Spain.,School of Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
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36
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Emgård M, Msuya SE, Nyombi BM, Mosha D, Gonzales-Siles L, Nordén R, Geravandi S, Mosha V, Blomqvist J, Franzén S, Sahlgren F, Andersson R, Skovbjerg S. Carriage of penicillin-non-susceptible pneumococci among children in northern Tanzania in the 13-valent pneumococcal vaccine era. Int J Infect Dis 2019; 81:156-166. [PMID: 30685588 DOI: 10.1016/j.ijid.2019.01.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 01/18/2019] [Accepted: 01/19/2019] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVES To determine the antibiotic susceptibility and serotype distribution of colonizing Streptococcus pneumoniae in Tanzanian children. Serial cross-sectional surveys were performed following the national introduction of the 13-valent pneumococcal conjugate vaccine (PCV13) in December 2012. METHODS A total of 775 children less than 2 years of age were recruited at primary health centres in Moshi, Tanzania between 2013 and 2015, and samples were obtained from the nasopharynx. S. pneumoniae were isolated by culture and tested for antibiotic susceptibility by disc diffusion and E-test methods; molecular testing was used to determine serotype/group. RESULTS Penicillin non-susceptibility in the isolated pneumococci increased significantly from 31% (36/116) in 2013, to 47% (30/64) in 2014 and 53% (32/60) in 2015. Non-susceptibility to amoxicillin/ampicillin and ceftriaxone was low (n=8 and n=9, respectively), while 97% (236/244) of the isolates were non-susceptible to trimethoprim-sulfamethoxazole. The majority of the children (54%, n=418) had been treated with antibiotics in the past 3 months, and amoxicillin/ampicillin were overall the most commonly used antibiotics. Carriage of penicillin-non-susceptible pneumococci was more common in children with many siblings. The prevalence of PCV13 serotypes among the detected serotypes/groups decreased from 56% (40/71) in 2013 to 23% (13/56) in 2015. CONCLUSIONS Penicillin non-susceptibility in S. pneumoniae colonizing Tanzanian children increased during an observation period shortly after the introduction of PCV13. Measures to ensure rational use of antibiotics and more effective systems for surveillance of antibiotic resistance and serotype distribution are needed to assure continued effective treatment of pneumococcal disease.
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Affiliation(s)
- Matilda Emgård
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden; Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden.
| | - Sia E Msuya
- Institute of Public Health, Kilimanjaro Christian Medical University College (KCMUCo), Moshi, Tanzania; Department of Community Medicine, Kilimanjaro Christian Medical Centre (KCMC), Moshi, Tanzania
| | - Balthazar M Nyombi
- Institute of Public Health, Kilimanjaro Christian Medical University College (KCMUCo), Moshi, Tanzania; Department of Community Medicine, Kilimanjaro Christian Medical Centre (KCMC), Moshi, Tanzania
| | - Dominic Mosha
- Institute of Public Health, Kilimanjaro Christian Medical University College (KCMUCo), Moshi, Tanzania
| | - Lucia Gonzales-Siles
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Rickard Nordén
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Shadi Geravandi
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Victor Mosha
- Institute of Public Health, Kilimanjaro Christian Medical University College (KCMUCo), Moshi, Tanzania
| | - Josefine Blomqvist
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Sofie Franzén
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Fredrika Sahlgren
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Rune Andersson
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden; Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
| | - Susann Skovbjerg
- Department of Infectious Diseases, Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden; Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, Gothenburg, Sweden
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37
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Abstract
Streptococcus pneumoniae is one of the commonest bacteria that cause morbidity and mortality in children and the elderly. The two extremes of age and individuals with underlying disease are particularly at risk of developing pneumococcal disease. The pneumococcus is responsible for a wide range of infectious diseases, ranging from mild, non-invasive infections such as otitis media and sinusitis, to more severe infections including pneumonia, septicemia, and meningitis. Despite the licensure of highly effective pneumococcal conjugate vaccines, the control of pneumococcal disease is still challenging. Here we describe the critical role of Streptococcus pneumoniae in public health.
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Affiliation(s)
- Godwin Oligbu
- Paediatric Infectious Diseases Research Group, Institute for Infection and Immunity, St. George's, University of London, London, UK. .,Immunisation and Countermeasures Division, National Infection Service, Public Health England, London, UK.
