1
|
van Gorkom T, Voet W, Sankatsing SUC, Nijhuis CDM, Ter Haak E, Kremer K, Thijsen SFT. Prospective comparison of two enzyme-linked immunosorbent spot assays for the diagnosis of Lyme neuroborreliosis. Clin Exp Immunol 2020; 199:337-356. [PMID: 31665540 PMCID: PMC7008225 DOI: 10.1111/cei.13393] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2019] [Indexed: 11/08/2022] Open
Abstract
Commercial cellular tests are used to diagnose Lyme borreliosis (LB), but studies on their clinical validation are lacking. This study evaluated the utility of an in‐house and a commercial enzyme‐linked immunosorbent spot (ELISpot) assay for the diagnosis of Lyme neuroborreliosis (LNB). Prospectively, peripheral blood mononuclear cells (PBMCs) were isolated from patients and controls and analysed using an in‐house Borrelia ELISpot assay and the commercial LymeSpot assay. B. burgdorferi B31 whole cell lysate and a mixture of outer surface proteins were used to stimulate the PBMCs and the numbers of interferon‐gamma‐secreting T cells were measured. Results were evaluated using receiver operating characteristic (ROC) curve analysis. Eighteen active and 12 treated LNB patients, 10 healthy individuals treated for an early (mostly cutaneous) manifestation of LB in the past and 47 untreated healthy individuals were included. Both assays showed a poor diagnostic performance with sensitivities, specificities, positive and negative predictive values ranging from 44.4–66.7%, 42.0–72.5%, 21.8–33.3% and 80.5–87.0%, respectively. The LymeSpot assay performed equally poorly when the calculation method of the manufacturer was used. Both the in‐house and the LymeSpot assay are unable to diagnose active LNB or to monitor antibiotic treatment success.
Collapse
Affiliation(s)
- T van Gorkom
- Department of Medical Microbiology and Immunology, Diakonessenhuis Hospital, Utrecht, the Netherlands.,Centre for Infectious Diseases Research, Diagnostics and Laboratory Surveillance, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - W Voet
- Department of Neurology, Diakonessenhuis Hospital, Utrecht, the Netherlands
| | - S U C Sankatsing
- Department of Internal Medicine, Diakonessenhuis Hospital, Utrecht, the Netherlands
| | - C D M Nijhuis
- Centre for Infectious Diseases Research, Diagnostics and Laboratory Surveillance, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - E Ter Haak
- Centre for Infectious Diseases Research, Diagnostics and Laboratory Surveillance, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - K Kremer
- Centre for Infectious Diseases Research, Diagnostics and Laboratory Surveillance, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - S F T Thijsen
- Department of Medical Microbiology and Immunology, Diakonessenhuis Hospital, Utrecht, the Netherlands
| |
Collapse
|
2
|
Bamm VV, Ko JT, Mainprize IL, Sanderson VP, Wills MKB. Lyme Disease Frontiers: Reconciling Borrelia Biology and Clinical Conundrums. Pathogens 2019; 8:E299. [PMID: 31888245 PMCID: PMC6963551 DOI: 10.3390/pathogens8040299] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/06/2019] [Accepted: 12/12/2019] [Indexed: 12/18/2022] Open
Abstract
Lyme disease is a complex tick-borne zoonosis that poses an escalating public health threat in several parts of the world, despite sophisticated healthcare infrastructure and decades of effort to address the problem. Concepts like the true burden of the illness, from incidence rates to longstanding consequences of infection, and optimal case management, also remain shrouded in controversy. At the heart of this multidisciplinary issue are the causative spirochetal pathogens belonging to the Borrelia Lyme complex. Their unusual physiology and versatile lifestyle have challenged microbiologists, and may also hold the key to unlocking mysteries of the disease. The goal of this review is therefore to integrate established and emerging concepts of Borrelia biology and pathogenesis, and position them in the broader context of biomedical research and clinical practice. We begin by considering the conventions around diagnosing and characterizing Lyme disease that have served as a conceptual framework for the discipline. We then explore virulence from the perspective of both host (genetic and environmental predispositions) and pathogen (serotypes, dissemination, and immune modulation), as well as considering antimicrobial strategies (lab methodology, resistance, persistence, and clinical application), and borrelial adaptations of hypothesized medical significance (phenotypic plasticity or pleomorphy).
