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Updated: Aug 23, 2026

Tick Microbiome Characterization by Next-Generation 16S rRNA Amplicon Sequencing
Published on: August 25, 2018
[Tick-borne human pathogenic microorganisms found in Europe and those considered nonpathogenic. Part II: Bacteria,
J Süss1, V Fingerle, K-P Hunfeld
1Bundesforschungsanstalt für Viruskrankheiten der Tiere, Standort, Jena. j.suess@jena.bfav.de
Abstract:
The importance of tick-borne diseases has significantly increased objectively and subjectively during the last few years. This fact was demonstrated by the description of tick-borne viruses, in particular with respect to tickborne encephalitis published in part I. Here in part II, tick-borne bacteria and parasites will be discussed as well the significance of these agents, their vectors, clinical course, diagnostics, prophylaxis, and therapy. Naturally, Lyme borreliosis, one of the most important tick-borne bacterial illnesses of humans, is the center of our interest. In addition to basic understanding, critical practice-relevant advice regarding all agents is presented. Similarly all tick-borne bacterial diseases such as relapsing fever, tularemia, ehrlichiosis, and rickettsiosis including Q fever will be discussed. Tick-borne zoonotic babesiae are parasites whose veterinary importance has been known for the last 100 years but whose relevance for human medicine only became evident in 1957. The fact that multiple and mixed infections caused by ticks are possible has been known for years. Taking into account such a high prevalence of the infectious agents in ticks, such multiple infections were to be expected. During the last few years it has become evident that double and multiple infections of humans caused by tick bites occur far more frequently than has been known so far. As a result, in cases of unclear anamnesis,new diagnostic and therapeutic approaches should be taken. In general one can say that considerable additional scientific research is necessary to effectively reduce the incidence of tick-borne diseases.
Insights
Tick-borne diseases caused by bacteria and parasites, including Lyme borreliosis, are a growing concern. Increased awareness of mixed infections necessitates updated diagnostic and therapeutic strategies for tick-borne illnesses.
Area of Science:
- Medical Entomology
- Infectious Diseases
- Parasitology
Background:
- Tick-borne diseases (TBDs) have seen a significant rise in incidence and recognition.
- Part II of this review focuses on bacterial and parasitic TBDs, complementing Part I on viral TBDs.
- Lyme borreliosis is a primary focus among bacterial TBDs affecting humans.
Purpose of the Study:
- To discuss the significance, vectors, clinical aspects, diagnostics, prophylaxis, and therapy of tick-borne bacteria and parasites.
- To provide practice-relevant advice on managing various TBDs.
- To highlight the increasing frequency and importance of multiple and mixed tick-borne infections in humans.
Main Methods:
- Review of current scientific literature on tick-borne bacterial and parasitic diseases.
- Synthesis of information on agents like Borrelia, Rickettsia, Ehrlichia, Babesia, and others.
- Analysis of clinical presentations, diagnostic challenges, and treatment protocols.
Main Results:
- Tick-borne bacteria such as those causing Lyme borreliosis, relapsing fever, tularemia, ehrlichiosis, rickettsiosis (including Q fever), and parasites like Babesia are significant public health threats.
- Multiple and mixed infections from single tick bites are occurring more frequently than previously understood.
- Unclear medical histories in patients may indicate complex tick-borne co-infections.
Conclusions:
- Effective reduction of TBD incidence requires further scientific research and enhanced diagnostic and therapeutic approaches.
- Clinicians should consider the possibility of multiple tick-borne infections, especially in cases with ambiguous symptoms.
- A comprehensive understanding of diverse tick-borne pathogens and their transmission is crucial for public health.
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