| | - Norman K Fry
- Immunisation and Countermeasures Division, National Infection Service, Public Health England, London, UK.,Respiratory and Vaccine Preventable Bacterial Reference Unit (RVPBRU), National Infection Service Laboratories, Public Health England, London, UK
| | - Shamez N Ladhani
- Paediatric Infectious Diseases Research Group, Institute for Infection and Immunity, St. George's, University of London, London, UK.,Immunisation and Countermeasures Division, National Infection Service, Public Health England, London, UK
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38
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Krause PJ, Kavathas PB, Ruddle NH. Modeling Approaches Toward Understanding Infectious Disease Transmission. IMMUNOEPIDEMIOLOGY 2019. [PMCID: PMC7121152 DOI: 10.1007/978-3-030-25553-4_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Long-standing neglected diseases continue to challenge our global health infrastructure, and emerging pathogens pose new threats worldwide. To inform prevention and response efforts, mathematical models of infectious disease dynamics are being increasingly applied. Here we explain how models can be developed to enhance our understanding and predictive power over population-level disease trends, by capturing both fundamental aspects of transmission and also the effects of medical and behavioral interventions. We review advances in transdisciplinary approaches of disease modeling and illustrate these advances with applications including community-based initiatives undertaken during the Ebola epidemic in West Africa and age-targeting of influenza vaccination in the USA. We further discuss how modern statistical inference facilitates the incorporation of data from behavioral sciences and epidemiology into models, highlighting how data-driven models can constitute powerful tools to inform and improve public health strategies.
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Affiliation(s)
- Peter J. Krause
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health and Departments of Medicine and Pediatrics, Yale School of Medicine, New Haven, CT USA
| | - Paula B. Kavathas
- Departments of Laboratory Medicine and Immunobiology, Yale School of Medicine, New Haven, CT USA
| | - Nancy H. Ruddle
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT USA
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39
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Fenoll A, Ardanuy C, Liñares J, Cercenado E, Marco F, Fleites A, Rodríguez-Mayo M, López-Hontangas JL, Palop B, Aller AI, Buendía B, Méndez C, Cifuentes I. Serotypes and genotypes of S. pneumoniae isolates from adult invasive disease in Spain: A 5-year prospective surveillance after pediatric PCV13 licensure. The ODIN study. Vaccine 2018; 36:7993-8000. [PMID: 30449634 DOI: 10.1016/j.vaccine.2018.10.098] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/15/2018] [Accepted: 10/31/2018] [Indexed: 11/19/2022]
Abstract
Serotypes/genotypes causing invasive pneumococcal disease (IPD) in adults are determined by vaccination strategies. The aim of this study was to assess the epidemiology of IPD in adults (≥18 years) after PCV13 introduction for children: serotypes, clonal complexes, antibiotic non-susceptibility and clinical presentations. We performed a prospective, clinical surveillance of hospitalized culture-confirmed IPDs in adults in nine Spanish hospitals (August 2010-June 2015). A total of 1087 culture-confirmed IPD episodes were included, of which 772 (71.0%) had bacteremic pneumonia (401 complicated/371 uncomplicated pneumonia), 122 (11.2%) meningitis, 102 (9.4%) non-focal bacteremia, 34 (3.1%) peritonitis and 57 (5.3%) others. The most common serotypes were: 3 (12.7%), 19A (8.5%), 8 (7.7%), 7F (6.3%), 1 (4.2%), 6C (4.2%), 11A (4.2%), 22F (4.2%) and 14 (4.0%). Vaccine types (PCV13 + 6C) caused 49.8% of IPD episodes, with a significant decrease over the 5-year period, and significant decreases in serotypes 6C and 7F. The most common genotypes were: CC180 (8.4%), CC191 (6.0%), and CC53 (5.0%). Vaccine types caused 53.9% (414/768) pneumonia episodes and 58.9% (235/399) complicated pneumonia, 53.4% IPD in adults <50 years (143/268), and 54.7% IPD in immunocompetent patients (337/616). Overall non-susceptibility was 25.9% to penicillin (1.1% for parenteral criteria), 24.9% to erythromycin and 2.7% to levofloxacin. CONCLUSIONS: Although the percentage of vaccine-types causing IPDs in adults significantly decreased, it remained high. Associations of vaccine types with pneumonia (with complicated pneumonia for specific serotypes), and immunocompetent patients point to the burden of IPD caused by PCV13 serotypes.
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Affiliation(s)
- Asunción Fenoll
- Spanish Reference Laboratory for Pneumococci, Centro Nacional de Microbiología, Madrid, Spain
| | - Carmen Ardanuy
- Microbiology Department, Hospital Universitari de Bellvitge-IDIBELL, Barcelona, Spain; CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain.
