Rickettsia helvetica infection is associated with microbiome modulation in Ixodes ricinus collected from humans in Serbia - Archive ouverte HAL Access content directly
Journal Articles Scientific Reports Year : 2022

Rickettsia helvetica infection is associated with microbiome modulation in Ixodes ricinus collected from humans in Serbia

, , , , (1) , , , , , ,
1
Apolline Maitre
  • Function : Author
Alejandra Wu-Chuang
  • Function : Author
Lourdes Mateos-Hernández
  • Function : Author
Angélique Foucault-Simonin
  • Function : Author
Jean-Christophe Paoli
  • Function : Author
Alessandra Falchi
  • Function : Author
Adrian Díaz-Sánchez
  • Function : Author
Pavle Banović
  • Function : Author
Dasiel Obregón
  • Function : Author
Alejandro Cabezas-Cruz
  • Function : Author

Abstract

Abstract Rickettsia helvetica is an emerging pathogen of the Spotted Fever Group Rickettsia (SFGR) causing spotted fever diseases in various European countries. This tick-borne pathogen replicates in tick tissues such as the midgut and salivary gland, but its potential interactions with the vector microbiota is poorly characterized. The vector microbiome plays a pivotal role in tick-pathogen interactions, and some microbiota members facilitate or impede tick-borne pathogen infection. Manipulations of the tick microbiome have led to reduction in pathogen colonization in the tick vector. However, translating these findings into disease control applications requires a thorough characterization of vector microbiota response to different pathogens. In this study, we analyzed and compared the microbiota of Ixodes ricinus ticks attached on humans and collected in Serbia. Ticks were either infected with R. helvetica , or uninfected with major tick-borne pathogens (referred hereafter as ‘pathogen-free’). We used microbial co-occurrence network analysis to determine keystone taxa of each set of samples, and to study the interaction patterns of the microbial communities in response to pathogen infection. The inferred functional profiles of the tick microbiome in R. helvetica -positive and pathogen-free samples were also compared. Our results show that R. helvetica infection reduces significantly the diversity of the microbiota and the connectivity of the co-occurrence network. In addition, using co-occurrence network we identified bacterial taxa (i.e., Enterobacteriaceae, Comamonadaceae, and Bacillus ) that were negatively associated with ‘ Rickettsia ’ in R. helvetica -infected ticks, suggesting competition between R. helvetica and some members of the tick microbiota. The reconstruction of microbial metabolic pathways shows that the presence of R. helvetica might have a major impact on the metabolic functions of the tick microbiome. These results can inform novel interventions for the prevention of R. helvetica , or other SFGR infections in humans.

Dates and versions

anses-03942975 , version 1 (17-01-2023)

Identifiers

Cite

Apolline Maitre, Alejandra Wu-Chuang, Lourdes Mateos-Hernández, Angélique Foucault-Simonin, Sara Moutailler, et al.. Rickettsia helvetica infection is associated with microbiome modulation in Ixodes ricinus collected from humans in Serbia. Scientific Reports, 2022, 12 (1), pp.11464. ⟨10.1038/s41598-022-15681-x⟩. ⟨anses-03942975⟩

Collections

ANSES ENVA INRAE
0 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More