How do you treat a rat for lice? - briefly
Administer a veterinarian‑approved topical ectoparasiticide such as «selamectin» or a pyrethrin‑based spray directly to the fur, following the label dosage for rodents. Combine treatment with thorough cleaning of the cage, bedding, and accessories to prevent reinfestation.
How do you treat a rat for lice? - in detail
Treating a rat infested with lice requires accurate diagnosis, safe medication, and environmental sanitation.
First, confirm the presence of lice by examining the fur and skin for tiny, translucent insects moving rapidly and for small, pale eggs attached to hair shafts. A magnifying lens improves visibility.
Second, isolate the affected animal to prevent spread to cage mates. Place the rat in a clean, well‑ventilated enclosure with fresh bedding that will be discarded after treatment.
Third, apply an appropriate ectoparasiticide. Options include:
Topical permethrin solution (0.5 % concentration) – apply a few drops along the dorsal midline, avoiding the eyes and nose.
Topical pyrethrin‑based spray – mist the entire coat, ensuring thorough coverage of the ventral surface and tail.
* Oral ivermectin – administer 0.2 mg/kg body weight once, with a repeat dose after seven days if necessary.
Dosage calculations must consider the rat’s weight; a 250‑g adult requires approximately 0.05 ml of a 0.5 % permethrin solution.
Fourth, treat the environment. Wash all bedding, toys, and accessories in hot water (≥ 60 °C) and dry on high heat. Disinfect the cage with a diluted bleach solution (1 % sodium hypochlorite) followed by thorough rinsing.
Fifth, monitor the rat for two weeks. Inspect the coat daily for surviving insects or new egg clusters. If lice persist after the initial treatment, repeat the topical application after 48 hours, as many products require a second dose to target hatching larvae.
Finally, maintain preventive measures: routine health checks, regular cage cleaning, and avoidance of contact with wild rodents that may carry ectoparasites.