| | - Josefina Liñares
- Microbiology Department, Hospital Universitari de Bellvitge-IDIBELL, Barcelona, Spain; CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain
| | - Emilia Cercenado
- CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain; Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - Francesc Marco
- Microbiology Department, Hospital Clínic, Barcelona, Spain; ISGlobal, Barcelona Ctr. Int. Health Res., Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
| | - Ana Fleites
- Microbiology Department, Hospital Universitario Central de Asturias, Oviedo, Spain
| | - María Rodríguez-Mayo
- Microbiology Department, Complejo Hospitalario Universitario A Coruña, A Coruña, Spain
| | | | - Begoña Palop
- Microbiology Department, Hospital Regional Universitario Carlos Haya, Malaga, Spain
| | - Ana-Isabel Aller
- Microbiology Department, H. Nuestra Señora de Valme, Sevilla, Spain
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40
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Hill AB, Beitelshees M, Nayerhoda R, Pfeifer BA, Jones CH. Engineering a Next-Generation Glycoconjugate-Like Streptococcus pneumoniae Vaccine. ACS Infect Dis 2018; 4:1553-1563. [PMID: 30180541 PMCID: PMC9930592 DOI: 10.1021/acsinfecdis.8b00100] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We detail the development of a next-generation Streptococcus pneumoniae liposomal encapsulation of polysaccharides (LEPS) vaccine, with design characteristics geared toward best-in-class efficacy. The first generation LEPS vaccine, which contained 20 encapsulated pneumococcal capsular polysaccharides (CPSs) and two surface-displayed virulence-associated proteins (GlpO and PncO), enabling prophylactic potency against 70+ serotypes of Streptococcus pneumoniae (the causative agent of pneumococcal disease), was rationally redesigned for advanced clinical readiness and best-in-class coverage. In doing so, the virulent-specific GlpO protein antigen was removed from the final formulation due to off-target immunogenicity toward bacterial species within the human microbiome, while directed protection was maintained by increasing the dose of PncO from 17 to 68 μg. LEPS formulation parameters also readily facilitated an increase in CPS valency (to a total of 24) and systematic variation in protein-liposome attachment mechanisms in anticipation of clinical translation. An additional safety assessment study demonstrated that LEPS does not exhibit appreciable toxicological effects even when administered at ten times the effective dose. In summary, this new design offers the broadest, safest, and most-complete protection while maintaining desirable glycoconjugate-like features, positioning the LEPS vaccine platform for clinical success and a global health impact.
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Affiliation(s)
- Andrew B. Hill
- Abcombi Biosciences Inc., 1576 Sweet Home Road, Amherst, New York 14228, United States,Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Marie Beitelshees
- Abcombi Biosciences Inc., 1576 Sweet Home Road, Amherst, New York 14228, United States,Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Roozbeh Nayerhoda
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Blaine A. Pfeifer
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States,Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States,Corresponding Authors: .,
| | - Charles H. Jones
- Abcombi Biosciences Inc., 1576 Sweet Home Road, Amherst, New York 14228, United States,Corresponding Authors: .,
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41
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Hiller NL, Sá-Leão R. Puzzling Over the Pneumococcal Pangenome. Front Microbiol 2018; 9:2580. [PMID: 30425695 PMCID: PMC6218428 DOI: 10.3389/fmicb.2018.02580] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 10/09/2018] [Indexed: 12/11/2022] Open
Abstract
The Gram positive bacterium Streptococcus pneumoniae (pneumococcus) is a major human pathogen. It is a common colonizer of the human host, and in the nasopharynx, sinus, and middle ear it survives as a biofilm. This mode of growth is optimal for multi-strain colonization and genetic exchange. Over the last decades, the far-reaching use of antibiotics and the widespread implementation of pneumococcal multivalent conjugate vaccines have posed considerable selective pressure on pneumococci. This scenario provides an exceptional opportunity to study the evolution of the pangenome of a clinically important bacterium, and has the potential to serve as a case study for other species. The goal of this review is to highlight key findings in the studies of pneumococcal genomic diversity and plasticity.
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Affiliation(s)
- N. Luisa Hiller
- Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, United States
- Center of Excellence in Biofilm Research, Allegheny Health Network, Pittsburgh, PA, United States
| | - Raquel Sá-Leão
- Laboratory of Molecular Microbiology of Human Pathogens, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Oeiras, Portugal
- Departamento de Biologia Vegetal, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
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42
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Dynamic transmission modelling to address infant pneumococcal conjugate vaccine schedule modifications in the UK. Epidemiol Infect 2018; 146:1797-1806. [PMID: 30012224 PMCID: PMC9506701 DOI: 10.1017/s095026881800198x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
AbstractThe 13-valent pneumococcal conjugate vaccine (PCV) has been part of routine immunisation in a 2 + 1 schedule (two primary infant doses and one booster during the second year of life) in the UK since 2010. Recently, the UK's Joint Committee on Vaccination and Immunisation recommended changing to a 1 + 1 schedule while conceding that this will increase disease burden; however, uncertainty remains on how much pneumococcal burden – including invasive pneumococcal disease (IPD) and non-invasive disease – will increase. We built a dynamic transmission model to investigate this question. The model predicted that a 1 + 1 schedule would incur 8777–27 807 additional cases of disease and 241–743 more deaths over 5 years. Serotype 19A caused 55–71% of incremental IPD cases. Scenario analyses showed that booster dose adherence, effectiveness against carriage and waning in a 1 + 1 schedule had the most influence on resurgence of disease. Based on the model assumptions, switching to a 1 + 1 schedule will substantially increase disease burden. The results likely are conservative since they are based on relatively low vaccine-type pneumococcal transmission, a paradigm that has been called into question by data demonstrating an increase of IPD due to several vaccine serotypes during the last surveillance year available.
