Eradication of lice in cattle

Area of Science:

• Veterinary Entomology
• Parasitology
• Livestock Management

Background:

• Cattle lice infestations, including biting lice (Damalinia bovis) and sucking lice (Linognathus vituli), are prevalent in Northern Europe.
• Infestations significantly impact animal health and productivity.

Purpose of the Study:

• To develop and evaluate an eradication strategy for controlling lice in cattle herds.
• To assess the effectiveness and identify risk factors associated with lice eradication and reinfection.

Main Methods:

• A two-and-a-half-year field study involving 33 cattle herds.
• Monitoring lice prevalence before, during, and after an eradication strategy.
• Analyzing factors contributing to eradication failure and reinfection.

Main Results:

• Initial lice prevalence: 94% of herds had biting lice, 42% had sucking lice.
• Eradication was successful in 28 of 33 herds.
• Reinfection occurred in 9 of 28 previously cleared herds within 12 months.
• Failure to pre-treat newly introduced animals was a significant risk factor for reinfection.

Conclusions:

• Cattle lice eradication is feasible but requires ongoing vigilance.
• Preventative measures, especially pre-treatment of new livestock, are crucial to prevent reinfection.
• Management practices like controlling livestock purchases and pasture use are key to maintaining lice-free herds.