| Preliminary investigations into the aetiology and treatment of cockle, a sheep pelt defect. | |
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MedLine Citation:
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PMID: 7732648 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A defect of sheep pelts known as cockle, detectable after depilation, but usually first noted only in the pickled pelt or tanned stage of processing, was studied to establish causal factor(s) and effective treatments. In addition, data on the histology and seasonal prevalence of the disease were obtained. Samples collected soon after slaughter from pelts identified at the pickled pelt stage as having cockle, had a superficial dermatitis with infiltration of eosinophils. This may represent an immediate hypersensitivity reaction of the sheep to lice. Treatments of sheep with either insecticides, disinfectants or shearing showed that where biting lice (Bovicola ovis) were removed, cockle lesions had either disappeared or regressed on pickled pelts. In Trial 1 diazinon reduced cockle prevalence and severity substantially; cypermethrin had a less pronounced effect. In Trial 2 diazinon, cypermethrin, Hibitane and Savlon were equally effective in reducing biting louse numbers as shown by counts of lice at 35 and 63 days post-treatment. Reduction of cockle on pelts from sheep slaughtered at 39 days post-treatment was achieved best by both diazinon and shearing. Examination of other pelts at 67 days post-treatment showed diazinon and Hibitane to be equally effective in reducing cockle. Furthermore, shearing in the absence of insecticides reduced the severity and extent of lesions on cockled pelts. The diazinon excipient and zinc sulphate were consistently poor at removing lice and reducing cockle prevalence and severity. The results have important implications for the leather industry in that shearing and good dipping practice with appropriate chemicals at the right time can lead to improved pelt quality. However, an incentive scheme for farmers, and a means of identifying individual pelts to the farms or origin, are both necessary before a marked improvement is likely to occur. |
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Authors:
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A C Heath; D J Cole; D M Bishop; A Pfeffer; S M Cooper; P Risdon |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Veterinary parasitology Volume: 56 ISSN: 0304-4017 ISO Abbreviation: Vet. Parasitol. Publication Date: 1995 Jan |
Date Detail:
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Created Date: 1995-06-01 Completed Date: 1995-06-01 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7602745 Medline TA: Vet Parasitol Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 239-54 Citation Subset: IM |
Affiliation:
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Wallaceville Animal Research Centre, AgResearch, Upper Hutt, New Zealand. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Diazinon / therapeutic use Insecticides / therapeutic use* Prevalence Pyrethrins / therapeutic use Sheep Sheep Diseases / epidemiology*, prevention & control, therapy Skin / anatomy & histology, pathology Skin Diseases / prevention & control, therapy, veterinary* Wool |
| Chemical | |
Reg. No./Substance:
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0/Insecticides; 0/Pyrethrins; 333-41-5/Diazinon; 52315-07-8/cypermethrin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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