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43
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Lewnard JA, Givon-Lavi N, Weinberger DM, Lipsitch M, Dagan R. Pan-serotype Reduction in Progression of Streptococcus pneumoniae to Otitis Media After Rollout of Pneumococcal Conjugate Vaccines. Clin Infect Dis 2018; 65:1853-1861. [PMID: 29020218 DOI: 10.1093/cid/cix673] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 07/28/2017] [Indexed: 01/10/2023] Open
Abstract
Background Reductions in otitis media (OM) burden following rollout of pneumococcal conjugate vaccines (PCVs) have exceeded predictions of vaccine impact. In settings with active surveillance, reductions in OM caused by vaccine-targeted pneumococcal serotypes have co-occurred with reductions in OM caused by other pathogens carried in the upper-respiratory tract of children. To understand these changes, we investigated the progression of vaccine-targeted and non-vaccine pneumococcal serotypes from carriage to OM before and after vaccine rollout. Methods Nasopharyngeal carriage prevalence of pneumococcus was monitored in prospective studies of Bedouin and Jewish children <3 years old in southern Israel between 2004 and 2016. Incidence of OM necessitating middle-ear fluid culture (predominantly complex OM including recurrent, spontaneously-draining, non-responsive, and chronic cases) was monitored via prospective, population-based active surveillance. We estimated rates of pneumococcal serotype-specific progression from carriage to disease before and after rollout of PCV7/13, measured as OM incidence per carrier. We pooled serotype-specific estimates using Bayesian random-effects models. Results On average, rates of progression declined 92% (95% credible interval: 79-97%) and 80% (46-93%) for PCV7/13 serotypes among Bedouin and Jewish children <12 months old, respectively, and 32% (-58-71%) and 61% (-5-86%) among children aged 12-35m. For non-vaccine serotypes, rates of progression among Bedouin and Jewish children aged <12m declined 74% (55-85%) and 43% (4-68%), respectively. Conclusions Vaccine-targeted and non-vaccine pneumococcal serotypes showed lower rates of progression to complex OM after rollout of PCV7/13. Early-life OM episodes historically associated with vaccine-serotype pneumococci may impact the susceptibility of children to OM progression.
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Affiliation(s)
- Joseph A Lewnard
- Center for Communicable Disease Dynamics, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Noga Givon-Lavi
- Pediatric Infectious Diseases Unit, Soroka University Medical Center.,Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Daniel M Weinberger
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut
| | - Marc Lipsitch
- Center for Communicable Disease Dynamics, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Ron Dagan
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
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44
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Balsells E, Dagan R, Yildirim I, Gounder PP, Steens A, Muñoz-Almagro C, Mameli C, Kandasamy R, Givon Lavi N, Daprai L, van der Ende A, Trzciński K, Nzenze SA, Meiring S, Foster D, Bulkow LR, Rudolph K, Valero-Rello A, Ducker S, Vestrheim DF, von Gottberg A, Pelton SI, Zuccotti G, Pollard AJ, Sanders EAM, Campbell H, Madhi SA, Nair H, Kyaw MH. The relative invasive disease potential of Streptococcus pneumoniae among children after PCV introduction: A systematic review and meta-analysis. J Infect 2018; 77:368-378. [PMID: 29964140 DOI: 10.1016/j.jinf.2018.06.004] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 04/24/2018] [Accepted: 06/11/2018] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Burden of pneumococcal disease depends on the prevalence and invasive disease potential of serotypes. We aimed to estimate the invasive disease potential of serotypes in children under 5 years of age by combining data from different settings with routine immunisation with pneumococcal conjugate vaccines (PCV). METHODS We conducted a systematic review, supplemented by unpublished data, to identify data on the frequency of pneumococcal serotypes in carriage and invasive pneumococcal disease (IPD). We estimated the invasive disease potential of serotypes as the ratio of IPD in relation to carriage (odds ratio and 95%CI) compared with 19A (reference serotype) by meta-analysis. We report results based on a random effects model for children aged 0-23, 24-29, and 0-59 months and by invasive clinical syndromes. RESULTS In comparison with 19A, serotypes 1, 7F, and 12F had a significantly higher invasive disease potential in children aged 0-23 and 0-59 months for all IPD and clinical syndromes (OR > 5). Several non-vaccine types (NVTs) (6C, 15A, 15BC, 16F, 23B, in these two age groups) had a lower invasive disease potential than 19A (OR 0.1-0.3). NVTs 8, 12F, 24F, and 33F were at the upper end of the invasiveness spectrum. CONCLUSIONS There is substantial variation among pneumococcal serotypes in their potential to cause IPD and disease presentation, which is influenced by age and time after PCV introduction. Surveillance of IPD and carriage is critical to understand the expected effectiveness of current PCVs (in the longer term) and guide the development of future vaccines.