Collapse
Affiliation(s)
| | | | | | | | - Melanie K. B. Wills
- G. Magnotta Lyme Disease Research Lab, Molecular and Cellular Biology, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; (V.V.B.); (J.T.K.); (I.L.M.); (V.P.S.)
| |
Collapse
|
3
|
Mysterud A, Heylen DJA, Matthysen E, Garcia AL, Jore S, Viljugrein H. Lyme neuroborreliosis and bird populations in northern Europe. Proc Biol Sci 2019; 286:20190759. [PMID: 31138073 DOI: 10.1098/rspb.2019.0759] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Many vector-borne diseases are transmitted through complex pathogen-vector-host networks, which makes it challenging to identify the role of specific host groups in disease emergence. Lyme borreliosis in humans is now the most common vector-borne zoonosis in the Northern Hemisphere. The disease is caused by multiple genospecies of Borrelia burgdorferi sensu lato bacteria transmitted by ixodid (hard) ticks, and the major host groups transmit Borrelia genospecies with different pathogenicity, causing variable clinical symptoms in humans. The health impact of a given host group is a function of the number of ticks it infects as well as the pathogenicity of the genospecies it carries. Borrelia afzelii, with mainly small mammals as reservoirs, is the most common pathogen causing Lyme borreliosis, and it is often responsible for the largest proportion of infected host-seeking tick nymphs in Europe. The bird-borne Borrelia garinii, though less prevalent in nymphal ticks, is more likely to cause Lyme neuroborreliosis, but whether B. garinii causes disseminated disease more frequently has not been documented. Based on extensive data of annual disease incidence across Norway from 1995 to 2017, we show here that 69% of disseminated Lyme borreliosis cases were neuroborreliosis, which is three times higher than predicted from the infection prevalence of B. garinii in host-seeking ticks (21%). The population estimate of migratory birds, mainly of thrushes, explained part of the annual variation in cases of neuroborreliosis, with a one-year time lag. We highlight the important role of the genospecies' pathogenicity and the host associations for understanding the epidemiology of disseminated Lyme borreliosis.
Collapse
Affiliation(s)
- Atle Mysterud
- 1 Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo , PO Box 1066, Blindern, 0316 Oslo , Norway.,2 Evolutionary Ecology Group, Department of Biology, University of Antwerp , Universiteitsplein 1, 2610 Wilrijk , Belgium
| | - Dieter J A Heylen
- 3 Interuniversity Institute for Biostatistics and Statistical Bioinformatics, Hasselt University , Diepenbeek , Belgium.,4 Department of Ecology and Evolutionary Biology, Princeton University , Princeton, NJ , USA
| | - Erik Matthysen
- 2 Evolutionary Ecology Group, Department of Biology, University of Antwerp , Universiteitsplein 1, 2610 Wilrijk , Belgium
| | | | - Solveig Jore
- 6 Department of Food, Water, Zoonotic and Vector-borne Infections, The Norwegian Public Health Institute , PO Box 4404, Nydalen, 0403 Oslo , Norway
| | - Hildegunn Viljugrein
- 1 Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo , PO Box 1066, Blindern, 0316 Oslo , Norway.,7 Norwegian Veterinary Institute , PO Box 750, Sentrum, 0106 Oslo , Norway
| |
Collapse
|
4
|
Klemola T, Sormunen JJ, Mojzer J, Mäkelä S, Vesterinen EJ. High tick abundance and diversity of tick-borne pathogens in a Finnish city. Urban Ecosyst 2019. [DOI: 10.1007/s11252-019-00854-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
5
|
Geebelen L, Van Cauteren D, Devleesschauwer B, Moreels S, Tersago K, Van Oyen H, Speybroeck N, Lernout T. Combining primary care surveillance and a meta-analysis to estimate the incidence of the clinical manifestations of Lyme borreliosis in Belgium, 2015–2017. Ticks Tick Borne Dis 2019; 10:598-605. [DOI: 10.1016/j.ttbdis.2018.12.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 11/22/2018] [Accepted: 12/23/2018] [Indexed: 02/07/2023]
