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Weehuizen JM, van Roeden SE, Hogewoning SJ, van der Hoek W, Bonten MJM, Hoepelman AIM, Bleeker-Rovers CP, Wever PC, Oosterheert JJ. No increased risk of mature B-cell non-Hodgkin lymphoma after Q fever detected: results from a 16-year ecological analysis of the Dutch population incorporating the 2007-2010 Q fever outbreak. Int J Epidemiol 2022; 51:1481-1488. [PMID: 35352121 PMCID: PMC9557853 DOI: 10.1093/ije/dyac053] [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: 06/25/2021] [Accepted: 03/11/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND A causative role of Coxiella burnetii (the causative agent of Q fever) in the pathogenesis of B-cell non-Hodgkin lymphoma (NHL) has been suggested, although supporting studies show conflicting evidence. We assessed whether this association is present by performing a detailed analysis on the risk of mature B-cell NHL after Q fever during and after the largest Q fever outbreak reported worldwide in the entire Dutch population over a 16-year period. METHODS We performed an ecological analysis. The incidence of mature B-cell NHL in the entire Dutch population from 2002 until 2017 was studied and modelled with reported acute Q fever cases as the determinant. The adjusted relative risk of NHL after acute Q fever as the primary outcome measure was calculated using a Poisson regression. RESULTS Between January 2002 and December 2017, 266 050 745 person-years were observed, with 61 424 diagnosed with mature B-cell NHL. In total, 4310 persons were diagnosed with acute Q fever, with the highest incidence in 2009. The adjusted relative risk of NHL after acute Q fever was 1.02 (95% CI 0.97-1.06, P = 0.49) and 0.98 (95% CI 0.89-1.07, P = 0.60), 0.99 (95% CI 0.87-1.12, P = 0.85) and 0.98 (95% 0.88-1.08, P = 0.67) for subgroups of diffuse large B-cell lymphoma, follicular lymphoma or B-cell chronic lymphocytic leukaemia, respectively. Modelling with lag times (1-4 years) did not change interpretation. CONCLUSION We found no evidence for an association between C. burnetii and NHL after studying the risk of mature B-cell NHL after a large Q fever outbreak in Netherlands.
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Affiliation(s)
- Jesper M Weehuizen
- Department of Internal Medicine and Infectious Diseases, University Medical Centre Utrecht and Utrecht University, Utrecht, Netherlands
| | - Sonja E van Roeden
- Department of Internal Medicine and Infectious Diseases, University Medical Centre Utrecht and Utrecht University, Utrecht, Netherlands
| | | | - Wim van der Hoek
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands
| | - Marc J M Bonten
- Department of Medical Microbiology, University Medical Centre Utrecht and Utrecht University, Utrecht, Netherlands
| | - Andy I M Hoepelman
- Department of Internal Medicine and Infectious Diseases, University Medical Centre Utrecht and Utrecht University, Utrecht, Netherlands
| | - Chantal P Bleeker-Rovers
- Department of Internal Medicine and Infectious Diseases, Radboud University Medical Centre and Radboud Expertise Centre for Q fever, Nijmegen, Netherlands
| | - Peter C Wever
- Department of Medical Microbiology and Infection Control, Jeroen Bosch Hospital, 's-Hertogenbosch, Netherlands
| | - Jan Jelrik Oosterheert
- Department of Internal Medicine and Infectious Diseases, University Medical Centre Utrecht and Utrecht University, Utrecht, Netherlands
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Research Trends and Hotspots of Q Fever Research: A Bibliometric Analysis 1990-2019. BIOMED RESEARCH INTERNATIONAL 2022; 2022:9324471. [PMID: 35075431 PMCID: PMC8783702 DOI: 10.1155/2022/9324471] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 12/18/2021] [Indexed: 11/17/2022]
Abstract
Q fever is a worldwide distributed zoonosis caused by Coxiella burnetii, a Gram-negative bacterium. Despite existence of large amount of research data on the developments related to Q fever, no bibliometric analysis of this subject is available to our knowledge. Bibliometric studies are an essential resource to track scholarly trends and research output in a subject. This study is aimed at reporting a bibliometric analysis of publications related to Q fever (2,840 articles published in the period 1990-2019) retrieved from Science Citation Index Expanded, an online database of Clarivate Analytics Web of Science Core Collection. Data was retrieved using keywords “Q fever” or “Coxiella burnetii” in title, abstract, and author keywords to describe important research indicators such as the kind and language of articles, the most important publications, research journals and categories, authors, institutions, and the countries having the most significant contribution to this subject. Finally, the emerging areas in field of diagnosis, host range, and clinical presentation were identified. Word cluster analysis of research related to Q fever revealed that major focus of research has been on zoonosis, seroprevalence, laboratory diagnosis (mainly using ELISA and PCR), clinical manifestations (abortion and endocarditis), vectors (ticks), and hosts (sheep, goat, and cattle). This bibliometric study is intended to visualize the existing research landscape and future trends in Q fever to assist in future knowledge exchange and research collaborations.
