Often infected young ( 100 %), while in adults , there is little immunity to a mechanical age (60-70%) . During the summer gadfly sheep are crowded with his head down . I larvae stage , getting into the nasal passages , and cause pain protective response , causing sheep sniffing and sneezing . Sheep shaking his head , rubbing his nose. After 2-3 days appear seromucous expiration , then the clinical symptoms disappear , but with the size of the larvae appear again . In addition to nasal discharge , patients individuals disturbed coordination of movements ( circular motion in one direction — » stagger «), difficulty breathing .
The massive appearance of similar symptoms during the summer gadfly indicates possible disease flocks Estrosi . Diagnosis is based on clinical symptoms , bacteriological research expirations , opening sheep . Should differentiate this disease from gid , listeriosis and rabies. Treatment consists in the destruction of the larvae stage I in the nasal cavity .
To this end, inserted into each nasal cavity of the syringe or the syringe tip extension to 10-15 ml of 2 % aqueous solution hlorofosa in frontal sinus — 10 ml of a 3 % solution hlorofosa . For batch processing is used , for example, trichlorfon and 20 ml 10-24 % strength solution or powder hlorofosa 1-2.5 g per 1 m air exposure at 90 and 30 min. It is possible to use other drugs, such as various kinds of sprays or ivomek at 1 mL/50 kg subcutaneously.
Slaughter of animals treated with aerosol allowed after 72 hours In order to prevent it is not recommended to let the pasture sick animals without proper treatment . Autopsy fallen individuals should take place in specially equipped areas . Must be cleaned regularly and sheepyards tyrla from manure that biothermal warehoused for decontamination.