|
6
|
Genospecies of Borrelia burgdorferi sensu lato detected in 16 mammal species and questing ticks from northern Europe. Sci Rep 2019; 9:5088. [PMID: 30911054 PMCID: PMC6434031 DOI: 10.1038/s41598-019-41686-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 03/14/2019] [Indexed: 12/30/2022] Open
Abstract
Lyme borreliosis is the most common vector-borne zoonosis in the northern hemisphere, and the pathogens causing Lyme borreliosis have distinct, incompletely described transmission cycles involving multiple host groups. The mammal community in Fennoscandia differs from continental Europe, and we have limited data on potential competent and incompetent hosts of the different genospecies of Borrelia burgdorferi sensu lato (sl) at the northern distribution ranges where Lyme borreliosis is emerging. We used qPCR to determine presence of B. burgdorferi sl in tissue samples (ear) from 16 mammalian species and questing ticks from Norway, and we sequenced the 5S-23 S rDNA intergenic spacer region to determine genospecies from 1449 qPCR-positive isolates obtaining 423 sequences. All infections coming from small rodents and shrews were linked to the genospecies B. afzelii, while B. burgdorferi sensu stricto (ss) was only found in red squirrels (Sciurus vulgaris). Red squirrels were also infected with B. afzelii and B. garinii. There was no evidence of B. burgdorferi sl infection in moose (Alces alces), red deer (Cervus elaphus) or roe deer (Capreolus capreolus), confirming the role of cervids as incompetent hosts. In infected questing ticks in the two western counties, B. afzelii (67% and 75%) dominated over B. garinii (27% and 21%) and with only a few recorded B. burgdorferi ss and B. valaisiana. B. burgdorferi ss were more common in adult ticks than in nymphs, consistent with a reservoir in squirrels. Our study identifies potential competent hosts for the different genospecies, which is key to understand transmission cycles at high latitudes of Europe.
Collapse
|
7
|
Mendoza-Roldan JA, Colella V, Lia RP, Nguyen VL, Barros-Battesti DM, Iatta R, Dantas-Torres F, Otranto D. Borrelia burgdorferi (sensu lato) in ectoparasites and reptiles in southern Italy. Parasit Vectors 2019; 12:35. [PMID: 30646928 PMCID: PMC6332633 DOI: 10.1186/s13071-019-3286-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 01/03/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Borrelia burgdorferi (sensu lato) is a complex containing pathogenic bacteria of which some species, such as Borrelia lusitaniae, use birds, small mammals and reptiles as reservoirs. In Italy, the bacteria have been detected in reptilian and avian reservoirs in the northern and central regions. RESULTS Here, 211 reptiles from three orders [Squamata (Sauria with seven species in five families and Ophidia with 11 species in three families), Crocodylia (one family and two species), and Testudines (two families and two species)] were examined for ectoparasites and molecular detection of B. burgdorferi (s.l.) in three different sites of southern Italy, an area for which no information was previously available on the occurrence of borreliosis in animals and humans. Borrelia lusitaniae was molecularly detected in larvae and nymphs (11.6%) of Ixodes ricinus infesting lizards (i.e. Podarcis muralis, Podarcis siculus and Lacerta bilineata) and in 12.3% blood samples of P. siculus. Finally, B. lusitaniae and Borrelia garinii were detected in 5.1% (32/630) of questing I. ricinus. CONCLUSIONS These results show the circulation of B. lusitaniae in southern Italy and suggest that P. siculus could play a role as a reservoir, representing a potential medical threat to humans living in or visiting these localities.
