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Absence of Wolbachia endobacteria in the human parasitic nematode Dracunculus medinensis and two related Dracunculus species infecting wildlife

Foster, Jeremy M, Landmann, Frédéric, Ford, Louise, Johnston, Kelly, Elsasser, Sarah C, Schulte-Hostedde, Albrecht I, Taylor, Mark ORCID: and Slatko, Barton E (2014) 'Absence of Wolbachia endobacteria in the human parasitic nematode Dracunculus medinensis and two related Dracunculus species infecting wildlife'. Parasites & Vectors, Vol 7, e140.

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Wolbachia endosymbionts are a proven target for control of human disease caused by filarial nematodes. However, little is known about the occurrence of Wolbachia in taxa closely related to the superfamily Filarioidea. Our study addressed the status of Wolbachia presence in members of the superfamily Dracunculoidea by screening the human parasite Dracunculus medinensis and related species from wildlife for Wolbachia.


D. medinensis, D. lutrae and D. insignis specimens were all negative for Wolbachia colonization by PCR screening for the Wolbachia ftsZ, 16S rRNA and Wolbachia surface protein (wsp) sequences. The quality and purity of the DNA preparations was confirmed by amplification of nematode 18S rRNA and cytochrome c oxidase subunit I sequences. Furthermore, Wolbachia endobacteria were not detected by whole mount fluorescence staining, or by immunohistochemistry using a Wolbachia-specific antiserum. In contrast, positive control Brugia malayi worms were shown to harbour Wolbachia by PCR, fluorescence staining and immunohistochemistry.


Three examined species of Dracunculus showed no evidence of Wolbachia endobacteria. This supports that members of the superfamily Dracunculoidea are free of Wolbachia. Within the order Spirurida, these endosymbionts appear restricted to the Filarioidea.

Item Type: Article
Additional Information: The electronic version of this article is the complete one and can be found online at:
Subjects: QW Microbiology and Immunology > Bacteria > QW 150 Proteobacteria. Rickettsiaceae, Wolbachia
QX Parasitology > Helminths. Annelida > QX 203 Nematoda
QX Parasitology > QX 45 Host-parasite relations
Faculty: Department: Biological Sciences > Department of Tropical Disease Biology
Digital Object Identifer (DOI):
Depositing User: Martin Chapman
Date Deposited: 05 Feb 2015 15:00
Last Modified: 16 Sep 2019 09:01


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