[Frequent deworming in horses; it usually does not do any good, but it often harms].

The research article examines the problem of drug-resistant parasites in horses in the Netherlands, caused by overuse of dewormers, and suggests more efficient and targeted approaches to anthelmintic treatments to delay further resistance.

Overview and Context

• This research was conducted due to a developing problem in the Netherlands where horse parasites have been increasingly showing resistance to anthelmintics, the medicines typically used for deworming, due to excessive and misguided use.
• The authors point out that it isn’t likely that new classes of deworming drugs for horses will be introduced soon, making it critical to apply the current drugs in a more discerning manner.

Recommendations for Veterinarians and Horse Owners

• The article suggests veterinarians should advise horse owners to adopt more targeted parasite control programs.
• They should try to reduce the number of anthelmintic treatments given, and through selective, targeted treatments, aim to delay the development of further drug resistance.

Not Treating Horses with Low Faecal Egg Count

• Importantly, the researchers propose that horses with a low faecal egg count should not be treated to ensure a reduction in the selection pressure for drug immunity.
• Based on findings, it is revealed that the propensity for low faecal egg counts is inherited. Therefore, mature horses with consistently low egg counts can be identified by faecal examination without having to repeat tests every time.

Precautions with New Horses

• New horses should always be dewormed upon arrival to a farm, and they should only be introduced once the effectiveness of the treatment is confirmed.
• The paper highlights the fact that the introduction of a new horse infected with drug-resistant parasites could pose the risk of introducing anthelmintic resistance into the existing population.

In conclusion, this research emphasizes the importance of more strategic and judicious use of deworming treatments in horses to prevent increased resistance to anthelmintic drugs. If the findings are duly implemented, they may effectively manage and control the growing problem of anthelmintic resistance in horses.