Collapse
Affiliation(s)
- Jairo Alfonso Mendoza-Roldan
- Deparment of Veterinary Medicine, University of Bari, 70010 Valenzano (BA), Italy
- Faculty of Veterinary Medicine, University of São Paulo, São Paulo, 05508-270 Brazil
- Butantan Institute, São Paulo, 05503-900 Brazil
| | - Vito Colella
- Deparment of Veterinary Medicine, University of Bari, 70010 Valenzano (BA), Italy
| | - Riccardo Paolo Lia
- Deparment of Veterinary Medicine, University of Bari, 70010 Valenzano (BA), Italy
| | - Viet Linh Nguyen
- Deparment of Veterinary Medicine, University of Bari, 70010 Valenzano (BA), Italy
| | - Darci Moraes Barros-Battesti
- Faculty of Veterinary Medicine, University of São Paulo, São Paulo, 05508-270 Brazil
- Department of Veterinary Pathology, Universidade Estadual Paulista, Jaboticabal, 14884-900 Brazil
| | - Roberta Iatta
- Deparment of Veterinary Medicine, University of Bari, 70010 Valenzano (BA), Italy
| | - Filipe Dantas-Torres
- Deparment of Veterinary Medicine, University of Bari, 70010 Valenzano (BA), Italy
- Aggeu Magalhães Institute, Oswaldo Cruz Foundation, Recife, Pernambuco 50670-420 Brazil
| | - Domenico Otranto
- Deparment of Veterinary Medicine, University of Bari, 70010 Valenzano (BA), Italy
| |
Collapse
|
8
|
Hofmeester TR, Krawczyk AI, van Leeuwen AD, Fonville M, Montizaan MGE, van den Berge K, Gouwy J, Ruyts SC, Verheyen K, Sprong H. Role of mustelids in the life-cycle of ixodid ticks and transmission cycles of four tick-borne pathogens. Parasit Vectors 2018; 11:600. [PMID: 30458847 PMCID: PMC6245527 DOI: 10.1186/s13071-018-3126-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 09/28/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Elucidating which wildlife species significantly contribute to the maintenance of Ixodes ricinus populations and the enzootic cycles of the pathogens they transmit is imperative in understanding the driving forces behind the emergence of tick-borne diseases. Here, we aimed to quantify the relative contribution of four mustelid species in the life-cycles of I. ricinus and Borrelia burgdorferi (sensu lato) in forested areas and to investigate their role in the transmission of other tick-borne pathogens. Road-killed badgers, pine martens, stone martens and polecats were collected in Belgium and the Netherlands. Their organs and feeding ticks were tested for the presence of tick-borne pathogens. RESULTS Ixodes hexagonus and I. ricinus were found on half of the screened animals (n = 637). Pine martens had the highest I. ricinus burden, whereas polecats had the highest I. hexagonus burden. We detected DNA from B. burgdorferi (s.l.) and Anaplasma phagocytophilum in organs of all four mustelid species (n = 789), and Neoehrlichia mikurensis DNA was detected in all species, except badgers. DNA from B. miyamotoi was not detected in any of the investigated mustelids. From the 15 larvae of I. ricinus feeding on pine martens (n = 44), only one was positive for B. miyamotoi DNA, and all tested negative for B. burgdorferi (s.l.), N. mikurensis and A. phagocytophilum. The two feeding larvae from the investigated polecats (n = 364) and stone martens (n = 39) were negative for all four pathogens. The infection rate of N. mikurensis was higher in feeding nymphs collected from mustelids compared to questing nymphs, but not for B. burgdorferi (s.l.), B. miyamotoi or A. phagocytophilum. CONCLUSIONS Although all stages of I. ricinus can be found on badgers, polecats, pine and stone martens, their relative contribution to the life-cycle of I. ricinus in forested areas is less than 1%. Consequently, the relative contribution of mustelids to the enzootic cycles of I. ricinus-borne pathogens is negligible, despite the presence of these pathogens in organs and feeding ticks. Interestingly, all four mustelid species carried all stages of I. hexagonus, potentially maintaining enzootic cycles of this tick species apart from the cycle involving hedgehogs as main host species.
Collapse
Affiliation(s)
- Tim R Hofmeester
- Resource Ecology Group, Wageningen University, Wageningen, the Netherlands. .,Present address: Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 907 36, Umeå, Sweden.
| | - Aleksandra I Krawczyk
- Centre for Zoonoses and Environmental Microbiology, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Arieke Docters van Leeuwen
- Centre for Zoonoses and Environmental Microbiology, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Manoj Fonville
- Centre for Zoonoses and Environmental Microbiology, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | | | - Koen van den Berge
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium
| | - Jan Gouwy
- Research Institute for Nature and Forest (INBO), Geraardsbergen, Belgium
| | - Sanne C Ruyts
- Forest and Nature Lab, Department of Environment, Ghent University, Geraardsbergsesteenweg 267, 9090, Gontrode, Melle, Belgium
| | - Kris Verheyen
- Forest and Nature Lab, Department of Environment, Ghent University, Geraardsbergsesteenweg 267, 9090, Gontrode, Melle, Belgium
| | - Hein Sprong
- Centre for Zoonoses and Environmental Microbiology, Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands.
