The Curious World of Lyme Disease Spirochetes: From Expected to Unpredicted

A special issue of Tropical Medicine and Infectious Disease (ISSN 2414-6366). This special issue belongs to the section "Vector-Borne Diseases".

Deadline for manuscript submissions: closed (20 December 2021) | Viewed by 25135

Special Issue Editor


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Guest Editor
Biology Centre Czech Academy of Sciences, Institute of Parasitology, 370 05 České Budějovice, Czech Republic
Interests: Borrelia burgdorferi sensu lato—ecology, detection, identification, characterization, genetic diversity, transmission, pathogenesis, persistence; clinical microbiology of Lyme borreliosis; bacterial response to antibiotics: antimicrobial resistance; bacterial persisters; microbial biofilms; development of molecular techniques for pathogens detection; molecular factors involved in vector–host–pathogen interactions; antimicrobial and other defense proteins involved in vector immune response
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Special Issue Information

Dear Colleagues, 

Lyme disease, a multisystem disorder caused by certain species of spirochetes from Borrelia burgdorferi sensu lato complex, is an incredibly controversial medical phenomenon that affects millions of people in the Northern hemisphere in many different ways. It is an infectious zoonotic disease that can usually be succesfully cured by antibiotic therapy at the very early stages of infection, targeting the replicative forms of spirochetes. The vast majority of people have no idea about the existance of Lyme disease spirochetes until they get infected. Transmitted to the hosts, including humans, during the bite of multiple species of hard ticks, Lyme disease spirochetes cause the most common vector-borne disease in the United States where it was officially recognized in the early 1970s. Borrelia lives in two distinct and different milieus and its whole existence is one lifelong struggle for survival. Since all Borrelia species are host-propagated bacteria that move between a vertebrate host and tick vector, the spirochetes have developed strategies to sense and survive in these diverse environments. The survival of Lyme disease spirochetes in both worlds is enabled by altering the level of gene expression in response to changes in temperature, pH, salts, nutrient content, multiple host- and vector-dependent factors and by interaction with vector and host proteins. However, the change in the gene expression level is not the only route to spirochete survival. The signals that Borrelia receives from hostile environments evoke morphological alterations that keep the pathogen alive and induce the production of atypical forms or persisters that are refractory to elimination. The formation of persisters in vitro and in vivo is a reversible process that establishes the basis for disease recurrence when the hostile pressure drops.

We encourage you to submit research papers or reviews to this Special Issue on any Borrelia-related topic, with the purpose of bringing new knowledge to the field in terms of a better understanding of the complex word of LD spirochetes, their unpredictable behaviour and inventive ways of survival, or to expand the discussion of another controversial subject called chronic Lyme disease.

Dr. Natasha Rudenko 
Guest Editor

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Keywords

  • zoonoses
  • tick-borne disease
  • Lyme disease
  • spirochetes
  • Borrelia burgdorferi sensu lato complex
  • elusive pathogens
  • transmission
  • survival strategies
  • differential gene expression
  • atypical morphology
  • dormant forms
  • persisters
  • biofilms
  • disease recurrence
  • detection
  • eradication
  • chronic disease
  • antibiotic treatment

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Published Papers (4 papers)

