World association for the advancement of veterinary parasitology (WAAVP): Third edition of guideline for evaluating the efficacy of equine anthelmintics.

The research article offers guidelines for conducting and interpreting studies to assess the efficacy of anti-parasitic drugs in equines. It provides systematic instructions on aspects ranging from study designs, animal selection, feeding, dosage obligation, to statistical analysis of results.

Study Design and Execution

• This guideline provides specifications for the design and execution of studies to assess the efficacy of anthelmintic drugs for equines. This includes how to conduct controlled and critical studies, whether in labs or fields, each having their unique advantages and disadvantages outlined in the document.

Target Parasites

• It also recognizes that specific target parasites, such as nematodes, cestodes, and larval instars of Gasterophilus spp. may require unique considerations for the efficacy evaluation of equine anthelmintics. Guidelines for these considerations are hence included.

Animal Selection, Randomization, Housing and Feeding

• The document advises on the selection of animals, their housing, and feeding, ensuring consistency and minimizing variables that could affect the study outcomes.
• It also provides guidelines on randomization procedures, which help ensure that the selection and assignment of animals to different study groups is unbiased.

Dosage Confirmation and Titration

• For dosage confirmation, the guidelines provide systematic procedures that facilitate the verification of the prescribed dosage of anthelmintics.
• The concept of dosage titration, which involves fine-tuning the dosage to achieve optimal effect, is also delineated in the guidelines.

Record Keeping and Necropsy Procedures

• The guideline emphasizes the importance of detailed record keeping throughout the study for accurate data collection and result interpretation.
• The document also outlines the necropsy procedures, a post-mortem examination to determine the cause of death or the extent of disease, for equines involved in the studies.

Group Size Determination and Statistical Analysis

• The document provides guidance for determining group size, an essential aspect for statistical consistency and validity.
• In addition, it offers direction on the statistical analysis of study results. This segment is essential as it helps investigators make a sense of the raw data collected.

By offering a holistic, structured guideline, this document assists researchers in assessing the efficacy of anthelmintic drugs in horses, enabling the use of comparable, standardized study methods.