| |
Collapse
|
9
|
Tick-borne pathogens in Finland: comparison of Ixodes ricinus and I. persulcatus in sympatric and parapatric areas. Parasit Vectors 2018; 11:556. [PMID: 30355331 PMCID: PMC6201636 DOI: 10.1186/s13071-018-3131-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 10/02/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Almost 3500 tick samples, originally collected via a nationwide citizen science campaign in 2015, were screened to reveal the prevalence and distribution of a wide spectrum of established and putative tick-borne pathogens vectored by Ixodes ricinus and I. persulcatus in Finland. The unique geographical distribution of these two tick species in Finland allowed us to compare pathogen occurrence between an I. ricinus-dominated area (southern Finland), an I. persulcatus-dominated area (northern Finland), and a sympatric area (central Finland). RESULTS Of the analysed ticks, almost 30% carried at least one pathogen and 2% carried more than one pathogen. A higher overall prevalence of tick-borne pathogens was observed in I. ricinus than in I. persulcatus: 30.0% (604/2014) versus 24.0% (348/1451), respectively. In addition, I. ricinus were more frequently co-infected than I. persulcatus: 2.4% (49/2014) versus 0.8% (12/1451), respectively. Causative agents of Lyme borreliosis, i.e. bacterial genospecies in Borrelia burgdorferi (sensu lato) group, were the most prevalent pathogens (overall 17%). "Candidatus Rickettsia tarasevichiae" was found for the first time in I. ricinus ticks and in Finnish ticks in general. Moreover, Babesia divergens, B. venatorum and "Candidatus Neoehrlichia mikurensis" were reported for the first time from the Finnish mainland. CONCLUSIONS The present study provides valuable information on the prevalence and geographical distribution of various tick-borne pathogens in I. ricinus and I. persulcatus ticks in Finland. Moreover, this comprehensive subset of ticks revealed the presence of rare and potentially dangerous pathogens. The highest prevalence of infected ticks was in the I. ricinus-dominated area in southern Finland, while the prevalence was essentially equal in sympatric and I. persulcatus-dominated areas. However, the highest infection rates for both species were in areas of their dominance, either in south or north Finland.
Collapse
|
10
|
Gallais F, De Martino SJ, Sauleau EA, Hansmann Y, Lipsker D, Lenormand C, Talagrand-Reboul E, Boyer PH, Boulanger N, Jaulhac B, Schramm F. Multilocus sequence typing of clinical Borreliella afzelii strains: population structure and differential ability to disseminate in humans. Parasit Vectors 2018; 11:374. [PMID: 29954419 PMCID: PMC6027761 DOI: 10.1186/s13071-018-2938-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/06/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Lyme borreliosis in humans results in a range of clinical manifestations, thought to be partly due to differences in the pathogenicity of the infecting strain. This study compared European human clinical strains of Borreliella afzelii (previously named Borrelia afzelii) using multilocus sequence typing (MLST) to determine their spatial distribution across Europe and to establish whether there are associations between B. afzelii genotypes and specific clinical manifestations of Lyme borreliosis. For this purpose, typing was performed on 63 strains, and data on a further 245 strains were accessed from the literature. RESULTS All 308 strains were categorized into 149 sequence types (STs), 27 of which are described here for the first time. Phylogenetic and goeBURST analyses showed short evolutionary distances between strains. Although the main STs differed among the countries with the largest number of strains of interest (Germany, the Netherlands, France and Slovenia), the B. afzelii clinical strains were less genetically structured than those previously observed in the European tick population. Two STs were found significantly more frequently in strains associated with clinical manifestations involving erythema migrans, whereas another ST was found significantly more frequently in strains associated with disseminated manifestations, especially neuroborreliosis. CONCLUSIONS The MLST profiles showed low genetic differentiation between B. afzelii strains isolated from patients with Lyme borreliosis in Europe. Also, clinical data analysis suggests the existence of lineages with differential dissemination properties in humans.
