Observations on the possible relationship between psoroptic mange of cattle and white spot damage on leather / John E. George in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXI (Année 1986)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXI (Année 1986) . - p. 296 - 304 Titre : Observations on the possible relationship between psoroptic mange of cattle and white spot damage on leather Type de document : texte imprimé Auteurs : John E. George, Auteur ; Fred C. Wright, Auteur ; Frank S. Guillot, Auteur ; Peter R. Buechler, Auteur Année de publication : 1986 Article en page(s) : p. 296 - 304 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A number of tanned cattle hides, thought to be primarily from animals slaughtered in the months from January through May on the high plains areas of Texas, Oklahoma, Colorada, Nebraska, and adjacent areas, have exhibited a defect, known as "white spots", in the enamel of the leather. To test the hypothesis that white spots can be caused by the early stages of a Psoroptes ovis infestation, cows were infested with either 50 or 200 mites at intervals of 3, 7, 10, 14, or 21 days before slaughter. White spots were detected only on blue stock hides from cows infested with both 50 and 200 mites for 14 days.Brown crust hides from the 50-mites infestations did not have white spots except for those from animals exposed for 10 or 14 days. The brown crust leather from animals infested with 200 mites for 10, 14 and 21 days were all blemished with white spots with the most extensive damage occuring on the animal that was infested for 14 days. Limited white spot damage was evident on the brown crust leather from one of the two uninfested control cows used in the study. Outbreaks of psoroptic mange have been most frequent during the months of November through March and have been most likely to occur in the high plains areas of Texas, Colorado, Nebraska, Oklahoma, and Kansas. Therefore, there is a putative relationship in both time and space between the occurence of outbreaks of psoroptic mange of cattle and hides that are damage by the presence of white spots, but conclusive evidence of a cause and effect relationship between white spots and P. ovis is lacking. En ligne : https://drive.google.com/file/d/1JfL9UE3BdLEatAkte9CvRruBtVLDcKmh/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9179 [article]

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