Establishment of a panel of reference Trypanosoma evansi and Trypanosoma equiperdum strains for drug screening.

This research focuses on the development of a reference panel of two protozoan species, Trypanosoma evansi and Trypanosoma equiperdum, which are known to cause serious diseases in animals. The intention behind this panel is to facilitate drug screening, particularly in light of increasing drug resistance.

Introduction and Research Issue

• The article discusses the challenges in the effective control of two pathogenic protozoans, Trypanosoma evansi and Trypanosoma equiperdum, due to increasing drug resistance.
• The former causes a wasting disease named Surra in various animals like horses, cattle, and camels, leading to significant economic losses. It has a wide distribution across the globe and affects a broad range of mammalian hosts.
• On the other hand, Trypanosoma equiperdum instigates a venereal disease called Dourine, primarily affecting horses and donkeys. This infection is typically considered incurable.

Methodology and Results

• The researchers establish a reference panel comprising various strains of these two Trypanosoma species. This was done to help in drug screening, especially for new alternative drugs, given the increasing resistance to the currently available options.
• The drug profiling of this panel was done against four standard drugs that are currently used in treatment. They applied the (3)H-hypoxanthine incorporation assay technique to determine the 50% inhibitory concentration (IC(50)) values for these drugs against the different strains in the panel.
• The outcome of this process indicated varying levels of drug resistance in several strains. Some of these resistances appear to be emerging, which highlights the pressing need for alternative treatment options.

Significance and Utility of the Research

• The established panel of characterised strains with known drug sensitivities and resistances provides a valuable resource for future drug screening endeavours. This aids in the identification and development of new effective drugs to combat these diseases.
• By making comparisons with the current standard drugs, researchers can better evaluate the potential of new active compounds.
• This research plays a crucial role in advancing responses to the increasing issue of drug resistance in the management of these devastating animal diseases.