Collapse
Affiliation(s)
- Floriane Gallais
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France
| | - Sylvie J De Martino
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France.,French National Reference Center for Borrelia, University Hospital Strasbourg, Strasbourg, France.,Groupe d'Étude de la Borréliose de Lyme (GEBLY), Strasbourg, France
| | - Erik A Sauleau
- Public Health, Methods in Clinical Research Team, University Hospital Strasbourg, Strasbourg, France
| | - Yves Hansmann
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France.,Groupe d'Étude de la Borréliose de Lyme (GEBLY), Strasbourg, France.,Infectious Disease Department, University Hospital Strasbourg, Strasbourg, France
| | - Dan Lipsker
- Groupe d'Étude de la Borréliose de Lyme (GEBLY), Strasbourg, France.,Dermatology Department, University Hospital Strasbourg, Strasbourg, France
| | - Cédric Lenormand
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France.,Groupe d'Étude de la Borréliose de Lyme (GEBLY), Strasbourg, France.,Dermatology Department, University Hospital Strasbourg, Strasbourg, France
| | - Emilie Talagrand-Reboul
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France
| | - Pierre H Boyer
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France
| | - Nathalie Boulanger
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France.,French National Reference Center for Borrelia, University Hospital Strasbourg, Strasbourg, France
| | - Benoît Jaulhac
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France.,French National Reference Center for Borrelia, University Hospital Strasbourg, Strasbourg, France.,Groupe d'Étude de la Borréliose de Lyme (GEBLY), Strasbourg, France
| | - Frédéric Schramm
- EA7290 Early Bacterial Virulence: Lyme borreliosis Group, FMTS, University of Strasbourg, Strasbourg, France.
| |
Collapse
|
11
|
Ruyts SC, Landuyt D, Ampoorter E, Heylen D, Ehrmann S, Coipan EC, Matthysen E, Sprong H, Verheyen K. Low probability of a dilution effect for Lyme borreliosis in Belgian forests. Ticks Tick Borne Dis 2018; 9:1143-1152. [PMID: 29716838 DOI: 10.1016/j.ttbdis.2018.04.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 04/20/2018] [Accepted: 04/21/2018] [Indexed: 11/16/2022]
Abstract
An increasing number of studies have investigated the consequences of biodiversity loss for the occurrence of vector-borne diseases such as Lyme borreliosis, the most common tick-borne disease in the northern hemisphere. As host species differ in their ability to transmit the Lyme borreliosis bacteria Borrelia burgdorferi s.l. to ticks, increased host diversity can decrease disease prevalence by increasing the proportion of dilution hosts, host species that transmit pathogens less efficiently. Previous research shows that Lyme borreliosis risk differs between forest types and suggests that a higher diversity of host species might dilute the contribution of small rodents to infect ticks with B. afzelii, a common Borrelia genospecies. However, empirical evidence for a dilution effect in Europe is largely lacking. We tested the dilution effect hypothesis in 19 Belgian forest stands of different forest types along a diversity gradient. We used empirical data and a Bayesian belief network to investigate the impact of the proportion of dilution hosts on the density of ticks infected with B. afzelii, and identified the key drivers determining the density of infected ticks, which is a measure of human infection risk. Densities of ticks and B. afzelii infection prevalence differed between forest types, but the model indicated that the density of infected ticks is hardly affected by dilution. The most important variables explaining variability in disease risk were related to the density of ticks. Combining empirical data with a model-based approach supported decision making to reduce tick-borne disease risk. We found a low probability of a dilution effect for Lyme borreliosis in a north-western European context. We emphasize that under these circumstances, Lyme borreliosis prevention should rather aim at reducing tick-human contact rate instead of attempting to increase the proportion of dilution hosts.
Collapse
Affiliation(s)
- Sanne C Ruyts
- Forest & Nature Lab, Department of Environment, Ghent University, Geraardsbergsesteenweg 267, 9090, Melle-Gontrode, Belgium
| | - Dries Landuyt
- Forest & Nature Lab, Department of Environment, Ghent University, Geraardsbergsesteenweg 267, 9090, Melle-Gontrode, Belgium
| | - Evy Ampoorter
- Forest & Nature Lab, Department of Environment, Ghent University, Geraardsbergsesteenweg 267, 9090, Melle-Gontrode, Belgium
| | - Dieter Heylen
- Evolutionary Ecology Group, Department of Biology, University of Antwerp, Universiteitsplein 11, 2610, Wilrijk, Belgium
| | - Steffen Ehrmann
- Geobotany, Faculty of Biology, University of Freiburg, Schänzlestr. 1, D-79104, Freiburg, Germany
| | - Elena C Coipan
- Wageningen University and Research, Plant Sciences Group, Bio-interactions and Plant Health Business Unit, P.O. Box 16, 6700 AA,Wageningen, The Netherlands
| | - Erik Matthysen
- Evolutionary Ecology Group, Department of Biology, University of Antwerp, Universiteitsplein 11, 2610, Wilrijk, Belgium
| | - Hein Sprong
- Centre for Infectious Disease Control Netherlands, National Institute for Public Health and Environment, P.O. Box 1, 3720 BA, Bilthoven, The Netherlands
| | - Kris Verheyen
- Forest & Nature Lab, Department of Environment, Ghent University, Geraardsbergsesteenweg 267, 9090, Melle-Gontrode, Belgium.
