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Sheep scabies
Sheep mange is a skin disease caused by a tiny mite that lives on the surface of the skin, under the wool, and causes intense itching. It mainly attacks areas well covered with wool: sides, shoulders, back, base of the tail. It is one of th...
What is it?
Sheep mange is a skin disease caused by a tiny mite that lives on the surface of the skin, under the wool, and causes intense itching.
It mainly attacks areas well covered with wool: sides, shoulders, back, base of the tail.
It is one of the most contagious diseases of sheep: it passes from one animal to another by simple contact and spreads to an entire flock within a few weeks.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
Violent and permanent itching: animals rub against walls, fences, feeders, bite their sides.
Characteristic reflex: when the back or flank of an affected animal is scratched, it tenses its neck, twists its head and makes biting movements with its lips.
Wool coming off in strands and patches, fleece torn off, tufts of wool hanging on fences and water troughs.
Yellowish crusts, moist then dry, at the base of the wool, on the outskirts of bare areas.
Thickened, reddened skin, sometimes oozing, with wounds from scratching.
Agitated animals, which no longer graze properly and lose weight.
In severe and neglected forms, the animal becomes exhausted and may exhibit nervous attacks during attacks of itching.
The signs worsen in winter, under long wool, and become more discreet in summer.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
The mite lives on the surface of the skin, under the wool, where it feeds and multiplies.
Its droppings and secretions trigger a strong reaction in the skin: it is this reaction, more than the mite itself, which causes the itching and scabs.
The parasite reproduces very quickly in a warm and humid environment, which the fleece provides perfectly.
A few mites are enough to contaminate an animal, then an entire herd.
Introduction of animals without quarantine or examination, purchases at fairs, loans of rams.
Groupings: winter sheepfolds, transhumance, common parks, gatherings and markets.
Mowing equipment shared between farms and not disinfected.
Long fleece and cold season, which favor the multiplication of the mite.
Partial treatments, limited only to scratching animals, which leave carriers in the group.
Buildings poorly cleaned, reused without disinfection after an episode.
Transmission
By direct contact between animals: this is the main mode, particularly in sheepfolds in winter, when the animals are crowded together.
By the wool left on fences, feeders, feeders, rubbing walls, where the mite survives for a certain time outside the animal, enough to contaminate the next ones.
By mowing equipment, livestock trailers, sorting yards and the hands or clothing of those involved.
By the introduction of a purchased animal, sometimes without visible signs: a discreet carrier is enough to revive the disease in a cleansed herd.
This sheep scab does not affect humans.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
Diagnosis is not made by eye: there are many conditions that cause a sheep to scratch, including lice, honey beetles, ringworm and other skin diseases. Dealing haphazardly wastes time and money.
The veterinarian scrapes the skin at the edge of a lesion, where the mites are most numerous, and identifies them under a microscope.
He looks at the entire flock, not just the scratching animals, to gauge the true extent of the problem.
He also assesses the general condition: a herd that has been scratching for weeks is often thin and fragile.
In many countries, sheep scabies is subject to special health measures and rules to be respected when moving animals: check with your veterinarian and local veterinary services.
Treatment
The absolute rule: we treat the entire herd at the same time, never just the animals that scratch themselves. Animals without visible signs almost always harbor mites and recontaminate others.
Two main approaches exist, to be chosen with the veterinarian: injectable antiparasitics from the macrocyclic lactone family, or external treatments by balneation or skin application with acaricidal products.
Each approach has its constraints: material, labor, season, length of wool, presence of animals in lactation or at the end of gestation. The veterinarian arbitrates and sets the course, including the need for a second pass to reach the mites hatched after the first.
No dose or rhythm can be improvised. Products intended for other species, homemade preparations, diesel and household products applied to the skin are ineffective and dangerous for the animal and for the person handling them.
Treating animals is not enough: buildings, guardrails, rubbing zones, shearing equipment and vehicles must be cleaned and disinfected, and avoid putting treated animals back into an unsanitized environment.
Waiting times for meat and milk vary depending on the product; they must be requested from the veterinarian and strictly respected.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Systematic quarantine of any animal purchased or returned from an assembly, with examination and treatment decided by the veterinarian before introduction into the herd.
Avoid lending animals and sharing undisinfected mowing equipment.
Clean and disinfect the sheepfold between batches, as well as the livestock trailers.
Inspect the skin and wool when shearing, an ideal time to spot the first cases.
Intervene as soon as the first animals scratch, without waiting for the entire flock to be affected.
Inform the buyer or seller if in doubt: the disease travels with animals.
Possible complications
Marked weight loss and drop in performance, animals spending their time scratching instead of grazing.
Fleece destroyed, total loss of value of wool and skins.
Skin injuries and infections related to scratching.
Damaged and soiled skin that attracts flies: increased risk of myiasis during the hot season.
Exhaustion and mortality in young or already weakened animals, in neglected forms.
Reinfestation of the herd if the treatment was partial or if the buildings were not sanitized.
When to see a veterinarian
One or more animals are constantly scratching against walls and fences.
Tufts of wool remain clinging to fences and feeders.
Patches of wool fall off, leaving crusty, thickened skin.
An animal chews its sides or reacts strongly when its back is scratched.
Animals lose weight even though they are well fed.
You have just introduced animals and itching appears in the following weeks: have the batch examined quickly.
Prognosis
The individual prognosis is good when the diagnosis is confirmed and the treatment is carried out correctly across the entire herd.
The wool, however, takes several months to grow back and the year's fleece is lost.
Failures almost always come from the same place: treatment limited to visibly affected animals, buildings not sanitized, or new animal introduced without quarantine.
Frequently asked questions
Can I treat only scratching sheep?
No, this is the most common error. Animals without visible signs already carry the mite and recontaminate others as soon as treatment ends. The entire batch must be treated at the same time, according to the protocol defined by the veterinarian.
Is sheep scabies caught by humans?
This mite does not settle on human skin. Prolonged contact may cause transient irritation, but there is no lasting illness in humans. Washing your hands and changing clothes after handling animals remains a good practice.
My sheep is scratching, is it necessarily scabies?
No. Lice, honey beetles, ringworm and several skin diseases cause similar itching and are not treated in the same way. A skin scraping examined under a microscope allows the veterinarian to make a decision quickly.
Should I clean the barn after treating my animals?
Yes. The mite survives for a time on the wool left on the walls, the rails and on the equipment. Without cleaning and disinfection, the herd becomes recontaminated and the treatment appears to have failed.
References
FAO — Organisation des Nations unies pour l'alimentation et l'agriculture
ANSES — Agence nationale de sécurité sanitaire (France)
Content reviewed by the TunisieVet editorial team · Updated 09 August 2026
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