What is the harm of goatnose fly maggot to people, and how to treat sheepnose fly maggot disease

It's not much harm to people, but it's harmful to sheep.

The affected sheep showed malaise, pale red visible mucosa, nostril discharge, shaking head, sneezing, movement disorders, head bending to one side or spasms, paralysis, decreased hearing and vision, difficulty in walking in hind limbs, sometimes unsteady standing, fall and die.

Control methods: The main measure to control the disease should be to eliminate the first stage of larvae. According to different climatic conditions and the development of sheep nose flies, the time of prevention and control can be determined, and it is generally advisable to carry out it in November every year. The following drugs may be used:

4-Bromo-2-chlorophenyl.

Oral dose is grams per kilogram of body weight, prepared into a 2% solution, and administered. Intramuscular injection take 60 grams of refined trichlorfon, add 31 ml of 95% alcohol, heat and dissolve in porcelain, add 31 ml of distilled water, and then heat to 60-65, after the drug is completely dissolved, add water to a total of 100 ml, and can be injected after filtering through the cotton wool. The dosage is 10-20 kg for sheep weight in milliliters; weight 20-30 kg with 1 ml; weight 30-40 kg with milliliters; weight 40-50 kg with 2 ml; For weight over 50 kg, use milliliters.

2,2-Dichlorovinyl.

Oral dose of 5 mg per kilogram of body weight once a day for two days. The smoke method is often used for the large-area prevention and control of sheep, and the dosage is calculated according to the space volume of the fumigation site, and 80% dichlorvos milliliters are used per cubic meter of space. The vaping time should be determined according to the safety test and deworming effect of the small flock of sheep, and generally not more than 1 hour is appropriate.

The aerosol method is also suitable for the prevention and control of large flocks of sheep, and the liquid can be atomized with an ultra-low amount electric sprayer or aerosol gun. The dosage and sucking time of the liquid medicine are the same as those of the smoke method. Coating method For individual breed sheep, 1% dichlorvos ointment can be rubbed around the nostrils of sheep during the adult fly season, once every 5 days, which can kill the larvae laid by the female.

At present, it is the best platform for sheep raising technology exchange.

There is a section called "Ask Me All Answers", and generally as long as the questions are clearly described, you can get answers from the forum goats.

If it is about sheep disease, it is best to explain in detail the size of the sheep, the breed, what materials are usually fed, and the changes in body temperature excretion. It would be better if it could be paired with a clear ** instructions.

Sheep nose fly magiasis is a disease caused by the larvae of sheep nose fly parasitic in the nasal cavity and nearby sinuses of sheep, and is more common in northwest, northeast and north China of China. The sheep nose fly mainly harms sheep and has a mild damage to goats. Sick sheep show mental restlessness, physical emaciation, and even death.

Pathogen, the adult sheep nose fly resembles a bee, with dense short villi all over the body, and the body length is 10 to 12 mm; The head is large and hemispherical, yellow. The larvae of the first stage are pale yellowish-white, 1 mm long; The larvae of the second stage are oval, 20 25 mm long, the body surface spines are inconspicuous, and the posterior valve is curved kidney-shaped; The larvae of the third stage are about 30 mm long and arched dorsally. Life history, the development of sheep nose flies needs to go through three stages: larva, pupae and adults.

Adults appear in May and September every year, after mating, the male dies quickly, and the female flies to the nose of the sheep in a sharp and sudden action during the sunny day, laying the larvae in or around the nostrils of the sheep, and the female dies soon after giving birth to the larvae within a few days. The first stage of larvae produced is very active, crawling into the nasal cavity and fixing itself on the nasal mucosa with its anterior mouth hook, and gradually migrating deep into the nasal cavity to reach the frontal sinus or sinus (some larvae can also enter the human cranial cavity), and after two metamorphoses and develop into the third stage larvae. The larvae parasitize in the nasal cavity for 9 10 months, and by the spring of the following year, the mature third stage larvae migrate back from the deep to the superficial part of the nasal cavity, and when the affected sheep sneezes, they spray it out of the nostrils, and the third stage larvae become pupated in the surface layer of the soil or in sheep feces, and the appearance of the pupal is the same as that of the third stage larvae.

Pupae emerge into adults after 1 to 2 months. Adult lifespan 2-3 weeks. The sheep nose fly can reproduce for 2 generations per year in warm areas and 1 generation per year in cold regions.

After the larvae of the sheep nose fly enter the nasal cavity, frontal sinus and sinus of sheep, in the process of their migration, due to the small spines on the body surface and the anterior hook damage to the mucous membrane caused by rhinitis, it can be seen that the sheep exudes a large amount of nasal fluid, which is serous at first, then mucous and purulent, sometimes mixed with blood; When a large amount of nasal fluid dries up and forms a hard scab around the nostrils, it makes it difficult for the sheep to breathe. In addition, it can be seen that the sick sheep are restless, sneezing, often shaking their heads, wiping their noses, their eyelids are swollen, tearing, their appetite is reduced, and they are becoming emaciated. Symptoms may persist for several months depending on the stage of development of the larvae in the nasal cavity.

Infection is usually acute soon after the infection and gradually improves thereafter, with more intense disease in the late stages of larval parasitism. Sometimes, when individual larvae enter the cranial cavity and damage the meninges or affect the meninges due to inflammation of the sinuses, it can cause neurological symptoms, and the sick sheep manifests as dyskinesia, rotational movement, head bending to one side or paralysis; In the end, the sick sheep lost its appetite and died of extreme exhaustion.