Investigation on Ectoparasites of Small Ruminants in Selected Sites of Amhara Regional State and there Impact on the Tanning Industry
| dc.contributor.author | Sertse,Tefera | |
| dc.date.accessioned | 2021-10-19T10:59:30Z | |
| dc.date.accessioned | 2023-11-08T11:36:57Z | |
| dc.date.available | 2021-10-19T10:59:30Z | |
| dc.date.available | 2023-11-08T11:36:57Z | |
| dc.date.issued | 1999-12 | |
| dc.description.abstract | The objectives of this study were to determine the prevalence of ectoparasites on sheep and goats. assess the effect of major ectoparasites on the quality of skin processed in the tanneries and identify the type and magnitude of defects that cause down grading and rejection in pickled sheep and wet blue goat pelts. The study was carried out through questionnaire survey, clinical examination and analysis of pickled and wet blue skin defects in Kombolcha and Dessei tanneries. 0 ut of 7 52 sheep and 752 goals examined 50.5% of s heep and 56.4% of goats were found infested with one or more ectoparasites. The major cctoparasitcs identified on sheep were D ovis (38.5%), A{ 0\,;'1115 (12.5%), tick infestations (3.4%) and Linog"athus spp. (2.4%). The major ectoparasites recorded on goats were Lillogllarlws spp, (28,3%), ticks (22.2%), sarcoplic mange (6.1 %) and Ctenocephalides spp (8.1 %). In sheep, there was significant difference (p<O.OOI) in prevalence of M. OVillliS and D. ov;s, between lowland and highland and midland and highland. There was also significant difference in prevalence of Linognathus spp. between midland and lowland (p<O.OJ) and tick infestations between lowland and midland (p<O.OI), and between lowland and highland (p<O.OOI) but no significant difference (P>O.05) was detected in prevalence of sarcoptic mange and Ctenocephalides spp. In goats, the risk of sarcoptic mange infestation in lowland (Odds ratio (OR) =4.6, p<O.OOl) and midland (OR=5.0, p<0.05) was 4.6 times and 5.0 times, respectively highe r than the highlands. There was also significant difference in prevalence of Linognathus spp between lowland and highland (p<O.01) and Ctellocephalides spp. infestations between midland and highland (p<O.OO I) and between midland and lowland (p<O.OO I) agro climate, the risk being higher in midland. Both in sheep and goats no significant difference (p>0.05) was recorded in prevalence of all ectoparasites except D. ovis infestation by age. D. ovis was found to affect more significantly (p<0.05) the adults (42.2%) than the young (29.9%) sheep. Analysis of body condition showed no significant varia tion (p>O.05) to ectoparasite infestation in sheep. However, poor body condition goats \'-'ere 4.3 times at risk from sa rcoptic mange (OR=4.3, p<O.OOI), Lillogllathus spp. (OR=2.1. p<O.OOI) and 'ick (OR=1.6. p<O.05) infesllllion 'han good body condition goats. The prevalence of M. o viII liS was significantly higher in wooly sheep (41.2%) than wooly sheared (0.8%) and hairy (0%) indicating the importance of wool size for the parasite abundance. The prevalence of'ekek' at pickled stage on each group of20 pickled sheep pelts infested with D o\'is and M. ovillltS and each group of 20 pickled goat pelts infested with sarcoptic mange and Linognothlls spp. were 100% and 95% and 100% and nil respectively. However, the prevalence on apparentl y free control groups 20 sheep and 20 goat | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/28249 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | AAU | en_US |
| dc.subject | Ectoparasites. Skin defects, Skin Quality. Sheep. Goats, Tannery. Amhara Region. | en_US |
| dc.title | Investigation on Ectoparasites of Small Ruminants in Selected Sites of Amhara Regional State and there Impact on the Tanning Industry | en_US |
| dc.type | Thesis | en_US |