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Affiliation(s)
- Evelyn Balsells
- Centre for Global Health Research, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Medical School, Teviot Place, Edinburgh, UK.
| | - Ron Dagan
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Inci Yildirim
- Division of Infectious Diseases, Department of Pediatrics, School of Medicine, Emory University, Atlanta, GA, USA; Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA; Center for Childhood Infections and Vaccines, Atlanta, GA, USA
| | - Prabhu P Gounder
- Arctic Investigations Program, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), US Centers for Disease Control and Prevention (CDC), Anchorage, AK, USA
| | - Anneke Steens
- Department of Vaccine Preventable Diseases, Norwegian Institute of Public Health, Oslo, Norway; Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Carmen Muñoz-Almagro
- Institut de Recerca Pediatrica, Departament de Microbiologia Molecular, Hospital Sant Joan de Deu, Barcelona, Spain; CIBER de Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain; School of Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Chiara Mameli
- Department of Pediatrics, V.Buzzi Children's Hospital, University of Milan, Milan, Italy
| | - Rama Kandasamy
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford and NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
| | - Noga Givon Lavi
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Laura Daprai
- Unit of Microbiology, Fondazione IRCCS Cá Granda Ospedale Maggiore Policlinico, Milano, Italy
| | - Arie van der Ende
- Academic Medical Center, Department of Medical Microbiology and the Netherlands Reference Laboratory for Bacterial Meningitis, Amsterdam, The Netherlands
| | - Krzysztof Trzciński
- Department of Pediatric Immunology and Infectious Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Susan A Nzenze
- Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, University of the Witwatersrand, Johannesburg, South Africa; Department of Science and Technology/National Research Foundation, Vaccine Preventable Diseases, University of the Witwatersrand, Johannesburg, South Africa
| | - Susan Meiring
- National Institute for Communicable Diseases: Division of the National Health Laboratory Service, Johannesburg, South Africa
| | - Dona Foster
- NIHR Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Lisa R Bulkow
- Arctic Investigations Program, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), US Centers for Disease Control and Prevention (CDC), Anchorage, AK, USA
| | - Karen Rudolph
- Arctic Investigations Program, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), US Centers for Disease Control and Prevention (CDC), Anchorage, AK, USA
| | - Ana Valero-Rello
- Institut de Recerca Pediatrica, Departament de Microbiologia Molecular, Hospital Sant Joan de Deu, Barcelona, Spain; CIBER de Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Struan Ducker
- Centre for Global Health Research, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Medical School, Teviot Place, Edinburgh, UK
| | | | - Anne von Gottberg
- National Institute for Communicable Diseases: Division of the National Health Laboratory Service, Johannesburg, South Africa; School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Stephen I Pelton
- Department of Pediatrics, Boston Medical Center, Boston, MA, USA
| | - GianVincenzo Zuccotti
- Department of Pediatrics, V.Buzzi Children's Hospital, University of Milan, Milan, Italy
| | - Andrew J Pollard
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford and NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom
| | - Elisabeth A M Sanders
- Department of Pediatric Immunology and Infectious Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands; The National Institute for Public Health and The Environment, Bilthoven, The Netherlands
| | - Harry Campbell
- Centre for Global Health Research, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Medical School, Teviot Place, Edinburgh, UK
| | - Shabir A Madhi
- Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, University of the Witwatersrand, Johannesburg, South Africa; National Institute for Communicable Diseases: Division of the National Health Laboratory Service, Johannesburg, South Africa; Department of Science and Technology/National Research Foundation, Vaccine Preventable Diseases, University of the Witwatersrand, Johannesburg, South Africa
| | - Harish Nair
- Centre for Global Health Research, Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Medical School, Teviot Place, Edinburgh, UK; Public Health Foundation of India, New Delhi, India
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Adebanjo T, Lessa FC, Mucavele H, Moiane B, Chauque A, Pimenta F, Massora S, Carvalho MDG, Whitney CG, Sigauque B. Pneumococcal carriage and serotype distribution among children with and without pneumonia in Mozambique, 2014-2016. PLoS One 2018; 13:e0199363. [PMID: 29944695 PMCID: PMC6019677 DOI: 10.1371/journal.pone.0199363] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 06/06/2018] [Indexed: 11/15/2022] Open
Abstract
