Document Detail

Epidemiologic factors involved in perinatal lamb mortality on four range sheep operations.
MedLine Citation:
PMID:  1575396     Owner:  NLM     Status:  MEDLINE    
Four shed-lambing operations in western Colorado were monitored during the 1984 spring lambing season to determine the causes and rates of perinatal lamb mortality. The number of lambing ewes per flock ranged from 513 to 1,712, and lambing percentages ranged from 131 to 180%. Overall perinatal lamb mortality ranged from 8.2 to 12.2%. Most lamb deaths occurred during parturition or within 24 hours after parturition. More than 85% of all lamb deaths were in lambs born to ewes having 2 or more lambs. The leading causes of lamb death were starvation, dystocia, stillbirth (unknown cause), and infectious diseases. A wheel model was used to categorize factors causing lamb deaths into 4 groups: physical, social, host, and biological, and to present data on perinatal lamb mortality in a simple visual model. In all flocks, social and biological factors resulted in most of the lamb deaths. On the basis of our findings, we suggest that interventions designed to improve ewe-lamb bonding and to reduce infectious agents and the incidence of prolonged parturition may reduce lamb mortality.
J P Rowland; M D Salman; C V Kimberling; D J Schweitzer; T J Keefe
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of veterinary research     Volume:  53     ISSN:  0002-9645     ISO Abbreviation:  Am. J. Vet. Res.     Publication Date:  1992 Feb 
Date Detail:
Created Date:  1992-06-04     Completed Date:  1992-06-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375011     Medline TA:  Am J Vet Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  262-7     Citation Subset:  IM    
Department of Environmental Health, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523.
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MeSH Terms
Animals, Newborn
Dystocia / mortality,  veterinary*
Enteritis / mortality,  veterinary
Fetal Death / epidemiology,  veterinary*
Infection / mortality,  veterinary*
Litter Size
Pneumonia / mortality,  veterinary
Sepsis / mortality,  veterinary
Sheep Diseases / mortality*
Starvation / mortality,  veterinary*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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