Opendata, web and dolomites


The Mexican leech Haementeria officinalis and its nutritional symbiont as a model system for the study of strict blood-feeding animal-microbe symbioses and bacteriocyte development

Total Cost €


EC-Contrib. €






 LEECHSYMBIO project word cloud

Explore the words cloud of the LEECHSYMBIO project. It provides you a very rough idea of what is the project "LEECHSYMBIO" about.

symbionts    officinalis    habit    intracellular    houses    interactions    species    sequence    metabolic    postdoc    bacterial    analysed    rely    maintained    techniques    mexican    lab    background    model    robusta    identification    history    feeding    blood    diet    strict    truly    molecular    organs    deficiency    evolution    transfer    genomes    imaging    animals    genome    additional    host    experimental    leeches    intricacies    chemical    genes    independent    vitamin    nutritional    symbiosis    isotope    insights    medically    determined    core    providencia    sequenced    biosynthesis    developmental    experiments    helobdella    efficient    microbe    bioinformatics    probing    colonization    haementeria    ideal    organ    researcher    determinants    stages    showed    metabolomics    symbioses    evolutionary    specialised    microscopy    bacteriome    siddallii    supplement    confronted    unbalanced    environment    symbiont    acquisition    ensures    leech    reconstruct    genomic    complementarity   

Project "LEECHSYMBIO" data sheet

The following table provides information about the project.


Organization address
city: WIEN
postcode: 1010

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Austria [AT]
 Total cost 186˙167 €
 EC max contribution 186˙167 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2018
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2020
 Duration (year-month-day) from 2020-01-15   to  2022-01-14


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITAT WIEN AT (WIEN) coordinator 186˙167.00


 Project objective

Strict blood-feeding leeches are confronted with a strong B-vitamin deficiency and thus rely on bacterial symbionts to supplement their unbalanced diet. Recent evidence showed that the Mexican leech Haementeria officinalis houses in a distinct specialised organ intracellular Providencia siddallii symbionts, which have a highly reduced genome but maintained genes required for B vitamin biosynthesis. The aim of this proposal is to establish this leech as a model system for studying the intricacies of nutritional blood-feeding symbioses. The genomes of Providencia symbionts of 4 additional Haementeria species will be sequenced and analysed to identify core-metabolic pathways and to reconstruct the evolutionary history of this symbiosis. A draft genome sequence of the Mexican leech Ha. officinalis will be determined, providing unique insights into metabolic complementarity. Comparison with the available genome of the related non-blood-feeding leech Helobdella robusta will facilitate identification of genomic determinants of the acquisition/loss of the bacteriome and the blood feeding habit. Bacteriome development and colonization will be investigated using different developmental stages and advanced microscopy techniques. Host control and nutritional role of the symbiont will be studied using isotope probing experiments and state-of-the-art chemical imaging and metabolomics methods. This project will provide comprehensive insights into a nutritional symbiosis in medically relevant blood-feeding animals, including the evolution of specialised symbiosis organs and metabolic interactions between both partners. It will bring together a postdoc with a strong background in bioinformatics and bacterial symbionts with a host lab focused on experimental and molecular analysis of microbe-host interactions. This set-up ensures both an ideal environment for the postdoc on his way to an truly independent researcher, and an efficient two-way transfer of knowledge.

Are you the coordinator (or a participant) of this project? Plaese send me more information about the "LEECHSYMBIO" project.

For instance: the website url (it has not provided by EU-opendata yet), the logo, a more detailed description of the project (in plain text as a rtf file or a word file), some pictures (as picture files, not embedded into any word file), twitter account, linkedin page, etc.

Send me an  email ( and I put them in your project's page as son as possible.

Thanks. And then put a link of this page into your project's website.

The information about "LEECHSYMBIO" are provided by the European Opendata Portal: CORDIS opendata.

More projects from the same programme (H2020-EU.1.3.2.)

MathematicsAnalogies (2019)

Mathematics Analogies

Read More  

NaWaTL (2020)

Narrative, Writing, and the Teotihuacan Language: Exploring Language History Through Phylogenetics, Epigraphy and Iconography

Read More  

MingleIFT (2020)

Multi-color and single-molecule fluorescence imaging of intraflagellar transport in the phasmid chemosensory cilia of C. Elegans

Read More