Background Pneumococcal colonization is a precursor to pneumonia, and pneumococcal conjugate vaccines (PCV) can decrease vaccine-type (VT) colonization. Pneumococcal colonization studies are traditionally done among healthy children in the community; however, VT colonization prevalence may differ between these children and those with pneumonia. We assessed overall and VT pneumococcal colonization and factors associated with colonization among children with and without pneumonia after Mozambique introduced 10-valent PCV (PCV10) in 2013. Methods We used data from ongoing pneumonia surveillance in children aged <5 years and from cross-sectional nasopharyngeal colonization surveys conducted in October 2014 –April 2015 and October 2015 –May 2016. Pneumonia was defined using WHO standard criteria for radiologically confirmed pneumonia. Children with pneumonia enrolled from January 2014 –April 2016 were compared to children without pneumonia enrolled from the cross-sectional surveys. Clinical data and nasopharyngeal (NP) swabs were collected from each child. NP specimens were cultured for pneumococci, and culture-negative specimens from children with pneumonia underwent polymerase chain reaction (PCR). Results Of 778 and 927 children with and without pneumonia, 97.4% and 27.0% were exposed to antibiotics before swab collection, respectively. Based on culture, pneumococcal colonization was 45.1% for children with and 84.5% for children without pneumonia (P<0.001); VT pneumococcal colonization was 18.6% for children with and 23.4% for children without pneumonia (P = 0.02). The addition of PCR in children with pneumonia increased overall and VT-pneumococcal colonization to 79.2% and 31.1%, respectively. In multivariable analysis including PCR results, pneumonia was associated with VT pneumococcal colonization (adjusted OR: 1.4, 95%CI: 1.10–1.78). Conclusion Vaccine-type pneumococcal colonization remains common among children with and without pneumonia post-PCV10 introduction in Mozambique. In a population of children with high antibiotic exposure, the use of PCR for culture-negative NP swabs can improve assessment of pneumococcal colonization and circulating serotypes.
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Affiliation(s)
- Tolulope Adebanjo
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, GA, United States of America
- Respiratory Diseases Branch, Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, United States of America
- * E-mail:
| | - Fernanda C. Lessa
- Respiratory Diseases Branch, Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, United States of America
| | - Helio Mucavele
- Fundação Manhiça, Centro de Investigação em Saúde da Manhiça (CISM), Maputo, Moçambique
| | - Benild Moiane
- Fundação Manhiça, Centro de Investigação em Saúde da Manhiça (CISM), Maputo, Moçambique
| | - Alberto Chauque
- Fundação Manhiça, Centro de Investigação em Saúde da Manhiça (CISM), Maputo, Moçambique
| | - Fabiana Pimenta
- Respiratory Diseases Branch, Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, United States of America
| | - Sergio Massora
- Fundação Manhiça, Centro de Investigação em Saúde da Manhiça (CISM), Maputo, Moçambique
| | - Maria da Gloria Carvalho
- Respiratory Diseases Branch, Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, United States of America
| | - Cynthia G. Whitney
- Respiratory Diseases Branch, Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, United States of America
| | - Betuel Sigauque
- Fundação Manhiça, Centro de Investigação em Saúde da Manhiça (CISM), Maputo, Moçambique
- John Snow Inc. (JSI) on the Maternal and Child Survival Program–MCSP (USAID Grantee), Maputo, Moçambique
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Southern J, Andrews N, Sandu P, Sheppard CL, Waight PA, Fry NK, Van Hoek AJ, Miller E. Pneumococcal carriage in children and their household contacts six years after introduction of the 13-valent pneumococcal conjugate vaccine in England. PLoS One 2018; 13:e0195799. [PMID: 29799839 PMCID: PMC5969732 DOI: 10.1371/journal.pone.0195799] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 03/29/2018] [Indexed: 12/14/2022] Open
Abstract
Background In April 2010, 13-valent pneumococcal conjugate vaccine (PCV13) replaced PCV7 in the infant immunisation schedule in England and Wales. Despite limited serotype replacement in invasive pneumococcal disease (IPD) during the first four post-PCV13 years, non-vaccine type (NVT) IPD increased substantially in 2014/15. We undertook a carriage study in 2015/16 to help understand the reasons for this increase. Methods and findings Families with a child aged <5 years attending a participating general practice in Gloucestershire or Hertfordshire were invited to provide nasopharyngeal swabs from all consenting members. Swabs from 650 individuals (293 under five, 73 five to twenty and 284 >twenty years) were cultured and serotyped for Streptococcus pneumoniae. Results were compared with those from three previous household studies conducted in the same populations between 2001 to 2013, and with the serotypes causing IPD to estimate case-carrier ratios (CCRs). Overall carriage prevalence did not differ between the four carriage studies with reductions in vaccine-type carriage offset by increases in NVT carriage. While no individual NVT serotype showed an increase in CCR from 2012/13, the composition of the serotypes comprising the NVT group differed such that the overall CCR of the NVT group had significantly increased since 2012/13. Carriage of two PCV13 serotypes, 3 and 19A, was found in 2015/16 (3/650 = 0.5% and 2/650 = 0.3% respectively) with no overall reduction in carriage prevalence of PCV13-7 serotypes since 2012/13, though 6C prevalence, a vaccine-related serotype, had reduced from 1.8% in 2012/13 to 2/648 (0.3%) in 2015/16, p = 0.013. Conclusions There was continuing evolution in carried NVTs six years after PCV13 introduction which, in addition to being vaccine-driven, could also reflect natural secular changes in certain NVTs. This poses challenges in predicting future trends in IPD. Elimination of carriage and disease due to serotypes 3 and 19A may not be achieved by PCV13.