| |
Collapse
|
12
|
Abstract
Lyme borreliosis (LB) is an endemic disease in adults in Western countries. Although children may also be infected, pediatric studies on LB are scarce. This study aims to estimate the incidence of LB among children with a clinical suspicion for Lyme in a tertiary referral center in the Netherlands. Patient chart data on medical history, clinical signs and symptoms, diagnostic test results and diagnoses were collected using standardized case record forms. Patients were categorized based on clinical and laboratory findings using a modified, previously published classification system. We included 325 children, with a median age of 11.9 years, of whom 61.8% were female. LB was diagnosed in 38 of the referred children (11.7%). However, of the 85 patients who were specifically referred to the Lyme clinic, 28 (32.9%) were diagnosed with LB. Of the specifically referred Lyme-positive patients, 11 (39.3%) had a definitive LB diagnosis. Twelve children had a posttreatment LB syndrome. In line with previous reports in adults, only a small proportion of children referred with a suspicion of LB were diagnosed with definite or probable LB, which illustrates the difficulty in diagnosing LB by the general practitioner or pediatrician in a district hospital.
Collapse
|
13
|
The novel Lyme borreliosis vaccine VLA15 shows broad protection against Borrelia species expressing six different OspA serotypes. PLoS One 2017; 12:e0184357. [PMID: 28863166 PMCID: PMC5581183 DOI: 10.1371/journal.pone.0184357] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 08/22/2017] [Indexed: 12/13/2022] Open
Abstract
We have previously shown that the Outer surface protein A (OspA) based Lyme borreliosis vaccine VLA15 induces protective immunity in mice. Herein, we report the induction of protective immunity by VLA15 with mouse models using ticks infected with B. burgdorferi (OspA serotype 1), B. afzelii (OspA serotype 2) and B. bavariensis (OspA serotype 4) or with in vitro grown B. garinii (OspA serotype 5 and 6) for challenge. For B. garinii (OspA serotype 3), we have developed a growth inhibition assay using chicken complement and functional antibodies targeting B. garinii (OspA serotype 3) could be demonstrated after immunization with VLA15. Furthermore, following three priming immunizations, a booster dose was administered five months later and the induction of immunological memory could be confirmed. Thus, the antibody titers after the booster dose were increased considerably compared to those after primary immunization. In addition, the half-lives of anti-OspA serotype specific antibodies after administration of the booster immunization were longer than after primary immunization. Taken together, we could show that VLA15 induced protection in mice against challenge with four different clinically relevant Borrelia species (B. burgdorferi, B. afzelii, B. garinii and B. bavariensis) expressing five of the six OspA serotypes included in the vaccine. The protection data is supported by functional assays showing efficacy against spirochetes expressing any of the six OspA serotypes (1 to 6). To our knowledge, this is the first time a Lyme borreliosis vaccine has been able to demonstrate such broad protection in preclinical studies. These new data provide further promise for the clinical development of VLA15 and supports our efforts to provide a new Lyme borreliosis vaccine available for global use.
Collapse
|
14
|
Sprong H, Coipan EC, Maassen CB. Response to Sequence data management for scientific purposes. INFECTION GENETICS AND EVOLUTION 2017; 54:509. [PMID: 28710017 DOI: 10.1016/j.meegid.2017.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Hein Sprong
- National Institute of Public Health and Environment (RIVM), Laboratory for Zoonoses and Environmental Microbiology, The Netherlands.
| | - Elena Claudia Coipan
- Wageningen Plant Research, Business Unit Biointeractions and Plant Health, The Netherlands.
| | - Catharina B Maassen
- National Institute of Public Health and Environment (RIVM), Laboratory for Zoonoses and Environmental Microbiology, The Netherlands
| |
Collapse
|