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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Risk factors associated with Lawsonia intracellularis in English pig farms
Veterinary Journal, Volume 197, No. 3, Year 2013
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Description
Porcine proliferative enteropathy (PPE) caused by the bacterium Lawsonia intracellularis causes considerable economic loss to the pig industry. The objective of this study was to evaluate the seroprevalence of L. intracellularis exposure in different age groups of pigs (growers to finishers) within English farms and to identify potential risk factors. Samples were obtained in a cross-sectional study of 147 farms between 2008 and 2009. Twelve samples (six growers and six finishers) from each farm were tested for L. intracellularis by antibody ELISA.At animal level there was a significant positive linear trend between seroprevalence and age in weeks (r2=2.65, P<0.001), with seroprevalence lowest (24.73%) at 11weeks and highest (93.33%) at 24weeks. At farm level, seroprevalence was significantly lower in growers than finishers (56.80% vs. 94.26%, P<0.001). Farms reporting minor Salmonella problems and those that brought boars onto the farm had higher odds of testing positive in growers (OR 5.69 and 4.31, respectively. On the other hand, farms where producers considered temperature as an important stress factor (OR=0.3) and which had more than two sites on which pigs are kept (OR=0.16) were less likely to test positive in growers. The current study confirmed the high prevalence of L. intracellularis in English pig farms. The potential risk factors and further information of the disease impact on the farm productivity will aid the development of appropriate control strategies through better understanding of the disease. © 2013 Elsevier Ltd.
Authors & Co-Authors
Wieland, Barbara
United Kingdom, London
Royal Veterinary College University of London
Switzerland, Bern
Swiss Agency for Development and Cooperation
Sait, Michelle L.
United Kingdom, Midlothian
Moredun Research Institute
Longbottom, David
United Kingdom, Midlothian
Moredun Research Institute
Smith, David G.E.
United Kingdom, Midlothian
Moredun Research Institute
United Kingdom, Glasgow
University of Glasgow
Alarcón, Pablo
United Kingdom, London
Royal Veterinary College University of London
Wheelhouse, Nick M.
United Kingdom, Midlothian
Moredun Research Institute
Statistics
Citations: 7
Authors: 6
Affiliations: 4
Identifiers
Doi:
10.1016/j.tvjl.2013.03.020
ISSN:
15322971
Research Areas
Infectious Diseases
Study Design
Cross Sectional Study
Study Approach
Quantitative