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Affiliation(s)
- Jo Southern
- Immunisation, Hepatitis and Blood Safety Department, National Infection Service, Public Health England, London, United Kingdom
- * E-mail:
| | - Nick Andrews
- Statistics, Modelling and Economics Department, Colindale, National Infection Service, Public Health England, London, United Kingdom
| | - Pamela Sandu
- Respiratory and Vaccine Preventable Bacteria Reference Unit, National Infection Service, Public Health England, London, United Kingdom
| | - Carmen L. Sheppard
- Respiratory and Vaccine Preventable Bacteria Reference Unit, National Infection Service, Public Health England, London, United Kingdom
| | - Pauline A. Waight
- Immunisation, Hepatitis and Blood Safety Department, National Infection Service, Public Health England, London, United Kingdom
| | - Norman K. Fry
- Respiratory and Vaccine Preventable Bacteria Reference Unit, National Infection Service, Public Health England, London, United Kingdom
| | - Albert Jan Van Hoek
- Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Elizabeth Miller
- Immunisation, Hepatitis and Blood Safety Department, National Infection Service, Public Health England, London, United Kingdom
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Pneumococcal Phenotype and Interaction with Nontypeable Haemophilus influenzae as Determinants of Otitis Media Progression. Infect Immun 2018; 86:IAI.00727-17. [PMID: 29378791 DOI: 10.1128/iai.00727-17] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/19/2018] [Indexed: 02/03/2023] Open
Abstract
All-cause otitis media (OM) incidence has declined in numerous settings following introduction of pneumococcal conjugate vaccines (PCVs) despite increases in carriage of nonvaccine pneumococcal serotypes escaping immune pressure. To understand the basis for the declining incidence, we assessed the intrinsic capacity of pneumococcal serotypes to cause OM independently and in polymicrobial infections involving nontypeable Haemophilus influenzae (NTHi) using samples obtained from middle ear fluid and nasopharyngeal cultures before PCV7/13 rollout. Data included samples from OM episodes (11,811) submitted for cultures during a 10-year prospective study in southern Israel and nasopharyngeal samples (1,588) from unvaccinated asymptomatic children in the same population. We compared data representing pneumococcal serotype diversity across carriage and disease isolates with and without NTHi coisolation. We also measured associations between the pneumococcal phenotype and the rate of progression from colonization to OM in the presence and absence of NTHi. Whereas pneumococcal serotype diversity was lower in single-species OM than in single-species colonization, levels of serotype diversity did not differ significantly between colonization and OM in mixed-species episodes. Serotypes differed roughly 100-fold in progression rates, and those differences were attenuated in polymicrobial episodes. Vaccine serotype pneumococci had higher rates of progression than nonvaccine serotypes. While serotype invasiveness was a weak predictor of the OM progression rate, efficient capsular metabolic properties-traditionally thought to serve as an advantage in colonization-predicted an enhanced rate of progression to complex OM. The lower capacity of nonvaccine serotypes to cause OM may partially account for reductions in all-cause OM incidence despite serotype replacement in carriage following rollout of PCVs.