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Research

8 pages, 228 KiB  
Communication
Sexual Transmission of Lyme Borreliosis? The Question That Calls for an Answer
by Natalie Rudenko and Maryna Golovchenko
Trop. Med. Infect. Dis. 2021, 6(2), 87; https://doi.org/10.3390/tropicalmed6020087 - 24 May 2021
Cited by 10 | Viewed by 9100
Abstract
Transmission of the causative agents of numerous infectious diseases might be potentially conducted by various routes if this is supported by the genetics of the pathogen. Various transmission modes occur in related pathogens, reflecting a complex process that is specific for each particular [...] Read more.
Transmission of the causative agents of numerous infectious diseases might be potentially conducted by various routes if this is supported by the genetics of the pathogen. Various transmission modes occur in related pathogens, reflecting a complex process that is specific for each particular host–pathogen system that relies on and is affected by pathogen and host genetics and ecology, ensuring the epidemiological spread of the pathogen. The recent dramatic rise in diagnosed cases of Lyme borreliosis might be due to several factors: the shifting of the distributional range of tick vectors caused by climate change; dispersal of infected ticks due to host animal migration; recent urbanization; an increasing overlap of humans’ habitat with wildlife reservoirs and the environment of tick vectors of Borrelia; improvements in disease diagnosis; or establishment of adequate surveillance. The involvement of other bloodsucking arthropod vectors and/or other routes of transmission (human-to-human) of the causative agent of Lyme borreliosis, the spirochetes from the Borrelia burgdorferi sensu lato complex, has been speculated to be contributing to increased disease burden. It does not matter how controversial the idea of vector-free spirochete transmission might seem in the beginning. As long as evidence of sexual transmission of Borrelia burgdorferi both between vertebrate hosts and between tick vectors exists, this question must be addressed. In order to confirm or refute the existence of this phenomenon, which could have important implications for Lyme borreliosis epidemiology, the need of extensive research is obvious and required. Full article
13 pages, 1057 KiB  
Article
Assessing the Need for Multiplex and Multifunctional Tick-Borne Disease Test in Routine Clinical Laboratory Samples from Lyme Disease and Febrile Patients with a History of a Tick Bite
by Kunal Garg, T. Sakari Jokiranta, Sanna Filén and Leona Gilbert
Trop. Med. Infect. Dis. 2021, 6(1), 38; https://doi.org/10.3390/tropicalmed6010038 - 17 Mar 2021
Cited by 4 | Viewed by 6957
Abstract
Human polymicrobial infections in tick-borne disease (TBD) patients is an emerging public health theme. However, the requirement for holistic TBD tests in routine clinical laboratories is ambiguous. TICKPLEX® PLUS is a holistic TBD test utilized herein to assess the need for multiplex [...] Read more.
Human polymicrobial infections in tick-borne disease (TBD) patients is an emerging public health theme. However, the requirement for holistic TBD tests in routine clinical laboratories is ambiguous. TICKPLEX® PLUS is a holistic TBD test utilized herein to assess the need for multiplex and multifunctional diagnostic tools in a routine clinical laboratory. The study involved 150 specimens categorized into Lyme disease (LD)-positive (n = 48), LD-negative (n = 30), and febrile patients from whom borrelia serology was requested (n = 72, later “febrile patients”) based on reference test results from United Medix, Finland. Reference tests from DiaSorin, Immunetics, and Mikrogen Diagnostik followed the two-tier LD testing system. A comparison between the reference tests and TICKPLEX® PLUS produced 86%, 88%, and 87% positive, negative, and overall agreement, respectively. Additionally, up to 15% of LD and 11% of febrile patients responded to TBD related coinfections and opportunistic microbes. The results demonstrated that one (TICKPLEX® PLUS) test can aid in a LD diagnosis instead of four tests. Moreover, TBD is not limited to just LD, as the specimens produced immune responses to several TBD microbes. Lastly, the study indicated that the screening of febrile patients for TBDs could be a missed opportunity at reducing unreported patient cases. Full article
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7 pages, 217 KiB  
Article
Arthritis and Diagnostics in Lyme Disease
by Javier A. Quintero, Raluchukwu Attah, Reena Khianey, Eugenio Capitle and Steven E. Schutzer
Trop. Med. Infect. Dis. 2021, 6(1), 18; https://doi.org/10.3390/tropicalmed6010018 - 29 Jan 2021
Cited by 6 | Viewed by 3409
Abstract
The diagnosis of Lyme disease, caused by Borrelia burgdorferi, is clinical but frequently supported by laboratory tests. Lyme arthritis is now less frequently seen than at the time of its discovery. However, it still occurs, and it is important to recognize this, the [...] Read more.
The diagnosis of Lyme disease, caused by Borrelia burgdorferi, is clinical but frequently supported by laboratory tests. Lyme arthritis is now less frequently seen than at the time of its discovery. However, it still occurs, and it is important to recognize this, the differential diagnoses, and how laboratory tests can be useful and their limitations. The most frequently used diagnostic tests are antibody based. However, antibody testing still suffers from many drawbacks and is only an indirect measure of exposure. In contrast, evolving direct diagnostic methods can indicate active infection. Full article
17 pages, 1181 KiB  
Article
Microbiome Composition and Borrelia Detection in Ixodes scapularis Ticks at the Northwestern Edge of Their Range
by Janet L. H. Sperling, Daniel Fitzgerald, Felix A. H. Sperling and Katharine E. Magor
Trop. Med. Infect. Dis. 2020, 5(4), 173; https://doi.org/10.3390/tropicalmed5040173 - 18 Nov 2020
Cited by 13 | Viewed by 3946
Abstract
Lyme disease-causing Borrelia burgdorferi has been reported in 10–19% of Ixodes ticks from Alberta, Canada, where the tick vector Ixodes scapularis is at the northwestern edge of its range. However, the presence of Borrelia has not been verified independently, and the bacterial microbiome [...] Read more.
Lyme disease-causing Borrelia burgdorferi has been reported in 10–19% of Ixodes ticks from Alberta, Canada, where the tick vector Ixodes scapularis is at the northwestern edge of its range. However, the presence of Borrelia has not been verified independently, and the bacterial microbiome of these ticks has not been described. We performed 16S rRNA bacterial surveys on female I. scapularis from Alberta that were previously qPCR-tested in a Lyme disease surveillance program. Both 16S and qPCR methods were concordant for the presence of Borrelia. The 16S studies also provided a profile of associated bacteria that showed the microbiome of I. scapularis in Alberta was similar to other areas of North America. Ticks that were qPCR-positive for Borrelia had significantly greater bacterial diversity than Borrelia-negative ticks, on the basis of generalized linear model testing. This study adds value to ongoing tick surveillance and is a foundation for deeper understanding of tick microbial ecology and disease transmission in a region where I. scapularis range expansion, induced by climate and land use changes, is likely to have increasing public health implications. Full article
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