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Jaubert J, Atiana L, Larrieu S, De Vos P, Somon-Payet C, Porcherat S, Mboussou Y, Naze F, Picot S, Boukerrou M, Robillard PY, Gérardin P. Q fever seroprevalence in parturient women: the EQRUN cross-sectional study on Reunion Island. BMC Infect Dis 2020; 20:261. [PMID: 32245372 PMCID: PMC7118902 DOI: 10.1186/s12879-020-04969-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 03/12/2020] [Indexed: 11/30/2022] Open
Abstract
Background Q fever (Coxiella burnetii infection) has been associated with adverse perinatal outcomes. After investigating the obstetrical importance of Q fever on Reunion island and demonstrating an association between incident Q fever and miscarriage, we conducted a cross-sectional serosurvey to assess the prevalence of Coxiella burnetii infection among parturient women. Methods Between January 9 and July 24, 2014, within the level-4 maternity of Saint Pierre hospital and the level-1 maternity of Le Tampon, we proposed to screen all parturient women for Coxiella burnetii serology. Seropositivity was defined using indirect immunofluorescence for a dilution of phase 2 IgG titre ≥1:64. Further dilutions were chosen to discriminate recent or active infections from past or prevalent infections (< 1:128) and classify these as either possible (1:128), or probable (≥1:256). Recurrent miscarriage, stillbirth, preterm birth, small-for-gestational as well as a composite outcome of these adverse pregnancy outcomes were compared according to seropositivity using bivariate analysis or propensity score matching of seropositive and seronegative women on confounding factors. Results Among 1112 parturient women screened for Q fever over this 7-month period, 203 (18.3%) were seropositive. Overall weighted seroprevalence was of 20.1% (95%CI, 17.7–22.5%). Weighted seroprevalence of probable infections was 4.7% (95%CI 3.4–5.9%), while > 90% of positive serologies corresponded to past infections or false positives. Seropositivity was associated with none of the abovementioned adverse perinatal outcomes, whether in unpaired or matched analyses on propensity score. Conclusion The magnitude and the pattern of seroprevalence suggest that Q fever is endemic on Reunion island. In this context, we found no significant contribution of prevalent Coxiella burnetii infection to adverse pregnancy outcomes. Although reassuring, these data put in our endemic context, with a previously demonstrated increased risk of incident Q fever associated miscarriage, encourage us to protect pregnant women against the risk of new infection, periconceptional or early in pregnancy.
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Affiliation(s)
- Julien Jaubert
- Laboratoire de Bactériologie, Virologie et Parasitologie, Centre Hospitalier Universitaire (CHU) de la Réunion, Saint Pierre, Reunion, France
| | - Laura Atiana
- Laboratoire de Bactériologie, Virologie et Parasitologie, Centre Hospitalier Universitaire (CHU) de la Réunion, Saint Pierre, Reunion, France
| | - Sophie Larrieu
- CIRE Océan Indien, Santé Publique France, French National Public Health Agency, Saint Denis, Reunion, France
| | | | - Claudine Somon-Payet
- Maternité, Pôle Femme Mère Enfant, CHU de la Réunion, St Pierre, Reunion, France
| | - Sylvaine Porcherat
- INSERM CIC 1410 Epidémiologie Clinique, Centre Hospitalier Universitaire, Groupe Hospitalier Sud Réunion, CHU Réunion, BP 350, 97448, Saint Pierre, Cedex-Reunion, France
| | - Yoan Mboussou
- Laboratoire de Bactériologie, Virologie et Parasitologie, Centre Hospitalier Universitaire (CHU) de la Réunion, Saint Pierre, Reunion, France
| | - Florence Naze
- Laboratoire de Bactériologie, Virologie et Parasitologie, Centre Hospitalier Universitaire (CHU) de la Réunion, Saint Pierre, Reunion, France
| | - Sandrine Picot
- Laboratoire de Bactériologie, Virologie et Parasitologie, Centre Hospitalier Universitaire (CHU) de la Réunion, Saint Pierre, Reunion, France
| | - Malik Boukerrou
- Maternité, Pôle Femme Mère Enfant, CHU de la Réunion, St Pierre, Reunion, France.,CEPOI-EA7388, Pôle Femme Mère Enfant, CHU de la Réunion, Saint Pierre, Reunion, France
| | - Pierre-Yves Robillard
- Maternité, Pôle Femme Mère Enfant, CHU de la Réunion, St Pierre, Reunion, France.,CEPOI-EA7388, Pôle Femme Mère Enfant, CHU de la Réunion, Saint Pierre, Reunion, France
| | - Patrick Gérardin
- INSERM CIC 1410 Epidémiologie Clinique, Centre Hospitalier Universitaire, Groupe Hospitalier Sud Réunion, CHU Réunion, BP 350, 97448, Saint Pierre, Cedex-Reunion, France. .,UM 134 PIMIT Processus Infectieux en Milieu Insulaire Tropical, Université de La Réunion, INSERM 1187, CNRS 9192, IRD 249, CYROI, Sainte Clotilde, Reunion, France.
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