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Ganaie F, Nagaraj G, Govindan V, Basha R, Hussain M, Ashraf N, Ahmed S, Ravi Kumar K. Impact of Hajj on the S. pneumoniae carriage among Indian pilgrims during 2016- a longitudinal molecular surveillance study. Travel Med Infect Dis 2018; 23:64-71. [DOI: 10.1016/j.tmaid.2018.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 03/21/2018] [Accepted: 04/02/2018] [Indexed: 12/27/2022]
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Voysey M, Pollard AJ, Perera R, Shrestha S, Thorson S, Fanshawe TR. Use of weighted multivariate estimates in trials of multi-serotype vaccines to simplify interpretation of treatment differences. PLoS One 2018; 13:e0196200. [PMID: 29702658 PMCID: PMC5922548 DOI: 10.1371/journal.pone.0196200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 04/07/2018] [Indexed: 11/19/2022] Open
Abstract
Background Many vaccines contain multiple components. Licensed pneumococcal conjugate vaccines (PCV) contain polysaccharides from 7, 10, or 13 different serotypes of Streptococcus pneumoniae. The main outcomes in randomised trials of pneumococcal vaccines are serotype-specific antibody measures. Comparisons are made between groups for each serotype, resulting in multiple separate comparisons of treatment effects which can be complicated to interpret. We investigated methods for computing the overall difference between vaccine groups across all serotypes. Methods Pneumococcal antibody concentrations were obtained from a randomised controlled trial of ten-valent pneumococcal vaccine, conducted in Kathmandu, Nepal. Infants received either 2 priming doses of vaccine at 6 and 14 weeks of age followed by a booster (2+1), or 3 priming doses at 6, 10, and 14 weeks of age with no booster (3+0). The overall difference between vaccine schedules across all serotypes was computed at each visit using a multivariate linear model with equal weights for each serotype. Alternative weights were derived from invasive pneumococcal disease cases in Nepal, Bangladesh and Pakistan, and from estimates of the relative invasiveness of each serotype and used in sensitivity analyses. Results When 10 separate estimates of treatment differences were computed the ratio of antibody responses for each serotype in the 2+1 group compared with the 3+0 group at 10 months of age varied greatly, with serotype-specific GMRs ranging from 2.80 for serotype 14, to 9.14 for serotype 18C. Using equal weights for each serotype, the overall geometric mean ratio (GMR) was 5.02 (95% CI 4.06−6.22) at 10 months of age, and 1.46 (95% CI 1.14−1.88) at 3 years of age. Using weights based on disease incidence gave GMRs ranging from 5.15 to 6.63 at 10 months of age, and 1.47 to 1.78 at 3 years of age. Using weights based on relative invasiveness gave estimates of 6.81 and 1.59, at 10 months and 3 years respectively. Conclusion PCV clinical trial data have a multivariate structure with correlated outcomes for different serotypes. When analysing each serotype separately, the multiple estimates of the treatment effect can complicate the interpretation of trial results. Reporting a single overall estimate which accounts for the correlation between outcomes can simplify such interpretation. Treatment effects can be weighted equally or alternative weights derived from independent data can be used. Many modern vaccines have multiple components, such as quadrivalent meningococcal group ACWY vaccine or four-component group B meningococcal vaccine, thus these methods are widely applicable.
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Affiliation(s)
- Merryn Voysey
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- * E-mail:
| | - Andrew J. Pollard
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- National Institute for Health Research Oxford Biomedical Research Centre, Oxford, United Kingdom
| | - Rafael Perera
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
| | - Shrijana Shrestha
- Paediatric Research Unit, Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Stephen Thorson
- Paediatric Research Unit, Patan Academy of Health Sciences, Kathmandu, Nepal
| | - Thomas R. Fanshawe
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
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Hakansson AP, Orihuela CJ, Bogaert D. Bacterial-Host Interactions: Physiology and Pathophysiology of Respiratory Infection. Physiol Rev 2018; 98:781-811. [PMID: 29488821 PMCID: PMC5966719 DOI: 10.1152/physrev.00040.2016] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 09/08/2017] [Accepted: 09/11/2017] [Indexed: 02/06/2023] Open
Abstract
It has long been thought that respiratory infections are the direct result of acquisition of pathogenic viruses or bacteria, followed by their overgrowth, dissemination, and in some instances tissue invasion. In the last decades, it has become apparent that in contrast to this classical view, the majority of microorganisms associated with respiratory infections and inflammation are actually common members of the respiratory ecosystem and only in rare circumstances do they cause disease. This suggests that a complex interplay between host, environment, and properties of colonizing microorganisms together determines disease development and its severity. To understand the pathophysiological processes that underlie respiratory infectious diseases, it is therefore necessary to understand the host-bacterial interactions occurring at mucosal surfaces, along with the microbes inhabiting them, during symbiosis. Current knowledge regarding host-bacterial interactions during asymptomatic colonization will be discussed, including a plausible role for the human microbiome in maintaining a healthy state. With this as a starting point, we will discuss possible disruptive factors contributing to dysbiosis, which is likely to be a key trigger for pathobionts in the development and pathophysiology of respiratory diseases. Finally, from this renewed perspective, we will reflect on current and potential new approaches for treatment in the future.
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Affiliation(s)
- A P Hakansson
- Division of Experimental Infection Medicine, Department of Translational Medicine, Lund University , Lund , Sweden ; Department of Microbiology, University of Alabama at Birmingham , Birmingham, Alabama ; and Center for Inflammation Research, Queens Medical Research Institute, University of Edinburgh , Edinburgh , United Kingdom
| | - C J Orihuela
- Division of Experimental Infection Medicine, Department of Translational Medicine, Lund University , Lund , Sweden ; Department of Microbiology, University of Alabama at Birmingham , Birmingham, Alabama ; and Center for Inflammation Research, Queens Medical Research Institute, University of Edinburgh , Edinburgh , United Kingdom
| | - D Bogaert
- Division of Experimental Infection Medicine, Department of Translational Medicine, Lund University , Lund , Sweden ; Department of Microbiology, University of Alabama at Birmingham , Birmingham, Alabama ; and Center for Inflammation Research, Queens Medical Research Institute, University of Edinburgh , Edinburgh , United Kingdom
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