FACTORS AFFECTING MORBIDITY AND MORTALITY ON-FARM AND ON-STATION IN THE ETHIOPIAN HIGHLAND SHEEP

被引:28
作者
BEKELE, T
WOLDEAB, T
LAHLOUKASSI, A
SHERINGTON, J
机构
[1] International Livestock Centre for Africa (ILCA), Addis Ababa
关键词
SHEEP; ANIMAL HEALTH; MORBIDITY; MORTALITY; ON-FARM; ON-STATION; ETHIOPIAN HIGHLANDS;
D O I
10.1016/0001-706X(92)90025-S
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
Factors affecting morbidity and mortality of the Ethiopian highland sheep were studied both on-farm and on-station at Debre Berhan between 1989 and 1990. Primary causes of infectious origin resulted in high proportional morbidity (88.4% on-farm) and mortality (72.9% on-farm and 71.8% on-station) rates. Nutritional and managemental factors were also responsible for mortalities in lambs. The most frequent secondary causes of morbidity and/or mortality were ectoparasites and nasal myiasis. Health management interventions on-station were not high enough to produce performance improvements above the on-farm levels. However. the occurrence of gastrointestinal parasites significantly (P<0.05) differed between the two management systems. The frequency of some of the major causes of morbidity and mortality such as pneumonia, fasciolasis and enteritis were significantly (P<0.01) affected by season and age of an animal. In order to alleviate the major health constraints identified in this study, a proper health management intervention involving vaccination, strategic anthelmintic treatment and feeding management are suggested.
引用
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页码:99 / 109
页数:11
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