Related Experiment Video
Updated: Feb 11, 2026

Isolation of F1-ATPase from the Parasitic Protist Trypanosoma brucei
Published on: January 22, 2019
The 14th International Workshops on Opportunistic Protists (IWOP 14)
Melanie T Cushion1,2, Andrew H Limper3, Aleksey Porollo4,5
1Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, Ohio, 45267.
Abstract:
The 14th International Workshops on Opportunistic Protists (IWOP-14) was held August 10-12, 2017 in Cincinnati, OH, USA. The IWOP meetings focus on opportunistic protists (OIs); for example, free-living amoebae, Pneumocystis spp., Cryptosporidium spp., Toxoplasma, the Microsporidia, and kinetoplastid flagellates. The highlights of Pneumocystis spp. research included the reports of primary homothallism for mating; a potential requirement for sexual replication in its life cycle; a new antigen on the surface of small asci; roles for CLRs, Dectin-1, and Mincle in host responses; and identification of MSG families and mechanisms used for surface variation. Studies of Cryptosporidia spp. included comparative genomics, a new cryopreservation method; the role of mucin in attachment and invasion, and epidemiological surveys illustrating species diversity in animals. One of the five identified proteins in the polar tube of Microsporidia, PTP4, was shown to play a role in host infection. Zebrafish were used as a low cost vertebrate animal model for an evaluation of potential anti-toxoplasma drugs. Folk medicine compounds with anti-toxoplasma activity were presented, and reports on the chronic toxoplasma infection provided evidence for increased tractability for the study of this difficult life cycle stage. Escape from the parasitophorus vacuole and cell cycle regulation were the topics of the study in the acute phase.
Insights
Opportunistic protists (OIs) research highlights included Pneumocystis mating, Cryptosporidium genomics, Microsporidia infection mechanisms, and Toxoplasma drug discovery. Advances in understanding these pathogens advance treatments and diagnostics for OIs.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Parasitology
Background:
- Opportunistic protists (OIs) cause significant human and animal diseases.
- The 14th International Workshops on Opportunistic Protists (IWOP-14) convened to discuss recent advancements in OI research.
- Key OIs discussed include Pneumocystis spp., Cryptosporidium spp., Toxoplasma, Microsporidia, and kinetoplastid flagellates.
Purpose of the Study:
- To summarize key findings and research directions presented at IWOP-14.
- To highlight advancements in understanding the biology, host interactions, and potential treatments for various OIs.
- To foster collaboration and knowledge exchange within the OI research community.
Main Methods:
- Reports on primary homothallism and sexual replication in Pneumocystis spp.
- Comparative genomics and novel cryopreservation techniques for Cryptosporidium spp.
- Zebrafish models for anti-Toxoplasma drug screening and investigation of Microsporidia infection.
Main Results:
- New insights into Pneumocystis surface variation, host immune responses (CLR, Dectin-1, Mincle), and antigens.
- Identification of PTP4's role in Microsporidia host infection and Cryptosporidium mucin interactions.
- Evaluation of folk medicine compounds against Toxoplasma and improved models for studying chronic infections.
Conclusions:
- Significant progress has been made in understanding the life cycles, host interactions, and genetic diversity of OIs.
- Novel methods and models are accelerating the development of diagnostics and therapeutics for OI infections.
- Continued research on OIs is crucial for addressing global health challenges posed by these pathogens.
Related Concept Videos
Diversity of Protists III
Diversity of Protists I
Diversity of Protists II
Overview of Protists
Internal Energy
Internal Energy

