Parasitic Helminths: Drug Resistance, Control and Immune Evasion

A special issue of Pathogens (ISSN 2076-0817). This special issue belongs to the section "Parasitic Pathogens".

Deadline for manuscript submissions: closed (30 October 2023) | Viewed by 1300

Special Issue Editors


E-Mail Website
Guest Editor
Institute of Parasitology, McGill University, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada
Interests: helminth; parasite; host–parasite interaction; drug resistance; control

E-Mail Website
Guest Editor
Institute of Parasitology, McGill University, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada
Interests: pharmacology of antiparasitic drugs; helminth parasite-host interface

Special Issue Information

Dear Colleagues,

Parasite helminths are globally distributed and highly prevalent metazoan pathogens, with billions of individuals infected worldwide with diseases such as schistosomiasis or lymphatic filariasis. They are also responsible for important veterinary diseases such as gastrointestinal helminthiasis and dirofilariasis, respectively, in livestock and companion animals, leading to significant economic losses. Treatment and control of helminthiasis are limited and rely on a few anthelmintic classes for which mass drug administration has already led to widespread drug resistance in nematodes, and threats extend to trematodes and cestodes. No recombinant vaccines are available. Alternative treatment strategies are urgently needed. In this context, understanding the essential physiological and developmental processes of helminth biology is crucial to the identification of novel means to control these parasites.

Some helminths live for years in their host due to their ability to evade the host immune system and survive under drug pressure. Schistosoma spp. and other helminths release excreted/secreted products that have immunomodulatory properties, contributing to parasite-parasite and host–parasite communication. Nematodes such as Haemonchus or Dirofilaria have developed mechanisms of resistance to anthelmintics, threatening current control of these important veterinary parasites. Unravelling the molecular mechanisms and cellular pathways by which the parasites either evade the host immune system or survive drug pressure could provide new strategies to combat helminthiasis.

I invite colleagues investigating any of these mechanisms in helminths to submit their manuscripts to this Special Issue in the form of original research and reviews.

Dr. Thavy Long
Prof. Dr. Timothy G. Geary
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Pathogens is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • helminth
  • parasite
  • host–parasite interaction
  • drug resistance
  • control

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

10 pages, 1251 KiB  
Article
First Report of Benzimidazole Resistance in Field Population of Haemonchus contortus from Sheep, Goats and Cattle in Bosnia and Herzegovina
by Naida Kapo, Jasmin Omeragić, Šejla Goletić, Emina Šabić, Adis Softić, Ahmed Smajlović, Indira Mujezinović, Vedad Škapur and Teufik Goletić
Pathogens 2024, 13(1), 77; https://doi.org/10.3390/pathogens13010077 - 15 Jan 2024
Viewed by 905
Abstract
Haemonchus contortus is a globally significant parasitic nematode in ruminants, with widespread resistance to benzimidazole due to its excessive and prolonged use. Given the extensive use of benzimidazole anthelmintics in Bosnia and Herzegovina, we hypothesized that resistance is prevalent. The aim of this [...] Read more.
Haemonchus contortus is a globally significant parasitic nematode in ruminants, with widespread resistance to benzimidazole due to its excessive and prolonged use. Given the extensive use of benzimidazole anthelmintics in Bosnia and Herzegovina, we hypothesized that resistance is prevalent. The aim of this study was to identify the presence of anthelmintic resistance to benzimidazole in H. contortus from naturally infected sheep, goats and cattle in Bosnia and Herzegovina through the detection of the Phe/Tyr polymorphism in the amino acid at position 200 of the β-tubulin protein. From 19 locations in Bosnia and Herzegovina, a total of 83 adult H. contortus were collected from the abomasum of ruminants. Among these, 45 H. contortus specimens were isolated from sheep, 19 from goats and 19 from cattle. Results showed that 77.8% of H. contortus in sheep exhibited homozygous resistant genotypes at position 200 of the β-tubulin gene, with 15.5% being heterozygous. In goats, all tested H. contortus (100%) were homozygous resistant, and no heterozygous resistant or homozygous sensitive genotypes were found. Cattle had 94.7% homozygous resistant H. contortus, with no heterozygous resistant genotypes detected. In H. contortus from sheep and cattle, 6.7% and 5.3%, respectively, displayed homozygous sensitive genotypes. This study, for the first time, highlights the presence of a resistant population of H. contortus in sheep, goats and cattle in Bosnia and Herzegovina, using the rt-qPCR method. The resistance likely spread from sheep or goats to cattle, facilitated by shared pastures and the practice of transhumance, indicating a widespread and growing issue of anthelmintic resistance. Full article
(This article belongs to the Special Issue Parasitic Helminths: Drug Resistance, Control and Immune Evasion)
Show Figures

Figure 1

Back to TopTop