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Biomedical subjects

H Farmer

Publications and source records attributed to H Farmer.

13 recordsLinked to original sources
PubMed1986

Pancreatic duct obstruction in a stunting syndrome of broiler chickens.

Broilers suffering from stunting syndrome from three farms were shown to have pancreatic atrophy and fibrosis similar to that seen in pancreatic duct obstruction in chickens and mammals. Interlobular and intercalated ducts were found to be stenotic or occluded with inflammation and necrosis of the epithelium and wall. Inclusion bodies were seen in some duct cells. It is suggested that pancreatic duct obstruction is responsible for the maldigestion and pancreatic lesions seen in stunting syndrome.

Animals↗
PubMed1980

The use of amitraz (N1-(2,4-dimethylphenyl)-N-[(2,4-dimethylphenyl)imino)-methyl]-N-methylmethanimidamide) in demodecosis in dogs.

Amitraz topically applied as an 0.025 or 0.05% aqueous suspension once or twice weekly for up to 8 weeks cured 3 cases of generalised squamopapular to pustular demodectic mange and effectively controlled the condition in a fourth dog. Three of these dogs were Dobermans in which the disease was refractory to standard therapy with ronnel. A single wash in 0.025% amitraz suspension was sufficient to cure each of 5 dogs affected with localized demodecosis within 2 to 4 weeks. At these dose levels the drug is non toxic and non irritant to skin and mucous membranes. Recommendations for the use of amitraz include a thorough prewash of the entire skin surface with soap and water followed by application of the drug suspension with vigorous scrubbing, the compound then being allowed to dry on the animal's skin. The availability of amitraz therapy appears to provide a favourable prognosis for the control of severe long standing mange in the dog.

Animals↗
PubMedDate not supplied

Low-profile dynamic splints: a solution to the friction problem.

To find a solution to the problem of friction between the nylon fishing line and the outrigger of a low-profile dynamic splint, a jig was manufactured to bend notches in 2.5-mm copper-coated welding rod. This type of outrigger was compared with an adjustable stainless-steel outrigger to determine which of the two types produces the least amount of friction. As one of each type of outrigger was covered with a layer of Teflon paint, four different outriggers were compared with each other: welding rod only, welding rod with Teflon, stainless steel with Teflon, and stainless steel only. Equal traction units were attached to each of the outriggers and the amount of elongation of a 50-mm tension spring was measured when a 300-g weight was hooked onto it. This was compared with the elongation of the same spring when no friction was present. The results show that the Teflon-covered outriggers displayed significantly (on a 5% level) less friction than did the uncovered outriggers. The stainless-steel outrigger with Teflon performed slightly better than the welding-rod outrigger with Teflon. However, there was no significant difference between these two outriggers, and because the welding-rod outrigger is cheaper and more readily available, it is recommended for clinical use.

Equipment Design↗