How to treat a skin mite on a rat? - briefly
Apply a veterinary‑approved acaricide, such as ivermectin or selamectin, following the rodent dosage guidelines, and simultaneously improve cage hygiene by cleaning bedding, disinfecting surfaces, and isolating the affected rat. Repeat the treatment after the mite’s life cycle (7–10 days) and monitor for lingering skin lesions.
How to treat a skin mite on a rat? - in detail
Treating a skin‑mite infestation in a laboratory or pet rat requires accurate diagnosis, appropriate medication, and environmental sanitation.
First, confirm the presence of mites by inspecting the animal’s coat for erythema, crusts, hair loss, or visible parasites. Microscopic examination of skin scrapings or tape impressions provides definitive identification. Once confirmed, isolate the affected rat to prevent spread to other cage mates.
Medication options fall into two categories:
- Topical agents – Apply a few drops of a licensed acaricide (e.g., selamectin, moxidectin, or a pyrethrin‑based product) directly to the affected skin. Follow the manufacturer’s dosage based on the animal’s weight; typical regimens involve a single application with a repeat dose after 7‑10 days if symptoms persist.
- Systemic treatments – Administer oral ivermectin at 0.2–0.4 mg/kg once daily for 3 days, or a single subcutaneous injection of milbemycin oxime at 0.5 mg/kg. Record the exact dose and monitor for signs of toxicity, especially in young or compromised rats.
Supportive care includes:
- Cleaning the cage with a dilute bleach solution (1 % sodium hypochlorite) and rinsing thoroughly.
- Replacing bedding with a non‑absorbent, low‑dust material.
- Providing a balanced diet and adequate hydration to aid recovery.
After treatment, re‑examine the rat after 7 days. Absence of lesions and negative skin scrapings indicate successful eradication. If symptoms recur, repeat the medication cycle or consider a different acaricide class.
Preventive measures:
- Maintain low humidity and regular cage cleaning.
- Quarantine new arrivals for at least two weeks, inspecting them before introduction.
- Use a monthly topical preventive on all colony animals when the risk of mite exposure is high.