Effect of ivermectin on experimental trichinosis

Area of Science:

• Veterinary Parasitology
• Pharmacology
• Microscopy

Background:

• Ivermectin is a broad-spectrum antiparasitic drug effective against nematodes and arthropods.
• Trichinella spiralis is a nematode parasite causing trichinellosis in various hosts.
• Assessing the efficacy of ivermectin against Trichinella spiralis is crucial for developing treatment strategies.

Purpose of the Study:

• To evaluate the efficacy of a single dose of ivermectin against Trichinella spiralis infection in Swiss albino mice.
• To determine the optimal timing for ivermectin administration in relation to infection.
• To investigate the effects of ivermectin on parasite load and morphology.

Main Methods:

• Swiss albino mice were infected with Trichinella spiralis.
• Ivermectin was administered as a single dose at various time points: 1 day before infection, on the day of infection, and 5, 10, and 35 days post-infection.
• Parasitological assessments included adult and larval counts, measurements of adult female and larval length, and the reproductive capacity index.
• Scanning electron microscopy (SEM) was used to examine the morphological changes in adult worms and larvae.

Main Results:

• Ivermectin demonstrated significant efficacy in reducing adult and larval counts of Trichinella spiralis.
• The drug was most effective when administered on the same day as the infection.
• Delayed administration resulted in progressively diminished efficacy, with notable changes in parasite morphology observed under SEM.

Conclusions:

• Single-dose ivermectin treatment is effective against Trichinella spiralis infection in mice.
• Early administration of ivermectin, particularly on the day of infection, yields the best therapeutic outcomes.
• The timing of ivermectin treatment significantly influences its efficacy against Trichinella spiralis.