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Oestrus ovis, the sheep bot fly, is a widespread species of fly of the genus Oestrus. It is known for its parasitic predation and damage to sheep, deer, goats and sometimes cattle. There have also been many records of horse, dog [1] and human infestation. In some areas of the world it is a significant pest which affects the agricultural economy.
In the case of stomach-bots it is often uncertain how much clinical disease or loss of production small levels of infestation causes the host. With infestations of warble-flies and nasal-bots severe distress to the hosts may be caused and there are production losses from reduction of value of cattle hides, and reduced grazing time by sheep.
The most common colonization site in the human body is within the nasal cavity and from here, the bacteria can cause infections. [ 42 ] [ 43 ] S. pseudintermedius infections in a human host have been known to cause endocarditis, post-surgical infections, inflammation of the nasal cavity ( rhinosinusitis ) and catheter-related bacteremia. [ 6 ]
Symptoms Cutaneous myiasis Painful, slow-developing ulcers or furuncle- (boil-) like sores that can last for a prolonged period Nasal myiasis Obstruction of nasal passages and severe irritation. In some cases, facial edema and fever can develop. Death is not uncommon. Aural myiasis Crawling sensations and buzzing noises.
Symptoms in domestic sheep can range from mild respiratory disease, severe pneumonia and even death. [1] Clinical and subclinical symptoms may be present in domestic sheep. Clinical symptoms may include fever, lethargy, decreased appetite, nasal discharge, coughing, and decreased milk production in ewes. [ 1 ]
Typical signs in dogs include sneezing, nasal discharge, bleeding from the nose, and ulcerations of the nose. [23] Pythiosis is a disease caused by a water mould of the genus Pythium, P. insidiosum. It occurs primarily in dogs and horses, but can also affect humans. In dogs it affects the gastrointestinal system and lymph nodes, and rarely the ...
enzootic nasal adenocarcinoma; foot-and-mouth disease; mastitis; Nairobi sheep disease orthonairovirus (NSDV) infection; orf, also known as contagious ecthyma, contagious pustular dermatitis, infectious labial dermatitis, thistle disease, sore mouth, or scabby mouth; ovine encephalomyelitis (louping ill) ovine progressive pneumonia (OPP)
Some countries allow mulesing, a practice that involves stripping away the skin on the rump to prevent fly-strike, normally performed when the sheep is a lamb. [122] [123] Nose bots are fly larvae that inhabit a sheep's sinuses, causing breathing difficulties and discomfort. Common signs are a discharge from the nasal passage, sneezing, and ...