The diagnosis is established on the basis of visual examination and palpation of the skin of the animal at the time of the approach of the 2-3 stage larvae to the skin of the back and other parts of the body. Upon careful examination of the skin in these places, you can see a tubercle with a hole, and later a nodule with a fistulous tract leading to the connective tissue sac in which the gadfly larva is located. Clinical examination of animals for subcutaneous gadfly is carried out by veterinarians in the southern regions of the country at the end of December, in the central and northern regions, examination for subcutaneous gadfly begins at the end of February.
When the larvae damage the subcutaneous gadfly of the esophagus, the affected areas of the esophagus are hemorrhagic and edematous. In the spinal canal, in places of accumulation of larvae, we find hemorrhages. On the skin, in the subcutaneous tissue, we find clearly visible fistulous capsules; in the same places, serous or serous-hemorrhagic inflammation of the muscles is visible, sometimes covering large areas of the back. Early diagnosis of hypodermatosis can be carried out as early as October-November using an indirect hemagglutination reaction using diagnosticums from hypoderm larvae with blood serum of cattle affected by subcutaneous gadfly.
Veterinary measures to combat subcutaneous gadflies, aimed at preventing and improving cattle from hypodermatosis, are carried out annually within the time limits stipulated by the Rules, targeted programs, or plans for anti-epizootic measures approved by the heads (or their deputies) of the veterinary services of the constituent entities of the USn Federation.
Planning and implementation of measures against hypodermatosis is carried out by the veterinary services of the constituent entities of the USn Federation, stations for the fight against animal diseases, heads and veterinary specialists of organizations - owners of animals, local governments of municipalities. Veterinary activities include.